SDR 2026F00115

Service difficulty report · Engine · Bell 407

Difficulty date
May 20, 2026
Submitted
May 22, 2026
Operation
General aviation
Aircraft
N777ZA
Make and model
Bell 407
Aircraft serial
54626
Aircraft time
5,614 hours, 5,259 cycles
Engine
Allsn 250C47B
Engine time
4,339 hours, 4,050 cycles
Part
Engine
Condition
Smoke
Part time
4,339 hours, 4,050 cycles
Stage of operation
NR
How discovered
O
Nature of condition
B
Precautionary procedure
E

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

What was found

THIS IS TO REPORT A NEW EVENT FOLLOWING SDR NO. 2120-0663. THE REPAIRED ENGINE WAS TAKEN OUT OF SERVICE FOR THE ENGINE SMOKE WHEN ENGINE TRANSITIONS FROM FLY TO IDLE. TROUBLESHOOTING WAS CARRIED OUT PER THE ROLLS ROYCE MANUAL. NO DISCREPANCIES WERE NOTED. THE REPAIR WAS PERFORMED BY PHI AS PREVIOUSLY NOTED. PHI WAS NOTIFIED ABOUT THE EVENT. THIS EVEN OCCURRED APPROXIMATELY 65 HOURS AFTER REPAIR OF A SIMILAR ISSUE DESCRIBED IN THE SDR NOTED EARLIER IN THIS DESCRIPTION.

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