Service difficulty report · Lever · Mtsbsi MU2B36

Difficulty date
July 14, 2007
Submitted
August 3, 2007
Operation
General aviation
Make and model
Mtsbsi MU2B36
Aircraft time
19,568 hours
Engine
Garrtt TPE33110
Propeller
Hartzl HCB3TN5
Part
Lever
Part number
022A431113
Condition
Loose
Location
Prop Pitch
Part time
4,539 hours
Stage of operation
DE
How discovered
O
Nature of condition
F
Precautionary procedure
E

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

What was found

(CAN) THE PPC LEVER WAS FOUND SEPARATED FROM THE PPC INPUT SHAFT. THE BOLT WAS OF THE CORRECT P/N, YET WAS THREAD BOUND WITHOUT PRODUCING ENOUGH TENSION TO HOLD THE PPC ARM ONTO THE PPC SHAFT. THE PPC ARM WAS REINSTALLED AND A WASHER WAS PLACED UNDER THE HEAD OF THE BOLT TO PROVIDE A BETTER GRIP ON THE SPLINED SHAFT. THE PPC INPUT SHAFT HAS A THREADED BORE WHICH WOULD ALLOW THE USE OF AN ADDITIONAL BOLT AND WASHER AS A BACKUP RETAINER FOR THE PPC ARM IN THE EVENT THAT THE ARM WERE TO LOOSEN OFF. THE AIRFRAME IPC DOES NOT SHOW A BOLT FOR THIS PURPOSE. (TC NR 20070718004)