AD 2006-12-07 ACTIVE

The FAA is superseding an existing airworthiness directive (AD) for Lycoming Engines (formerly Textron Lycoming) models 320, 360, and 540 series, "Parallel Valve" reciprocating engines, with certain Engine Components Inc. (ECi) cylinder assemblies, part number (P/N) AEL65102 series "Classic Cast", installed. That AD currently requires replacing these ECi cylinder assemblies. This AD requires the same actions, but replaces the "Engine Models" Table 1 and "Engines Installed On, But Not Limited To" Table 2 with corrected tables. Also, this AD corrects the casting part number. This AD results from reports of applicability errors found in AD 2005-26-10. We are issuing this AD to prevent loss of engine power due to cracks in the cylinder assemblies and possible engine failure caused by separation of a cylinder head.

Final rule.

2006-12-07 Engine Components Incorporated (ECi): Amendment 39-14632. Docket No. FAA-2005-22358; Directorate Identifier 2005-NE-20-AD.

Effective Date

(a) This airworthiness directive (AD) becomes effective July 11, 2006.

Affected ADs

(b) This AD supersedes 2005-26-10, Amendment 39-14431.

Applicability

(c) This AD applies to Lycoming Engines (formerly Textron Lycoming) models 320, 360, and 540 series, parallel valve, reciprocating engines:

(1) Specified in Table 1 of this AD; and

(2) With ECi cylinder assemblies, part number (P/N) AEL65102 series "Classic Cast", having casting head markings EC 65099-REV- 1; and

(3) With serial numbers (SNs) 1 through 9879 (SN may have an "L" prefix for a long reach spark plug), (sold from January 1997 to September 2001) installed.

(4) The set of numbers appearing on the cylinder, below and to the left of the SN, in the form of "12345-67" is not used for determining applicability.

Table 1.--Engine Models

Cylinder head part No.
Installed on engine models

O 320 A1B, A2B, A2C, A2D, A3A, A3B, B2B, B2C, B2D, B2E, B3B, B3C, C2B, C2C, C3B, C3C, D1A, D1AD, D1B, D1C, D1D, D1F, D2A, D2B, D2C, D2F, D2G, D2H, D2J, D3G, E1A, E1B, E1C, E1F, E1J, E2A, E2B, E2C, E2D, E2E, E2F, E2G, E2H, E3D, E3H.

IO 320 A1A, A2A, B1A, B1B, B1C, B1D, B1E, B2A, D1A, D1AD, D1B, D1C, E1A, E1B, E2A, E2B.

AEIO 320 D1B, D2B, E1A, E1B, E2A, E2B.

AIO 320 A1A, A1B, A2A, A2B, B1B, C1B.

AEL65102 NST04 ..............
LIO 320 B1A.
AEL65102 NST05 ..............
IO 320 C1A, C1B, C1F, F1A.

LIO 320 C1A.
AEL65102 NST06 ..............
O 320 A1A, A2A, A2B, A2C, A3A, A3B, A3C, E1A, E1B, E2A, E2C, (also, an O 320 model with no suffix). IO 320 A1A, A2A.
AEL65102 NST07 ..............
IO 320 B1A, B1B.

LIO 320 B1A.
AEL65102 NST08 ..............
O 320 B1A, B1B, B2A, B2B, B3A, B3B, B3C, C1A, C1B, C2A, C2B, C3A, C3B, C3C, D1A, D1B, D2A, D2B, D2C.

O 360 A1A, A1C, A1D, A2A, A2E, A3A,A3D, A4A, B1A, B1B, B2A, B2B, C1A, C1C, C1G, C2A, C2B, C2C, C2D,

D1A, D2A, D2B.

IO 360 B1A, B1B, B1C.

HO 360 A1A, B1A, B1B.

HIO 360 B1A, B1B.

AEIO 360 B1B.

O 540 A1A, A1A5, A1B5, A1C5, A1D, A1D5, A2B, A3D5, A4A5, A4B5, A4C5, A4D5, B1A5, B1B5, B1D5, B2A5,
B2B5, B2C5, B2C5D, B4A5, B4B5, B4B5D, D1A5, E1A, E4A5, E4B5, E4C5, F1A5, F1B5, G1A5, G2A5.
AEL65102 NST10 ..............
IO 540 C1B5, C1C5, C2C, C4B5, C4B5D, C4C5, D4A5, D4B5, N1A5, N1A5D.

O 360 A1A, A1AD, A1D, A1F, A1F6, A1F6D, A1G, A1G6, A1G6D, A1H, A1H6, A1J, A1LD, A1P, A2A, A2D, A2F,
A2G, A2H, A3A, A3AD, A3D, A4A, A4AD, A4D, A4G, A4J, A4JD, A4K, A4M, A4N, A4P, A5AD, B1A, B2C, C1A,
C1C, C1E, C1F, C1G, C2A, C2B, C2C, C2D, C2E, C4F, C4P, D2A, F1A6, G1A6.

