Service difficulty report · Thermocouple · Bolkms BK117C2

Difficulty date
December 10, 2025
Submitted
December 10, 2025
Operation
General aviation
Filed by
QR9R369D
M1 Support Services
Make and model
Bolkms BK117C2
Aircraft serial
9360
Aircraft time
3,720 hours
Part
Thermocouple
Part number
0177887050
Condition
Failed
Location
Nr 1 Engine
Stage of operation
TX
How discovered
O
Nature of condition
J
Precautionary procedure
C

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

What was found

ENGINE PARAMETER DISCONNECT ON TOT DURING START RUN-UP. A TESTFLIGHT EVAL REVEALED DURING ENG RUN-UP #1 FLI DEGRAD CAUTION FLICKERED FROM IDLE TO FLIGHT WITH BOTH TOTS AMBER. INFLIGHT ENG PA DIS CAUTION APPEARED AND #1 FLI DEGRAD FLICKERED. REMOVED AND REPLACED #1 ENG THERMOCOUPLE BOX IAW 77-22-00-900-802-A01.