Airworthiness Directive · Amendment 39-15020 · Cessna Aircraft Company Models 172R, 172S, 182T, T182T, 206H, and T206H Airplanes
Cessna Aircraft Company Models 172R, 172S, 182T, T182T, 206H, and T206H Airplanes
This AD applies to the following airplane models and serial numbers that are certificated in any category:
| Model | Serial Nos. |
|---|---|
| (i) 172R | 17281244 through 17281364, 17281366 through 17281372, 17281374 through 17281376, and 17281379. |
| (ii) 172S | 172S9809 through 172S10349, 172S10351 through 172S10374, 172S10376 through 172S10423, 172S10425 through 172S10426, 172S10428 through 172S10430, 172S10432 through 172S10444, 172S10446 through 172S10450, and 172S10452 through 172S10454. |
| (iii) 182T | 18281527 through 18281889, 18281892, 18281895, 18281897, 18281899, 18281901, and 18281904. |
| (iv) T182T | T18208381 through T18208659, T18208661, T18208663 through T18208678, T18208680 through T18208686, T18208689, and T18208690. |
| (v) 206H | 20608231 through 20608285. |
| (vi) T206H | T20608515 through T20608662, T20608664 through T20608697, T20608699 through T20608714, and T20608717. |
The FAA is adopting a new airworthiness directive (AD) to supersede AD 2006-17-04, which applies to certain Cessna Aircraft Company (Cessna) Models 172R, 172S, 182T, T182T, 206H, and T206H airplanes. AD 2006-17-04 currently requires you to inspect the two end fittings on each of the flexible fuel hoses located in the engine compartment for the correct torque values, and, if any incorrect torque values are found during the inspection, tighten the hose end fittings to the correct torque values. This AD results from four reports of loose fuel lines connected to the fuel servo or fuel flow transducer. Two reports were of in-flight engine failure on a Model T182T airplane. A third report was of in-flight engine failure on a Model 206H airplane. A fourth report was of a Model 172S airplane losing engine power on final approach. Consequently, this AD would require you to establish the correct torque values of the end fittings on fuel hoses for certain Cessna Models 172R, 172S, 182T, T182T, 206H, and T206H airplanes. This AD clarifies that the torque values need to be physically established and visual inspection only is not sufficient. We are issuing this AD to detect and correct potential loss of fuel flow, which may result in partial or complete loss of engine power and/or uncontrolled engine compartment fire due to fuel leakage forward of the firewall.
To address this problem, you must do the following, unless already done:
| Actions | Compliance | Procedures |
|---|---|---|
| (1) For all airplanes not equipped with the Garmin G1000 System: Establish the correct torque values of the end fittings on each of the following hoses in the engine compartment: (i) Fuel strainer to engine fuel pump. (ii) Engine fuel pump to fuel injector servo (except T206H). | Within the next 5 hours time-in-service (TIS) after May 2, 2007 (the effective date of this AD). | Follow Cessna Service Bulletin No. SB07-71-01, Revision 1, dated March 16, 2007; the procedures of the appendix to this AD; and the torque values from the table Torque Values for Hose End Fittings in the appendix to this AD. |
| (iii) T206H only: Engine fuel pump to the union at the aft vertical cooling baffle. | ||
| (iv) T206H only: Union at the aft vertical cooling baffle to the fuel injector servo. | ||
| (v) Fuel injector servo to fuel manifold valve (except turbo models). | ||
| (vi) Turbo models only: Fuel injector servo to fuel flow transducer. | ||
| (vii) Turbo models only: Fuel flow transducer to fuel manifold valve. | ||
| (viii) Fuel injector servo fuel return to firewall fitting. | ||
| (2) For all airplanes equipped with the Garmin G1000 System: Establish the correct torque values of the end fittings on each of the following hoses in the engine compartment: (i) Fuel strainer to engine fuel pump. (ii) Engine fuel pump to fuel injector servo (except T206H). | Within the next 5 hours TIS after May 2, 2007 (the effective date of this AD). | Follow Cessna Service Bulletin No. SB07-71-01, Revision 1, dated March 16, 2007; the procedures of the appendix to this AD; and the torque values from the table Torque Values for Hose End Fittings in the appendix to this AD. |
| (iii) T206H only: Engine fuel pump to the union at the aft vertical cooling baffle. | ||
| (iv) T206H only: Union at the aft vertical cooling baffle to the fuel injector servo. | ||
| (v) Fuel injector servo to fuel flow transducer. | ||
| (vi) Fuel flow transducer to fuel manifold valve. | ||
| (vii) Fuel injector servo fuel return to firewall fitting. |
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
