Airworthiness Directive · Amendment 39-9927 · Airbus SAS, Alliedsignal Inc, The Boeing Company Appliances
Airbus SAS, Alliedsignal Inc, The Boeing Company Appliances
This AD applies to Airbus SAS, Alliedsignal Inc, The Boeing Company BAC 1-11 200 Series, BAC 1-11 400 Series, Auxiliary Power Units, 707-100 Long Body, 707-100B Long Body, 707-100B Short Body, 707-200, 707-300 Series, 707-300B Series, 707-300C Series, 707-400 Series, 727-100 Series, 727-100C Series, 727-200 Series, 727-200F Series, 727 Series, 727C Series, 737-100 Series, 737-200 Series, 737-200C Series, 737-300 Series, 737-400 Series, 737-500 Series, 737-600 Series, 737-700 Series, 737-700C Series, 737-800 Series, 737-900 Series, DC-8-71, DC-8-71F, DC-8-72, DC-8-72F, DC-8-73, DC-8-73F, DC-9-11, DC-9-12, DC-9-13, DC-9-14, DC-9-15, DC-9-15F, DC-9-21, DC-9-31, DC-9-32, DC-9-32 (VC-9C), DC-9-32F, DC-9-32F (C-9A), DC-9-32F (C-9B), DC-9-33F, DC-9-34, DC-9-34F, DC-9-41, DC-9-51, DC-9-81 (MD-81), DC-9-82 (MD-82), DC-9-83 (MD-83), DC-9-87 (MD-87), MD-88.
The models as the FAA's AD index lists them. The serial ranges, installed parts and exceptions are in the AD itself: read it at the FAA.
This amendment supersedes an existing airworthiness directive (AD), applicable to AlliedSignal Inc. (formerly Garrett Auxiliary Power Division) GTCP85 Series auxiliary power units (APUs), that currently requires removing the existing turbine wheel shroud and installing one constructed of Hastelloy "S" material, or installing a containment augmentation ring. This amendment deletes the option of installing a turbine shroud constructed of Hastelloy "S" material. This amendment is prompted by a report of insufficient APU containment capability with the Hastelloy "S" shroud alone installed. The actions specified by this AD are intended to prevent turbine shroud fragments from exiting the APU and puncturing the APU compartment, which could result in reduced fire extinguishing capability in the APU compartment.
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
Appliances and equipment