HO 360 C1A.

LO 360 A1G6D, A1H6.

HIO 360 B1A, B1B, G1A.

LTO 360 A1A6D.

TO 360 A1A6D.

IO 360 B1B, B1BD, B1D, B1E, B1F, B1F6, B1G6, B2E, B2F, B2F6, B4A, E1A, L2A, M1A, M1B.

AEIO 360 B1B, B1D, B1E, B1F, B1F6, B1G6, B1H, B2F, B2F6, B4A, H1A, H1B.

O 540 A4D5, B2B5, B2C5, B2C5D, B4B5, B4B5D, E4A5, E4B5, E4B5D, E4C5, G1A5, G1A5D, G2A5, H1A5,
H1A5D, H1B5, H1B5D, H2A5, H2A5D, H2B5D.

IO 540 C4B5, C4B5D, C4D5, C4D5D, D4A5, D4B5, D4C5, N1A5, N1A5D, T4A5D, T4B5, T4B5D, T4C5D, V4A5,
V4A5D.
AEL65102 NST12 ..............
AEIO 540 D4A5, D4B5, D4C5, D4D5.

IO 540 J4A5, R1A5.
AEL65102 NST26 ..............
TIO 540 C1A, E1A, G1A, H1A.

IO 360 F1A.

TIO 540 AA1AD, AB1AD, AB1BD, AF1A, AG1A, AK1A, C1A, C1AD, K1AD.
AEL65102 NST38 ..............
LTIO 540 K1AD.

O 360 J2A.

O 540 F1B5, J1A5D, J1B5D, J1C5D, J1D5D, J2A5D, J2B5D, J2C5D, J2D5D, J3A5, J3A5D, J3C5D.
AEL65102 NST43 ..............
IO 540 AB1A5, W1A5, W1A5D, W3A5D.
AEL65102 NST44 ..............
O 540 L3C5D.

For information, the subject engines are installed on, but not limited to, the aircraft listed in the following Table 2:

Table 2.--Engines Installed On, But Not Limited to

Piper Aircraft: Tri-Pacer (PA 22 "150", PA 22S "150"), Apache (PA 23), Pawnee (PA 25).

Doyn Aircraft: Doyn-Cessna (170, 170A, 170B).

Mooney Aircraft: Mark (20A).

Dinfia: Ranquel (1A 46).

Simmering-Graz Pauker: Flamingo (SGP M 222).

Aviamilano: Scricciolo (P 19).
O 320 A1A ........................
Vos Helicopter Co.: Spring Bok.

Piper Aircraft: Tri-Pacer (PA 22 "150", PA 22S "150"), Apache (PA 23).

Doyn Aircraft: Doyn-Cessna (170, 170A, 170B).
O 320 A1B ........................
S.O.C.A.T.A.: Horizon (Gardan).

Piper Aircraft: Tri-Pacer (PA 22 "150", PA 22S "150"), Agriculture (PA 18A "150") Super Cub (PA 18 "150"),

Caribbean (PA 22 "150"), Pawnee (PA 25).

Intermountain Mfg. Co.: Call Air Texas (A 5, A 5T).

Lake Aircraft: Colonial (C 1).

Rawdon Bros.: Rawdon (T 1, T 15, T 15D).

Shinn Engineering: Shinn (2150 A).

Dinfia: Ranquel (1A 46).

Neiva: (1PD 5802).

Sud: Gardan-Horizon (GY 80).

LaVerda: Falco (F8L Series II, America).

Malmo: Vipan (MF1 10).

Kingsford Smith: Autocrat (SCRM 153).
O 320 A2A ........................
Aero Commander: 100.

Piper Aircraft: Tri-Pacer (PA 22 "150", PA 22S "150"), Cherokee (PA 28 "150"), Super Cub (PA 18 "150").

Champion Aircraft: Challenger (7GCA, 7GCB, 7KC), Citabria (7GCAA, 7GCRC), Agriculture (7GCBA).

Beagle: Pup (150).

Artic: Interstate S1B2.

Robinson: R 22.
O 320 A2B ........................
Varga: Kachina 2150A.

Robinson: R 22.

Cicare: Cicare AG.
O 320 A2C ........................
Bellanca Aircraft: Citabria 150 (7GCAA), Citabria 150S (7GCBC).
O 320 A2D ........................
Piper Aircraft: Apache (PA 23).

Doyn Aircraft: Doyn-Cessna (170, 170A, 170B).
O 320 A3A ........................
Corben-Fettes: Globe Special (Globe GC 1B).

Piper Aircraft: Apache (PA 23).

