Service difficulty report · O-Ring · Hughes 369D

Difficulty date
January 26, 2014
Submitted
March 12, 2015
Operation
General aviation
Make and model
Hughes 369D
Aircraft time
17,179 hours
Engine
Allsn 250C20B
Part
O-Ring
Condition
Missing
Location
Clutch
Stage of operation
IN
How discovered
9
Nature of condition
K
Precautionary procedure
K

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

What was found

(CAN) THE OVER RUNNING CLUTCH WAS PURCHASED AS AN EXCHANGE UNIT. THIS UNIT WAS INSTALLED AT TTAF 16552.9 HRS. THE INSPECTION CRITERIA IS A VISUAL OIL CHECK EACH 100 HRS, 300 HR HOOK TIME INSPECTION AND A 1800 HR OVERHAUL PERIOD. THIS UNIT AT INSTALL WAS TSO OF 0.0. THE OIL VISUAL CHECK WAS PERFORMED AT 16569.3 HRS 16.4 HRS AFTER INSTALLATION. ANOTHER 100 HR INSPECTION WAS PERFORMED AT 16667.7, 98.4 HRS AFTER THE PREVIOUS INSPECTION. THE CLUTCH WAS VERY HOT AND UPON INSPECTION DETERMINED THAT THERE WAS NO OIL PRESENT IN THE CLUTCH. THE CLUTCH WAS REMOVED AND REPLACED. UPON INSPECTION OF THE CLUTCH IT WAS DETERMINED THAT THE `O` RING BETWEEN THE CLUTCH HOUSING HALVES WAS MISSING.