Service difficulty report · Gearbox · Bell 407

Difficulty date
July 1, 2002
Submitted
July 22, 2002
Operation
General aviation
Make and model
Bell 407
Engine
Allsn 250C47B
Part
Gearbox
Part number
23064640
Part serial
HL16325
Condition
Mismanufactured
Location
Engine
Stage of operation
IN
How discovered
V
Nature of condition
W
Precautionary procedure
K

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

What was found

UPON INSPECTION BEFORE GEARBOX ASSEMBLY. SCAVENGE TUBE CUT OUT NOT WIDE ENOUGH, CAUSING TUBE TO RUB. 2 EACH STUDS NOT FULLY SEATED AT N1 PICKUP AREA. OIL PUMP INSERTS NOT CLEANED OUT. ASSURE PROPER MANUFACTURING AND INSPECTED BY QA BEFORE LEAVING FACTORY.

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