Doyn Aircraft: Doyn-Cessna (170, 170A, 170B).
O 320 A3B ........................
Teal II: TSC (1A2).

Piper Aircraft: Apache (PA 23 "160").

Doyn Aircraft: Doyn-Cessna (170, 170A, 170B).
O 320 B1A ........................
Malmo: Vipan (MF1 10).
O 320 B1B ........................
Piper Aircraft: Apache (PA 23 "160"). Doyn Aircraft: Doyn-Cessna (170, 170A, 170B)
O 320 B2A ........................
Piper Aircraft: Tri-Pacer (PA 22 "160", PA 22S "160").

Piper Aircraft: Tri-Pacer (PA 22 "160", PA 22S "160").

Beagle: Airedale (D5 160).

Fuji-Heavy Industries: Fuji (F 200).
O 320 B2B ........................
Uirapuru: Aerotec 122.
O 320 B2C ........................
Robinson: R 22.
O 320 B2D ........................
Maule: MX 7 160.
O 320 B2E ........................
Lycon.

Piper Aircraft: Apache (PA 23 "160").
O 320 B3A ........................
Doyn Aircraft: Doyn-Cessna (170, 170A, 170B).

Piper Aircraft: Apache (PA 23 "160").

Doyn Aircraft: Doyn-Cessna (170, 170A, 170B).
O 320 B3B ........................
Sud: Gardan (GY80 160).

Piper Aircraft: Apache (PA 23"160").
O 320 C1A ........................
Riley Aircraft: Rayjay (Apache).
O 320 C1B ........................
Piper Aircraft: Apache (PA 23 "160").
O 320 C3A ........................
Piper Aircraft: Apache (PA 23 "160").
O 320 C3B ........................
Piper Aircraft: Apache (PA 23 "160").

Sud: Gardan (GY 80).

Gyroflug: Speed Cancard.
O 320 D1A ........................
Grob: G115.
O 320 D1F ........................
Slingsby: T67 Firefly.

Piper Aircraft: Cherokee (PA 28S "160").

Robin: Major (DR400 140B), Chevalier (DR 360), (R 3140).

S.O.C.A.T.A.: Tampico TB9.

Slingsby: T67C Firefly. Daetwyler: MD 3 160. Nash Aircraft Ltd.: Petrel.

Aviolight: P66D Delta.
O 320 D2A ........................
General Avia: Pinguino.

Beech Aircraft: Musketeer (M 23).
O 320 D2B ........................
Piper Aircraft: Cherokee (PA 28 "160").
O 320 D2J ........................
Cessna Aircraft: Skyhawk 172.
O 320 D3G .......................
Piper Aircraft: Warrior II, Cadet (PA 28 161).
O 320 E1A ........................
Grob: G115.
O 320 E1C ........................
M.B.B. (Messerschmitt-Boelkow-Blohm): Monsun (BO 209 B).
O 320 E1F ........................
M.B.B.: Monsun (BO 209 B).

Piper Aircraft: Cherokee (PA 28 "140", PA 28 "150").

Robin: Major (DR 340), Sitar, Bagheera (GY 100 135).

S.O.C.A.T.A.: Super Rallye (MS 886), Rallye Commodore (MS 892).

Siai-Marchetti: (S 202).

F.F.A.: Bravo (AS 202/15). Partenavia: Oscar (P66B), Bucker (131 APM). Aeromot: Paulistina P 56.
O 320 E2A ........................
Pezetel: Koliber 150.

Beech Aircraft: Musketeer III (M 23III).
O 320 E2C ........................
M.B.B.: Monsun (BO 209 B).
O 320 E2D ........................
Cessna Aircraft: Cardinal (172 I, 177).
O 320 E2F ........................
M.B.B.: Monsun (BO 209 B), Wassmer Pacific (WA 51).
O 320 E2G ........................
American Aviation Corp.: Traveler.

Piper Aircraft: Cherokee (140).
O 320 E3D ........................
Beech Aircraft: Sport.
IO 320 B2A .......................
Piper Aircraft: Twin Comanche (PA 30).
IO 320 B1C .......................
Hi. Shear: Wing.
IO 320 B1D .......................
Ted Smith Aircraft: Aerostar.
IO 320 C1A .......................
Piper Aircraft: Twin Comanche (PA 30 Turbo).
IO 320 D1A .......................
M.B.B.: Monsun (BO 209 C).
IO 320 D1B .......................
M.B.B.: Monsun (BO 209 C).
IO 320 E1A .......................
M.B.B.: Monsun (BO 209 C).
IO 320 E1B .......................
Bellanca Aircraft.
IO 320 E2A .......................
Champion Aircraft: Citabria.
IO 320 E2B .......................
Bellanca Aircraft.
IO 320 F1A .......................
CAAR Engineering: Carr Midget.
LIO 320 B1A .....................
Piper Aircraft: Twin Comanche (PA 39).
LIO 320 C1A .....................
Piper Aircraft: Twin Comanche (PA 39).
AIO 320 B1B.....................
M.B.B.: Monsun (BO 209 C).
AEIO 320 D1B ..................
Slingsby: T67M Firefly.
AEIO 320 D2B ..................
Hundustan Aeronautics Ltd.: HT 2.

