Service difficulty report · Fan · Beech H90

Difficulty date
June 19, 2017
Submitted
January 17, 2018
Operation
General aviation
Make and model
Beech H90
Aircraft serial
LL56
Part
Fan
Part number
A189951
Condition
Separated
Location
Ac System
Part time
22 hours
Component
Motor
Component part number
1003840725
Stage of operation
CR
How discovered
O
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

AIRCREW REPORTED AIR-CONDITIONING INOPERABLE. MAINTENANCE TROUBLESHOOTING REVEALED THE A/C COMPRESSOR DRIVE MOTOR FAN TO HAVE SPUN FREE/SEPARATED FROM ITS DRIVE BEARING MOUNT. NO CHATTERING OR VIBRATIONS WERE REPORTED. OTHER DAMAGE NOTED AFTER REMOVAL WAS WEAR MARKS ON THE EDGES OF THE FAN BLADES AND ONE BLADE HAD A CRACK. IT IS UNKNOWN WHAT ORDER THE DAMAGE OCCURRED IN.

More about the Beech H90 (T-44A)