Airworthiness Directive · Amendment 39-10306 · Cessna Aircraft Company Model 172R Airplanes
Cessna Aircraft Company Model 172R Airplanes
Model 172R airplanes (serial numbers 17280001 through 17280305), certificated in any category, that are equipped with an Aeroquip engine exhaust muffler (part number 00624- NH4000011-10 71379 0554011-2).
This document publishes in the Federal Register an amendment adopting Airworthiness Directive (AD) 98-02-05, which was sent previously to all known U.S. owners and operators of Cessna Aircraft Company (Cessna) Model 172R airplanes. This AD requires de-activating the cabin heating system until the engine exhaust muffler can be replaced, and fabricating and installing a placard within the pilot's clear view, using \1/8\-inch letters with the following words: ``CABIN HEATER INOPERATIVE.'' Inadequate or failed weldments that are leaking exhaust gas (including carbon monoxide) from the muffler into the airplane's cabin and cockpit area prompted this action. The actions specified by this AD are intended to prevent carbon monoxide gas from entering the airplane's cabin heating system and cabin, which, if not corrected, could result in passenger and pilot injury with consequent loss of control of the airplane.
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.
Aircraft