Bellanca Aircraft.
AEIO 320 E1A ..................
Champion Aircraft.

Bellanca Aircraft.
AEIO 320 E1B ..................
Champion Aircraft: Decathalon (8KCAB CS).

Bellanca Aircraft.
AEIO 320 E2B ..................
Champion Aircraft: Decathalon (8KCAB).
O 320 A1A ........................
Riley Aircraft: Riley Twin.

Beech Aircraft: Travel Air (95, B 95).

Piper Aircraft: Comanche (PA 24).

Intermountain Mfg. Co.: Call Air (A 6).

Lake Aircraft: Colonial (C 2, LA 4, 4A or 4P).

Doyn Aircraft: Doyn-Cessna (170B, 172, 172A, 172B).

Mooney Aircraft: Mark "20B"(M 20B).

Earl Horton: Pawnee (Piper PA 25).

Dinfia: Ranquel (1A 51).

Neiva: (1PD 5901).

Regente: (N 591).

Wassmer: Super 4 (WA 50A), Sancy (WA 40), Baladou (WA 40), Pariou (WA 40).

Sud: Gardan (GY 180).

Bolkow: (207).

Partenavia: Oscar (P 66).

Siai-Marchetti: (S 205).

Procaer: Picchio (F 15 A).

S.A.A.B.: Safir (91 D).

Malmo: Vipan (MF 10B).

Aero Boero: AB 180.

Beagle: Airedale (A 109).

DeHavilland: Drover (DHA 3MK3).

Kingsford-Smith: Bushmaster (J5 6).
O 360 A1A ........................
Aero Engine Service Ltd.: Victa (R 2).
O 360 A1AD .....................
S.O.C.A.T.A.: Tabago TB 10.

Piper Aircraft: Comanche (PA 24).

Lake Aircraft: Colonial (LA 4, 4A or 4P).

Doyn Aircraft: Doyn-Beech (Beech 95).

Mooney Aircraft: Master "21"(M 20E), Mark "20B", "20D", (M20B, M20C), Mooney Statesman (M 20G).

Dinfia: Querandi (1A 45).

Wassmer: (WA 50).

Malmo: Vipan (MF1 10).

Cessna Aircraft: Skyhawk.
O 360 A1D ........................
Doyn Aircraft: Doyn-Piper (PA 23 "160").
O 360 A1F6 ......................
Cessna Aircraft: Cardinal.

Cessna Aircraft: Cardinal 177.
O 360 A1F6D ....................
Teal III: TSC (1A3).
O 360 A1G6 ......................
Aero Commander.
O 360 A1G6D ...................
Beech Aircraft: Duchess 76.
O 360 A1H6 ......................
Piper Aircraft: Seminole (PA 44).
O 360 A1LD ......................
Wassmer: Europa WA 52.
O 360 A1P ........................
Aviat: Husky.
O 360 A2A ........................
Center Est Aeronautique: Regente (DR 253). S.O.C.A.T.A.: Rallye Commodore (MS 893). Societe Aeronautique Normande: Mousquetaire (D 140). Bolkow: Klemm (K1 107C). Partenavia: Oscar (P 66). Beagle: Husky (D5 180) (J1 U).
O 360 A2D ........................
Piper Aircraft: Comanche (PA 24), Cherokee "C"(PA 28 "180"). Mooney Aircraft: Master "21"(M 20D), Mark "21"(M 20E).
O 360 A2E ........................
Std. Helicopter.
O 360 A2F ........................
Aero Commander: Lark (100). Cessna Aircraft: Cardinal.
O 360 A2G ........................
Beech Aircraft: Sport.
O 360 A3A ........................
C.A.A.R.P.S.A.N.: (M 23III). Societe Aeronautique Normande: Jodel (D 140C). Robin: Regent (DR400/180), Remorqueur (DR400/180R). R 3170. S.O.C.A.T.A.: Rallye 180GT, Sportavia Sportsman (RS 180). Norman Aeroplace Co.: NAC 1 Freelance. Nash Aircraft Ltd.: Petrel.

