Service difficulty report · Thermocouple · Bolkms BK117C2

Difficulty date
March 17, 2025
Submitted
March 17, 2025
Operation
General aviation
Filed by
QR9R369D
M1 Support Services
Make and model
Bolkms BK117C2
Aircraft serial
9109
Aircraft time
5,225 hours
Part
Thermocouple
Part number
9550179250
Condition
Out Of Tolerance
Location
Nr 2 Eng
Stage of operation
HO
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.

What was found

DURING HOVERING FLIGHT, ENG PA DIS (TOT) ENG #1 READING 540 C, ENG #2 READING 220 C. DURING TROUBLESHOOTING FOR #2 ENGINE TOT INDICATION LOW, FOUND #2 ENG BOTTOM OUTBOARD THERMOCOUPLE BAD. READS OUT TOLERANCE ON RESISTANCE CHECKS IAW ENGINE MANUAL 77-22-00-210-802-A01. REMOVED AND REPLACED THERMOCOUPLE IAW SAFRAN MANUAL TASK 77-22-00-900-801-A01. MTF MOC COMPLETED IAW RFM.