Issues Found With Certain First Stage Reduction Sun Gears
The FAA has sent a notice of an emergency AD (2011-20-51) to
owners and operators of Pratt & Whitney Canada PT6A-15AG, -27,
-28, -34, -34AG, -34B, and -36 series turboprop engines. The move
was prompted by failures of certain first stage reduction sun
gears, manufactured by Timken Alcor Aerospace Technologies,
Inc.