SDR 2016F00236

Service difficulty report · Torquemeter · Bell 407

Difficulty date: November 12, 2016
Submitted: December 7, 2016
Operation: Air carrier
Aircraft: N30HF
Make and model: Bell 407
Aircraft serial: 53776
Aircraft time: 3,763 hours
System (JASC): 7712 · Engine BMEP/Torque Indicating
Part: Torquemeter
Condition: Blocked
Location: Gearbox
Stage of operation: AA
How discovered: O
Nature of condition: C
Precautionary procedure: C

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

What was found

PILOT EXPERIENCED HIGH TORQUE INDICATION ON INSTRUMENT. TROUBLESHOOTING WAS PERFORMED AND FOUND TO BE INTERNAL TO THE ENGINE GEARBOX TORQUEMETER. UPON REMOVAL OF ENGINE, DELIVERY TO OVERHAUL FACILITY, AND DISASSEMBLY OF GEARBOX AND TORQUEMETER, PLASTIC MEDIA WAS DISCOVERED INTERNAL TO TORQUEMETER.

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