What was found
TRIPLE TACH FAILURE IN FLIGHT. ROTOR NEEDLE SWUNG FULL DEFLECTION AND BACK TO ZERO MULTIPLE TIMES. NO CHANGE IN ROTOR STABILIZATION. NO ASSOCIATED WARNINGS OR AUDIBLE TONES.
- Difficulty date
- September 25, 2023
- Submitted
- September 25, 2023
- Operation
- Air carrier
- Aircraft
- N138LN
- Make and model
- Urocop EC135P2
- Aircraft serial
- 0352
- Aircraft time
- 7,450 hours, 24,100 cycles
- System (JASC)
- 3100 · Indicating/Recording System
- Part
- Tachometer
- Part number
- L771M40C1030
- Part serial
- 1005
- Condition
- Faulted
- Location
- Instrument Panel
- Stage of operation
- AA
- How discovered
- V
- Nature of condition
- O, F
- Precautionary procedure
- A
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.