S.O.C.A.T.A.: TB 10.
O 360 A3AD .....................
Robin: Aiglon (R 1180T).
O 360 A4A ........................
Piper Aircraft: Cherokee "D"(PA 28 "180").
O 360 A4D ........................
Varga: Kachina.
O 360 A4G ........................
Beech Aircraft: Musketeer Custom III.
O 360 A4K ........................
Grumman American: Tiger. Beech Aircraft: Sundowner 180.
O 360 A4M .......................
Piper Aircraft: Archer II (PA 28 "18"). Valmet: PIK 23.
O 360 A4N ........................
Cessna Aircraft: 172 (Optional).
O 360 A4P ........................
Penn Yan: Super Cub Conversion.
O 360 A5AD .....................
C. Itoh and Co.: Fuji FA 200.
O 360 B2C ........................
SeabirdAviation: SB7L.
O 360 C1A ........................
Intermountain Mfg. Co.: Call Air (A 6).
O 360 C1E ........................
Bellanca Aircraft: Scout (8GCBC CS).
O 360 C1F ........................
Maule: Star Rocket MX 7 180.
O 360 C1G .......................
Christen: Husky (A 1).
O 360 C2B ........................
Hughes Tool Co.: (269A).
O 360 C2D ........................
Hughes Tool Co.: (269A).
O 360 C2E ........................
Hughes Tool Co.: (YHO 2HU) Military. Bellanca Aircraft: Scout (8GCBC FP).
O 360 C4F ........................
Maule: MX 7 180A.
O 360 C4P ........................
Penn Yan: Super Cub Conversion.
O 360 F1A6 ......................
Cessna Aircraft: Cutlass RG.
O 360 J2A .........................
Robinson: R22.
IO 360 B1A .......................
Beech Aircraft: Travel-Air (B 95A). Doyn Aircraft: Doyn-Piper (PA 23 "200").
IO 360 B1B .......................
Beech Aircraft: Travel-Air (B 95B). Doyn Aircraft: Doyn-Piper (PA 23 "200"). Fuji: (FA 200).
IO 360 B1D .......................
United Consultants: See-Bee.
IO 360 B1E .......................
Piper Aircraft: Arrow (PA 28 "180R").
IO 360 B1F .......................
Utva: 75.
IO 360 B2E .......................
C.A.A.R.P. C.A.P. (10).
IO 360 B1F6 .....................
Great Lakes: Trainer.
IO 360 B1G6 .....................
American Blimp: Spector 42.
IO 360 B2F6 .....................
Great Lakes: Trainer.
LO 360 A1G6D .................
Beech Aircraft: Duchess.
LO 360 A1H6 ....................
Piper Aircraft: Seminole (PA 44).
IO 360 E1A .......................
T.R. Smith Aircraft: Aerostar.
IO 360 L2A .......................
Cessna Aircraft: Skyhawk C 172.
IO 360 M1A ......................
Diamond Aircraft: DA 40.

Vans Aircraft: RV6, RV7, RV8
IO 360 M1B ......................
Lancair: 360.
AEIO 360 B1F ..................
F.F.A.: Bravo (200). Grob: G115/Sport-Acro.
AEIO 360 B1G6 ................
Great Lakes.
AEIO 360 B2F ..................
Mundry: CAP 10.
AEIO 360 B4A ..................
Pitts: S 1S.
AEIO 360 H1A ..................
Bellanca Aircraft: Super Decathalon (8KCAB 180).
AEIO 360 H1B ..................
American Champion: Super Decathalon.
VO 360 A1A ......................
Brantly Hynes Helicopter: (B 2).
VO 360 A1B ......................
Brantly Hynes Helicopter: (B 2, B2 A). Military (YHO 3BR).
VO 360 B1A ......................
Brantly Hynes Helicopter: (B 2, B2 A).
IVO 360 A1A .....................
Brantly Hynes Helicopter: (B2 B).

HO 360 B1A .....................
Hughes Tool Co.: (269A).
HO 360 B1B .....................
Hughes Tool Co.: (269A).
HO 360 C1A .....................
Schweizer: (300C).
HIO 360 B1A ....................
Hughes Tool Co.: Military (269 A 1) (TH 55A).
HIO 360 B1B ....................
Hughes Tool Co.: (269A).
HIO 360 G1A ....................
Schweizer: (CB).
O 540 A1A ........................
Rhein-Flugzeugbau: (RF 1).

Piper Aircraft: Comanche (PA 24 "180").

Helio: Military (H 250).
O 540 A1A5 ......................
Yoeman Aviation: (YA 1).
O 540 A1B5 ......................
Piper Aircraft: Aztec (PA 23 "250"), Comanche (PA 24 "250").
O 540 A1C5 ......................
Piper Aircraft: Comanche (PA 24 "250").

Found Bros.: (FBA 2C).
O 540 A1D ........................
Dornier: (DO 28 B1).

Piper Aircraft: Aztec (PA 23 "250"), Comanche (PA 24 "250"), Military Aztec (U 11A).
O 540 A1D5 ......................
Dornier: (DO 28).

