What was found
AFTER STARTING ENGINE #2, INITIALLY NR APPEARED ON THE TRIPLE TACH AND MATCHED #2 N2, BUT THEN RETURNED TO 0. A BATTERY DISCONNECT/RESET DID NOT RESOLVE THE PROBLEM. REMOVED AND REPLACED SPEED PICK-UP SENSOR.
- Difficulty date
- April 20, 2026
- Submitted
- April 20, 2026
- Operation
- General aviation
- Filed by
- QR9R369D
M1 Support Services - Make and model
- Bolkms BK117C2
- Aircraft serial
- 9758
- Aircraft time
- 4,845 hours
- System (JASC)
- 6240 · Main Rotor Indicating System
- Part
- Sensor
- Part number
- 430106202
- Part serial
- 2116917337663
- Condition
- Faulty
- Location
- Rotor Tach
- Stage of operation
- TX
- How discovered
- V
- Nature of condition
- F
- Precautionary procedure
- C
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.