Service difficulty report · Thermocouple · Bolkms BK117C2

Difficulty date
October 29, 2025
Submitted
October 29, 2025
Operation
General aviation
Filed by
QR9R369D
M1 Support Services
Make and model
Bolkms BK117C2
Aircraft serial
9123
Aircraft time
4,638 hours
Part
Thermocouple
Part number
0177887050
Part serial
527MA
Condition
Failed
Location
Nr 2 Engine
Stage of operation
HO
How discovered
V
Nature of condition
F
Precautionary procedure
C

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

What was found

FLI DEGR NR 2 TOT NOT DISPLAYING DURING HOVER TAXI. DURING AIRCRAFT RECOVERY ON APPROACH, FLI DEGRADE APPEARED WITH TOT TURNING YELLOW AND DROPPING FROM 650 C TO 125 C THEN COMPLETELY DISAPPEARING. RECYCLE OF THE BATTERY WOULD MAKE TOT REAPPEAR BUT THE MAX TOT DISPLAYED WAS 125 C. REMOVED AND REPLACED ENG NR 2 THERMOCOUPLE BOX IAW SAFRAN ENGINE MANUAL TASK 77-22-00-900-802-A01.