Service difficulty report · Impeller · Doug MD900

Difficulty date
May 9, 2011
Submitted
May 13, 2011
Operation
Air carrier
Aircraft
N902LC
Make and model
Doug MD900
Aircraft serial
90000118
Aircraft time
1,765 hours, 7,052 cycles
Engine
Pwc PW207E
Engine time
1,762 hours, 3,896 cycles
Part
Impeller
Part number
3058672013044095
Part serial
A0012BEL
Condition
Damaged
Location
Nr 2 Compress
Part time
1,761 hours, 3,896 cycles
Stage of operation
AP
How discovered
O
Nature of condition
R, J
Precautionary procedure
O

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

What was found

PART OF THE GASKET OF THE INLET SCREEN CAME LOOSE AND WAS INGESTED INTO THE ENGINE. ONE BLADE ON THE COMPRESSOR HAD DAMAGE THAT CAUSED A LOUD WHINING NOISE WHEN THE ENGINE WAS OPERATED. THE ONLY DAMAGE THAT CAN BE OBSERVED IS THE COMPRESSOR BLADES. IT IS BELIEVED THAT THE POSSIBLY OF OVER TORQUING THE INLET SCREEN MAY HAVE CONTRIBUTED TO THE GASKET FAILURE ALONG WITH NOT ENOUGH ADHESIVE ON THE GASKET TO ENSURE IT WOULD NOT RELEASE.

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