Aero Commander: (500).
O 540 A2B ........................
Mid-States Mfg. Co.: Twin Courier (H 500), (U 5).
O 540 A3D5 ......................
Piper Aircraft: Navy Aztec (PA 23 "250").
O 540 B1A5 ......................
Piper Aircraft: Apache (PA 23 "235").

Piper Aircraft: Comanche (PA 24 "250").
O 540 B1B5 ......................
Doyn Aircraft: Doyn-Piper (PA 24 "250").O 540 B1D5 ......................
Wassmer: (WA 421).

Piper Aircraft: Pawnee (PA 25 "235"), Cherokee (PA 28 "235"), Aztec (PA 23 "235").

Intermountain Mfg. Co.: Call Air (A 9).

Rawdon Bros.: Rawdon (T 1).
O 540 B2B5 ......................
S.O.C.A.T.A.: Rallye 235CA.
O 540 B2C5 ......................
Piper Aircraft: Pawnee (PA 25 "235").

Piper Aircraft: Cherokee (PA 28 "235").

Embraer: Corioca (EMB 710).

S.O.C.A.T.A.: Rallye 235GT, Rallye 235C
O 540 B4B5 ......................
Maule: Star Rocket (MX 7 235), Super Rocket (M 6 235), Super Std. Rocket (M 7 235).

Piper Aircraft: Comanche (PA 24 "260").

Aviamilano: Flamingo (F 250).
O 540 E4A5 ......................
Siai-Marchetti: (SF 260), (SF 208).

Britten-Norman: (BN 2).
O 540 E4B5 ......................
Piper Aircraft: Cherokee Six (PA 32 "260").

O 540 E4C5 ......................
Pilatus Britten-Norman: Islander (BN 2A 26), Islander (BN 2A 27), Islander II (BN 2B 26), Islander (BN 2A 1),Trislander (BN 2A Mark III 2).

Omega Aircraft: (BS 12D1).
O 540 F1B5 ......................
Robinson: (R 44).
O 540 G1A5 ......................
Piper Aircraft: Pawnee (PA 25 "260").
O 540 H1B5D ...................
Aero Boero: 260.

Embraer: Impanema "AG".
O 540 H2A5 ......................
Gippsland: GA 200.
O 540 H2B5D ...................
Aero Boero: 260.
O 540 J1A5D ....................
Maule: Star Rocket (MX 7 235), Super Rocket (M 6 235), Super Std. Rocket (M 7 235).
O 540 J3A5 .......................
Robin: R 3000/235.
O 540 J3A5D ....................
Piper Aircraft: Dakota (PA 28 236).
O 540 J3C5D ....................
Cessna Aircraft: Skylane RG.
O 540 L3C5D ....................
Cessna Aircraft: TR 182, Turbo Skylane RG.
O 540 C1B5 ......................
Piper Aircraft: Aztec B (PA 23 "250"), Comanche (PA 24 "250").
IO 540 C1C5 .....................
Riley Aircraft: Turbo-Rocket.

Piper Aircraft: Aztec C (PA 23 "250"), Aztec F.

Wassmer: (WA 421).

Avions Pierre Robin: (HR100/250).

Bellanca Aircraft: Aries T 250.
IO 540 C4B5 .....................
Aerofab: Renegade 250.
IO 540 C4D5 .....................
S.O.C.A.T.A.: TB 20.
IO 540 C4D5D ..................
S.O.C.A.T.A.: Trinidad TB 20.

Piper Aircraft: Comanche (PA 24 "260").
IO 540 D4A5 .....................
Siai-Marchetti: (SF 260).
IO 540 D4B5 .....................
Cerva: (CE 43 Guepard).
IO 540 J4A5 ......................
Piper Aircraft: Aztec (PA 23 "250").
IO 540 R1A5 .....................
Piper Aircraft: Comanche (PA 24).
IO 540 T4A5D ...................
General Aviation: Model 114.
IO 540 T4B5 .....................
Commander: 114B.
IO 540 T4B5D ...................
Rockwell: 114.
IO 540 T4C5D ..................
Lake Aircraft: Seawolf.

Maule: MT 7 260, M 7 260.
IO 540 V4A5 .....................
Aircraft Manufacturing Factory.
IO 540 V4A5D ..................
Brooklands: Scoutmaster.
IO 540 W1A5 ....................
Maule: MX 7 235, MT 7 235, M7 235.
IO 540 W1A5D .................
Maule: Star Rocket (MX 7 235), Super Rocket (M 6 235), Super Std. Rocket (M 7 235).
IO 540 W3A5D .................
Schweizer: Power Glider.

Christen: Pitts (S 2S), (S 2B). Siai-Marchetti: SF 260.

