Service difficulty report · Oil Cooler · Bell 407

Difficulty date
August 8, 2024
Submitted
August 12, 2024
Operation
Air carrier
Aircraft
N370AM
Make and model
Bell 407
Aircraft serial
54584
Aircraft time
2,853 hours, 11,894 cycles
Engine
Allsn 250C47B
Engine time
3,165 hours, 10,408 cycles
Part
Oil Cooler
Part number
406360500105
Part serial
1061
Condition
Failed
Location
Engine
Stage of operation
CL
How discovered
O
Nature of condition
M, J
Precautionary procedure
A

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

What was found

DURING TAKEOFF AND INITIAL CLIMB FROM KFMM, THE ENGINE OIL TEMPERATURE EXCEEDED ITS MAXIMUM LIMIT OF 107°C, REACHING A PEAK OF 116°C. THE EXCEEDANCE WAS IDENTIFIED SHORTLY AFTER TAKEOFF, PRIOR TO TRANSITIONING TO CRUISE FLIGHT. UPON OBSERVING THE ABNORMAL TEMPERATURE, I NOTIFIED THE CREW AND STARTED A PROMPT RETURN TO KFMM. THE AIRCRAFT WAS SAFELY LANDED AT THE AIRPORT AND ALL APPROPRIATE PARTIES WERE CONTACTED.

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