New AD Just a heads up!
(c) Applicability
This emergency AD applies to -B, BB, D, DB, E,
EB, J, JB, K, KB, N, NB, UB, VB; TSIO-550-K; TSIOF-550-K; IO-550-N (Turbo-normalized only;
STC SE10589SC); with a starter adapter part number (P/N) 642085A17, 642085A19, 642085A20,
642085-1A1, and R-642085A17, installed, where the engine was manufactured between January 1,
2011 and November 20, 2011, or, where a replacement new or rebuilt starter adapter was purchased
and installed between January 1, 2011 and November 20, 2011.
(d) Unsafe Condition
This AD was prompted by 5 reports received of fractures in starter adapter shaft gears in
certain part number (P/N) CMI starter adapters. We are issuing this AD to prevent failure of the
starter adapter gear shaft, leading to an inoperable oil scavenge pump and engine in-flight shutdown.