71-24-04 CESSNA: Amdt. 39-1340. Applies to following airplanes:
MODELS
SERIAL NUMBERS AFFECTED
177
661, 17700001 and 17700003 thru 17701164
206
206-0001 thru 206-0275
U206
U206-0276 thru U206-0437
P206
P206-0002 thru P206-0160
U206A
U206-0438 thru U206-0656
P206A
P206-0161 thru P206-0306
TU206A
U206-0487 thru U206-0656
P206B
P206-0307 thru P206-0419
TU206B
U206-0657 thru U206-0914
TP206A
P206-191 thru P206-0306
TP206B
P206-0307 thru P206-0419
U206B
U206-0657 thru U206-0914
P206C, TP206C
P206-0420 thru P206-0519
U206C, TU206C
U206-0915 thru U206-1234
210D
21058221 thru 21058510
210E
21058511 thru 21058715
T210F
T210-0001 thru T210-0197
210F
21058716 thru 21058818
T210G
T210-0198 thru T210-0307
210G
21058819 thru 21058936
T210H
T210-0307 thru T210-0392
210H
21058937 thru 21059062
336
633, 636, 336-001 thru 336-0195
337
337-0002 thru 337-0239
337A
337-0240 thru 337-0525 (except 337-0306 and 337-0470)
337B
337-0001, 337-0470, 337-0526 thru 337-0755
T337B
337-0001, 337-0526 thru 337-0755 (except 337-0569)
337C, T337C
337-0756 thru 337-0978
Compliance: Required as indicated, unless already accomplished.
To detect leakage of flammable fluids from flexible hose assemblies in the engine compartment within 100 hours' time in service after the effective date of this AD and thereafter at intervals not to exceed 100 hours' time in service, accomplish the following:
A. Visually, or by any other method approved by FAA, inspect fuel lines as follows:
1. Pressurize the fuel lines with boost pump operating in high position. When accomplishing this test, the mixture control should be in the idle cutoff position.
2. With fuel lines pressurized, examine all flexible hose exteriors in the engine compartment for evidence of fuel stains, wetness, or leakage.
3. After pressure testing fuel hoses, allow sufficient time for excess fuel to drain overboard from the engine manifold before attempting an engine start.
B. Visually, or by any other method approved by the FAA, inspect oil lines for evidence of wetness or leakage.
C. If, as a result of the inspections required by Paragraphs A or B, fuel and/or oil stain, wetness or leaking is found, replace with a serviceable hose assembly.
D. Inspections required by Paragraphs A and B will no longer be required when hose assemblies are replaced with assemblies having a Cessna dated metal tag attached. TSO-C53a Type C approved hose assemblies are also acceptable for this replacement. (See Note 1)
NOTE 1: This does not preclude continued inspections of this area as required by FAR 91.
NOTE: Cessna Service Letter SE71-7, Supplement No. 1 dated November 3, 1971, covers this subject.
The above airplanes use Aeroquip 601 series or Stratoflex 156 series hose assemblies available under Cessna P/N S1236-x-xxxx. The hose assemblies are identified by a steel braided exterior.
This amendment becomes effective November 23, 1971.