AD 69-19-03 ACTIVE

69-19-03 DOWTY ROTOL: Amdt. 39-837. Applies to Dowty Rotol Propellers Type Nos. (c) R.130/4-20-4/12E and (c) R.148/4-20-4/21E installed on British Aircraft Corporation (Vickers) Viscount 744 and 745D airplanes.

Compliance required as indicated, unless already accomplished.

(a) For Type No. (c) R.130/4-20-4/12E propellers installed on Model 745D, Viscount airplanes and for Type No. (c) R.148/4-20-4/21E propellers installed on Model 744 Viscount airplanes, accomplish the following:

(1) For propellers having hubs with 15,000 or more hours' time in service on the effective date of this AD, accomplish the inspection required by paragraph (3) of this section within the next 400 hours' time in service after the effective date of this AD, or before 3,000 hours' time in service since the last inspection, whichever occurs later. Thereafter, repeat this inspection at intervals not to exceed 3,000 hours' time in service from the last inspection.

(2) For propellers having hubs with less than 15,000 hours' time in service on the effective date of this AD, accomplish the inspection required by paragraph (3) of this section before 3,000 hours' time in service has accumulated since the last inspection, or before the accumulation of a total of 15,400 hours' time in service, whichever occurs later. Thereafter, repeat this inspection at intervals not to exceed 3,000 hours' time in service from the last inspection.

(3) Inspect the hub arm threads including binocular inspection and crack testing in accordance with Dowty Rotol Limited Service Bulletin No. 61-608, Revision 1, dated June 1968, or later ARB-approved issue, or an FAA-approved equivalent method. If cracked threads are detected during any inspection, before further flight, replace the propeller hub with a serviceable part of the same part number.

(b) For Hub and Driving Center Assembly P/Nos. RA.48546, RA.59601, and RA.59602 installed on propellers having serial numbers listed in paragraph (c) accomplish the following:

(1) Remove from service all hub and driving center assemblies having 20,000 or more hours' time in service on the effective date of this AD within the next 400 hours' time in service after the effective date of this AD.

(2) Remove from service all hub and driving center assemblies having less than 20,000 hours' time in service on the effective date of this AD, within the next 400 hours' time in service after the effective date of this AD, or upon the accumulation of a total of 20,000 hours time in service, whichever occurs later.

(c) Propeller Serial Numbers

DRG.12/61
99241
99381
99568
99749
102071
DRG.13/61
99244
99386
99573
99752
102073
DRG.15/61
99266
99388
99575
99754
102148
574
99267
99395
99577
99759
102149
5733
99268
99396
99578
99766
102152
57265
99269
99397
99579
99771
102166
57268
99270
99399
99580
99772
102167
98338
99272
99403
99587
99784
102168
99180
99275
99405
99594
99791
102170
99186
99276
99407
99596
99800
102184
99187
99278
99409
99597
99804
102257
99190
99281
99410
99600
100024
102259
99191
99283
99411
99603
100025
102349
99198
99284
99413
99606
100040
102489
99207
99323
99417
99609
101579

99211
99330
99427
99613
101584

99217
99337
99429
99614
101586

99218
99339
99434
99615
101804

99220
99341
99437
99617
101929

99221
99352
99440
99620
101985

99222
99353
99443
99621
101986

99224
99368
99468
99741
101987

99231
99369
99472
99742
102041

99235
99375
99546
99743
102046

99239
99377
99557
99745
102052

(d) For hub and driving center assembly having P/Nos. listed in paragraph (e), accomplish the following:

(1) Remove from service all hub and driving center assemblies having 30,000 or more hours' time in service on the effective date of this AD, within the next 400 hours' time in service after the effective date of this AD.

(2) Remove from service all hub and driving assemblies having less than 30,000 hours' time in service on the effective date of this AD within the next 400 hours' time in service after the effective date of this AD, or upon the accumulation of a total of 30,000 hours' time in service, whichever occurs later.

(e) Hub and Driving Center Assembly Part Numbers

RA41744
RA47436
RA44761
RA47436/2
RA44761/1
RA47436/4
RA44761/2
RA47592
RA44761/3
RA48546
RA44761/4
RA49557
RA44761/5
RA56345
RA45155
RA58184
RA45155/1
RA59601
RA45155/2
RA59602

This amendment becomes effective October 6, 1969.