Service difficulty report · Probe · Bolkms BK117C2

Difficulty date
October 1, 2025
Submitted
October 6, 2025
Operation
General aviation
Aircraft
N140SF
Make and model
Bolkms BK117C2
Aircraft serial
9389
Aircraft time
9,044 hours, 25,445 cycles
Engine
Tmeca ARRIEL1
Part
Probe
Part number
9550179250
Part serial
7119
Condition
Faulty
Location
Eng Bay
Stage of operation
IN
How discovered
V
Nature of condition
M
Precautionary procedure
E

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

What was found

DURING START UP THE PILOT NOTED A HIGH RISE IN TEMP WHICH EXCEEDED ALLOWABLE TEMP FOR START. IMMEDIATELY SHUT THE ENGINE DOWN. CONTACTED MX. PER THE MX MANUAL NO TEMPS WERE EXCEEDED PER THE MX MANUAL ONLY THE "ALLOWABLE" LIMIT FOR PILOT START. FURTHER TROUBLESHOOTING FOUND A FAULTY TEMP PROBE WHICH WOULD HAVE CAUSED A HIGHER THAN NORMAL TEMP DURING THE START. CHANGED THE TEMP PROBE AND ENGINE STARTED NORMAL.