What was found
IN STRAIGHT AND LEVEL FLIGHT, AIRCRAFT OSCILLATES IN YAW AXES. WHEN SAS CUT IS ACTIVATED, OSCILLATIONS STOP. REMOVED AND REPLACED SEMA ACTUATOR IAW 67-20-00, 4-14, 4-8. TEST FLIGHT SUCCESSFULLY COMPLETED IAW AMM 05-60-00, 6-1.
- Difficulty date
- February 7, 2023
- Submitted
- February 7, 2023
- Operation
- General aviation
- Filed by
- QR9R369D
M1 Support Services - Make and model
- Bolkms BK117C2
- Aircraft serial
- 10721699417
- Aircraft time
- 4,007 hours
- System (JASC)
- 6720 · Tail Rotor Control System
- Part
- Actuator
- Part number
- 41800876400
- Part serial
- 701995
- Condition
- Oscillates
- Location
- Not Reported
- Stage of operation
- CR
- How discovered
- O
- Nature of condition
- F
- Precautionary procedure
- A
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.