Airworthiness Directive · Amendment 39-16925 · Cessna Aircraft Company Airplanes
Cessna Aircraft Company Airplanes
This AD applies to the following Cessna Aircraft Company airplanes, certificated in any category:
(1) Group 1: Model 172R, serial numbers (S/N) 17281188 through 17281390;
(2) Group 2: Model 172S, S/N 172S9491 through 172S10489;
(3) Group 3: Model 172R, S/N 17281391 through 17281572; and
(4) Group 4: Model 172S, S/N 172S10490 through 172S11073.
We are superseding an existing airworthiness directive (AD) for certain Cessna Aircraft Company (Cessna) Models 172R and 172S airplanes. That AD currently requires you to inspect the fuel return line assembly for chafing; replace the fuel return line assembly if chafing is found; and inspect the clearance between the fuel return line assembly and both the right steering tube assembly and the airplane structure, adjusting as necessary. Since we issued that AD, we have received a field report of a fuel return line chafing incident on a Cessna Model 172 airplane with a serial number (S/N) that was not included in the AD. This AD retains the actions of the current AD and adds S/Ns to the Applicability section of the AD. Chafing of the fuel return line assembly could lead to fire. This new AD requires the actions of the current AD and adds S/Ns to the Applicability section of the AD. We are issuing this AD to correct the unsafe condition on these products.
(1) For Group 1 and Group 2 Airplanes: Within the next 100 hours time-in-service (TIS) after March 6, 2008 (the effective date retained from AD 2008-03-02) or within the next 12 months after March 6, 2008 (the effective date retained from AD 2008-03-02), whichever occurs first, inspect the fuel return line assembly (Cessna part number (P/N) 0500118-49) for chafing. Do the inspection following Cessna Service Bulletin SB07-28-01, dated June 18, 2007; or Cessna Service Bulletin SB07-28-01, Revision 1, dated September 22, 2011.
(2) For Group 3 and Group 4 Airplanes: Within the next 100 hours TIS after March 13, 2012 (the effective date of this AD) or within the next 12 months after March 13, 2012 (the effective date of this AD), whichever occurs first, inspect the fuel return line assembly (Cessna P/N 0500118-49) for chafing. Do the inspection following Cessna Service Bulletin SB07-28-01, Revision 1, dated September 22, 2011.
For All Airplanes: Before further flight after the inspection required in paragraph (g)(1) or (g)(2) of this AD where evidence of chafing was found, replace the fuel return line assembly (Cessna P/N 0500118-49). Do the replacement following Cessna Service Bulletin SB07-28-01, dated June 18, 2007; or Cessna Service Bulletin SB07-28-01, Revision 1, dated September 22, 2011.
For All Airplanes: Before further flight after the inspection required in paragraph (g)(1) or (g)(2) of this AD if no chafing is found or after the replacement required in paragraph (h) of this AD, whichever of the previous situations applies, inspect for a minimum clearance of 0.5 inch between the following parts throughout the entire range of copilot rudder pedal travel. If less than 0.5 inch clearance is found, before further flight, adjust the clearance. Follow paragraph 6 of the Instructions section of Cessna Service Bulletin SB07-28-01, dated June 18, 2007; or Cessna Service Bulletin SB07-28-01, Revision 1, dated September 22, 2011. This AD requires a minimum clearance of 0.5 inch. The requirements of this AD take precedence over the actions required in the service information.
(1) The fuel return line assembly (Cessna P/N 0500118-49) and the steering tube assembly (Cessna P/N MC0543022-2C); and
(2) The fuel return line assembly (Cessna P/N 0500118-49) and the airplane structure.
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.
