Service difficulty report · Blades · Bell 407

Difficulty date
December 31, 2015
Submitted
April 22, 2016
Operation
General aviation
Make and model
Bell 407
Aircraft time
4,807 hours
Engine
Allsn 250C47B
Part
Blades
Condition
Damaged
Location
Turbine Section
Stage of operation
CR
How discovered
O
Nature of condition
O
Precautionary procedure
A

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

What was found

(CAN) BOTH OCCUPANTS OF ACFT NOTICED AN UNUSUAL NOISE COMING FROM THE ENGINE. A PRECAUTIONARY LANDING WAS MADE AND ENGINE SHUTDOWN. UPON INSPECTION IT WAS NOTICED THAT THE BLADES ON BOTH TURBINE DISKS HAD STARTED TO RUB AGAINST THE OUTER CASING. ENGINE REMOVED FOR EXAMINATION.

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