Service difficulty report · Actuator · Bolkms BK117C2

Difficulty date
March 31, 2023
Submitted
March 31, 2023
Operation
General aviation
Filed by
QR9R369D
M1 Support Services
Make and model
Bolkms BK117C2
Aircraft serial
19724399825
Aircraft time
2,203 hours
Part
Actuator
Part number
B761M2400102
Part serial
00046
Condition
Malfunctioned
Stage of operation
CR
How discovered
V
Nature of condition
F
Precautionary procedure
A

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

What was found

FLIGHT 1 VARTOMS MALFUNCTIONED IN FLIGHT. DURING TWIST GRIP FOR SIMULATED ENGINE FAILURE ON ENGINE # 2 THE ROTOR WOULD NOT BEEP UP ON EITHER COLLECTIVE. PLACED IT IN MAN MODE AND WENT FULL SPLIT. WHEN ENGINE WAS BACK AT FULL THROTTLE IN MAN THE NUMBER 2 ENGINE WAS EXTREMELY SLOW TO BEEP BACK UP TO MATCH NUMBER 1 ENGINE. TEST FLIGHT EVAL DETERMINED #1 TRIM MOTOR INOP. TRIM MOTOR DOES NOT MOVE FORWARD OR AFT USING BEEP TRIM ON BOTH PILOT AND CO-PILOT COLLECTIVE CONTROL HEADS. VERIFIED VISUALLY AND ON BREAKOUT BOX. REMOVED AND REPLACED #1 TRIM ACTUATOR IAW AMM 76-12-00, 4-8. MOC COMPLETED, NO FAULTS NOTED.