AD NUMBER: 2005-23-11
SUBJECT: Airworthiness Directive 2005-23-11
FAA is adopting a new airworthiness directive (AD) for Hamilton
Sundstrand Power Systems (formerly Sundstrand Power Systems)
auxiliary power units (APUs) models T-62T-46C2, T-2T-46C2A,
T-62T-46C3, T-62T-46C7, and T-62T-46C7A, with compressor impeller
assembly, part number (P/N) 4502020 or 4502020A,
This AD requires removal from
service of those compressor impeller assemblies at reduced service
This AD results from two reports of
uncontained failures of compressor impeller assemblies.
We are issuing this AD to prevent an
uncontained APU failure and damage to the airplane.