SDR HEEA129747

Service difficulty report · Bearing · Bell 407

Difficulty date
October 5, 2010
Submitted
November 8, 2010
Operation
Air carrier
Aircraft
N433P
Make and model
Bell 407
Aircraft serial
53861
Aircraft time
471 hours
Engine
Allsn 250C47B
Engine time
471 hours
Part
Bearing
Part number
6871505
Part serial
MP087785
Condition
Spalled
Location
Engine
Part time
471 hours
Component
Turbine
Component part number
23063354
Stage of operation
IN
How discovered
V
Nature of condition
O
Precautionary procedure
K

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

What was found

ENGINE REMOVED DUE TO METAL IN OIL. NR5 BEARING EXHIBITED SPALLING OF OUTER RACE, N1 COUPLING PN 23032345 IS OUT OF BALANCE, WASHER PN 6848996-3 IS WORN, CUP WASHER PN 6889319 HAD METAL FALLOUT AT SAFETY LOCATION. SCRAPPED PARTS AND REPLACED WITH NEW.

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