Service difficulty report · Blades · Bell 407

Difficulty date
April 25, 2012
Submitted
September 14, 2015
Operation
General aviation
Make and model
Bell 407
Engine
Allsn 250C47B
Part
Blades
Condition
Broken
Location
Compressor
Part time
3,604 hours
Stage of operation
NR
How discovered
9
Nature of condition
O
Precautionary procedure
O

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

What was found

(CAN) DURING RECEIVING INSPECTION, IT WAS REPORTED THAT 1 OF THE COMPRESSOR BLADES WAS FOUND BROKEN. DUE TO THE EXTENT OF DAMAGE FOUND ON COMPRESSOR IMPELLER, COMPRESSOR ASSY WAS DISASSEMBLED COMPLETELY. MOREOVER, THE GP SECTION WAS SEPARATED FROM THE REST OF TURBINE ASSY. THERE WAS NO SIGN OF EVIDENCE THAT THE FRACTURED BLADE WAS INGESTED THROUGH THE TURBINE FLOW PATH.

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