Service difficulty report · Gearbox · Hughes 369D

Difficulty date
November 18, 2003
Submitted
January 5, 2004
Operation
General aviation
Make and model
Hughes 369D
Engine
Allsn 250C20B
Part
Gearbox
Part number
369D25400
Part serial
0768
Condition
Corroded
Location
Tail Rotor
Stage of operation
IN
How discovered
V
Nature of condition
O
Precautionary procedure
K

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

(CAN) UNIT RECEIVED TO INSPECT FOR REPORTED METAL GENERATION. THE FOLLOWING WAS FOUND AT DISASSEMBLY. I/P GEAR 369D25434 U/S DUE TO SEVERE CORROSION PITS, O/P GEAR 369D 25430 ALSO PITTED BUT POLISHABLE. THE DUPLEX BEARINGS 369D25420 HAD NO CLAMP UP(.001-.003 INCH REQUIRED), THEY SPUN IN THE RETAINER 369D25409. ALSO THE O/P ALIGN . BEARING 369D25419 WAS LOOSE IN ITS' RETAINER (SPINNING). THIS UNIT WAS O/H THEN REPAIRED FOR METAL GEN. 3 TIMES BY REPAIR FACILITY FAA STATION.