H.A.L.: HPT 32.
AEIO 540 D4A5 ................
Slingsby: Firefly T3A.

Moravan: Zlin-50L.
AEIO 540 D4B5 ................
H.A.L.: HPT 32.
AEIO 540 D4D5 ................
Burkhart Grob: Grob G, 115T Aero.
TIO 540 C1A .....................
Piper Aircraft: Turbo Aztec (PA 23 250).
TIO 540 K1AD ..................
Piper Aircraft.
TIO 540 AA1AD ................
Aerofab Inc.: Turbo Renegade (270).
TIO 540 AB1AD ................
S.O.C.A.T.A.: Trinidad TC TB 21.
TIO 540 AB1BD ................
Schweizer.
TIO 540 AF1A ...................
Mooney Aircraft: "TLS"M20M.
TIO 540 AG1A ..................
Commander Aircraft: 114TC.
TIO 540 AK1A ..................
Cessna Aircraft: Turbo Skylane T182T.
LTIO 540 K1AD ................
Piper Aircraft.

Unsafe Condition

(d) This AD results from reports of applicability errors found in AD 2005-26-10. We are issuing this AD to prevent loss of engine power due to cracks in the cylinder assemblies and possible engine failure caused by separation of a cylinder head.

Compliance

(e) You are responsible for having the actions required by this AD performed within the compliance times specified unless the actions have already been done.

Engines Not Overhauled or Repaired Since New

(f) If your engine has not been overhauled or had any major repair since new, no further action is required.

Engines Overhauled or Repaired Since New

(g) If your engine was overhauled or repaired since new, do the following:
(1) Determine if ECi cylinder assemblies, P/N AEL65102 series "Classic Cast", having casting head markings EC 65099-REV-1 and SNs 1 through 9879 (SN may have an "L" prefix for a long reach spark plug) are installed on your engine, as follows:

(i) Inspect the engine log books and maintenance records for reference to the subject ECi cylinder assemblies.

(ii) If the engine log books and maintenance records did not record the P/N and SN of the cylinder assemblies, visually inspect the cylinder assemblies and verify the P/N and SN of the cylinder assemblies.

(2) If the cylinder assemblies are not ECi, P/N AEL65102 series "Classic Cast", having casting head markings EC 65099-REV-1, no further action is required.

(3) If any cylinder assembly is an ECi P/N AEL65102 series "Classic Cast", having casting head markings EC 65099-REV-1 and a SN 1 through 9879 (SN may have an "L" prefix for a long reach spark plug), do the following:

(i) If the cylinder assembly has fewer than 800 operating hours- in-service (HIS) on the effective date of this AD, replace the cylinder assembly at no later than 800 operating HIS. Noaction is required until the operating HIS reaches 800 hours.

(ii) If the cylinder assembly has 800 operating HIS or more on the effective date of this AD, replace the cylinder assembly within 60 operating HIS after the effective date of this AD.

Definition of a Replacement Cylinder Assembly

(h) For the purpose of this AD, a replacement cylinder assembly is defined as follows:

(1) A serviceable cylinder assembly made by Lycoming Engines.

(2) A serviceable FAA-approved, Parts Manufacturer Approval cylinder assembly from another manufacturer.

(3) A serviceable ECi cylinder assembly, P/N AEL65102 series, "Titan", having casting P/N AEL85099.

(4) A serviceable ECi cylinder assembly, P/N AEL65102 series "Classic Cast", having casting head markings
EC 65099-REV-1, that has a SN 9880 or higher (SN may have an "L" prefix for a long reach spark plug).

Prohibition of Cylinder Assemblies, P/N AEL65102 Series "Classic Cast", Having Casting Head Markings EC 65099-REV-1 and SNs 1 Through 9879

(i) After the effective date of this AD, do not install any ECi cylinder assembly, P/N AEL65102, having casting head markings EC 65099-REV-1 that has a SN 1 through 9879 (SN may have an "L" prefix for a long reach spark plug), onto any engine.

Alternative Methods of Compliance

(j) The Manager, Special Certification Office, has the authority to approve alternative methods of compliance for this AD if requested using the procedures found in 14 CFR 39.19.

Related Information

(k) ECi Service Bulletin No. 05-08, Revision 2, dated February 28, 2006, pertains to the subject of this AD.

The FAA proposed to amend 14 CFR part 39 with a proposed AD. The proposed AD applies to Lycoming Engines models 320, 360, and 540 series, "Parallel Valve" reciprocating engines, with certain ECi cylinder assemblies, P/N AEL65102 series "Classic Cast", installed. We published the proposed AD in the Federal Register on February 24, 2006 (71 FR 9480). That action proposed to require the same actions as AD 2005-26-10, but would replace the "Engine Models" Table 1 and "Engines Installed On, But Not Limited To" Table 2 with corrected tables. Also, that action proposed to correct the casting part number.

