Airworthiness Directive · Amendment 39-12242 · McDonnell Douglas Model DC-9-32 Series Airplanes Modified Per Supplemental Type Certificate SA4371NM
McDonnell Douglas Model DC-9-32 Series Airplanes Modified Per Supplemental Type Certificate SA4371NM
Model DC-9-32 series airplanes modified per Hexcel Supplemental Type Certificate (STC) SA4371NM, as listed in Hexcel Service Bulletin 110000-25-001, dated March 31, 2000; certificated in any category.
This amendment adopts a new airworthiness directive (AD), applicable to all McDonnell Douglas Model DC-9-32 series airplanes modified per Supplemental Type Certificate SA4371NM, that requires an inspection to determine if certain ground wires on the water heater of each lavatory are installed, and corrective action, if necessary. The actions specified by this AD are intended to detect improper grounding of a water heater, which, coupled with an internal short in the water heater, could result in heat or smoke damage or a fire on the airplane. This action is intended to address the identified unsafe condition.
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.
