What was found
FAULTY TRIPLE TACHOMETER NR INDICATION WITH TWIST GRIPS IN FLIGHT (INTERMITTENT 101 TO 0 INDICATIONS WITH W/U DISPLAY AND AUDIO). REMOVED AND REPLACED NR SENSOR IAW AMM 62-41-00, 41. MOC OK.
- Difficulty date
- May 16, 2025
- Submitted
- May 16, 2025
- Operation
- General aviation
- Filed by
- QR9R369D
M1 Support Services - Make and model
- Bolkms BK117C2
- Aircraft serial
- 9176
- Aircraft time
- 3,956 hours
- System (JASC)
- 6240 · Main Rotor Indicating System
- Part
- Sensor
- Part number
- 430106202
- Condition
- Faulty
- Location
- Rotor Speed
- 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.