Service difficulty report · Actuator · Bolkms BK117C2

Difficulty date
November 8, 2019
Submitted
November 18, 2019
Operation
Air carrier
Aircraft
N145UC
Make and model
Bolkms BK117C2
Aircraft serial
9494
Aircraft time
3,414 hours, 15,564 cycles
Engine
Tmeca ARRIEL1E2
Engine time
3,414 hours, 13,627 cycles
Part
Actuator
Part number
B673M40A1002
Part serial
00194
Condition
Faulty
Location
Tailrotor
Part time
3,414 hours, 15,564 cycles
Stage of operation
CR
How discovered
V
Nature of condition
J
Precautionary procedure
K

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

What was found

PILOT REPORTED AN ACTUATOR WARNING LIGHT ILLUMINATED ON THE CENTRAL PANEL DISPLAY SYSTEM WITH NO SECONDARY INDICATIONS OR SUBSEQUENT DEGRADATION OF CONTROL-ABILITY. SYSTEM WAS DEFERRED I/A/W WITH THE APPROVED MEL AND RETURNED TO SERVICE. DURING THE REPAIR PHASE OF THE BEFORE MENTIONED DEFERRED MAINTENANCE THE REPAIRING TECHNICIANS NOTED A SHEARED BOLT SECURING THE T/R ACTUATOR "CARDAN JOINT" TO THE ACTUATOR ASSY. CORRECTIVE ACTION WAS TAKEN AND THE DEFECTIVE COMPONENT WAS REMOVED FROM SERVICE. T/R ACTUATOR MANUFACTURE: LIEBERR - COMPONENT TT: 3415.5 - NOTE: T/R ACTUATOR MANF IS NOTE LISTED IN THE DROP MENU BUT PROVIDED HERE IN THE PROBLEM DESCRIPTION.