Examining the AD Docket

You may examine the docket that contains the AD, any comments received, and any final disposition in person at the Docket Management Facility Docket Office between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The Docket Office (telephone (800) 647-5227) is located on the plaza level of the Department of Transportation Nassif Building at the street address stated in ADDRESSES. Comments will be available in the AD docket shortly after the DMS receives them.

Comments

We provided the public the opportunity to participate in the development of this AD. We have considered the comments received.

Request To Change All References to Casting P/N AEL65099

One commenter requests that we change all references to casting P/N AEL65099 to read "casting head markings EC 65099-REV-1" to more accurately describe the actual markings. We agree, and made the reference changes in the AD.

Request To Explain Another Set of Numbers on the Cylinder

The same commenter requests that we explain that the set of numbers appearing on the cylinder below and to the left of the SN, in the form of "12345-67" is not used for determining applicability. We agree, and have added a statement to point this out in the AD.

Update to Related Information

Under paragraph (k), Related Information, we updated the reference to ECi Service Bulletin No. 05-08, Revision 1, dated December 29, 2005, to Revision 2, dated February 28, 2006.

Conclusion

We have carefully reviewed the available data, including the comments received, and determined that air safety and the public interest require adopting the AD with the changes described previously. We have determined that these changes will neither increase the economic burden on any operator nor increase the scope of the AD.

Costs of Compliance

We estimate that 7,557 ECi cylinder assemblies are installed on Lycoming engines in the United States. We estimate that it will take about two workhours per engine to perform the aircraft inspections of the cylinder assemblies for applicability, and that the average labor rate is $65 per workhour. From the Lycoming Engines "Removal and Installation Labor Allowance Guidebook", dated May 2000, the complete cylinder replacement for a four cylinder engine takes 12 hours, while the complete cylinder replacement for a six cylinder engine takes 16 hours. Required parts will cost about $1,000 per cylinder assembly. Based on these figures, we estimate that the total cost of the AD to U.S. operators to be $9,152,140. ECi indicated that they might give operators and repair stations credit for returned cylinder assemblies toward the purchase of new ECi cylinder assemblies.

Authority for This Rulemaking

Title 49 of the United States Code specifies the FAA's authority to issue rules on aviation safety. Subtitle I, section 106, describes the authority of the FAA Administrator. Subtitle VII, Aviation Programs, describes in more detail the scope of the Agency's authority.

We are issuing this rulemaking under the authority described in subtitle VII, part A, subpart III, section 44701, "General requirements." Under that section, Congress charges the FAA with promoting safe flight of civil aircraft in air commerce by prescribing regulations for practices, methods, and procedures the Administrator finds necessary for safety in air commerce. This regulation is within the scope of that authority because it addresses an unsafe condition that is likely to exist or develop on products identified in this rulemaking action.

Regulatory Findings

We have determined that this AD will not have federalism implications under Executive Order 13132. This AD will not have a substantial direct effect on the States, on the relationship between the national government and the States, or on the distribution of power and responsibilities among the various levels of government.

For the reasons discussed above, I certify that this AD:

(1) Is not a "significant regulatory action" under Executive Order 12866;

(2) Is not a "significant rule" under DOT Regulatory Policies and Procedures (44 FR 11034, February 26, 1979); and

(3) Will not have a significant economic impact, positive or negative, on a substantial number of small entities under the criteria of the Regulatory Flexibility Act.

We prepared a summary of the costs to comply with this AD and placed it in the AD Docket. You may get a copy of this summary at the address listed under ADDRESSES.

List of Subjects in 14 CFR Part 39

Air transportation, Aircraft, Aviation safety, Safety.

Adoption of the Amendment

Accordingly, under the authority delegated to me by the Administrator, the Federal Aviation Administration amends 14 CFR part 39 as follows:

PART 39--AIRWORTHINESS DIRECTIVES

1. The authority citation for part 39 continues to read as follows:

Authority: 49 U.S.C. 106(g), 40113, 44701.

Sec. 39.13 [Amended]

2. The FAA amends Sec. 39.13 by removing Amendment 39-14431 (70 FR 76385, December 27, 2005), and by adding a new airworthiness directive, Amendment 39-14632, to read as follows:

You may examine the AD docket on the Internet at http://dms.dot.gov or in Room PL-401 on the plaza level of the Nassif Building, 400 Seventh Street, SW., Washington, DC.

Peter Hakala, Aerospace Engineer, Special Certification Office, FAA, Rotorcraft Directorate, 2601 Meacham Blvd., Fort Worth, TX 76193; telephone (817) 222-5145; fax (817) 222- 5785.

["AIR-720: Operational Safety Branch"]