Service difficulty report · Valve · Bolkms BK117C2

Difficulty date
July 14, 2010
Submitted
July 23, 2010
Operation
Air carrier
Aircraft
N102VU
Make and model
Bolkms BK117C2
Aircraft serial
9044
Aircraft time
4,304 hours
Engine
Tmeca ARRIEL1
Engine time
3,550 hours, 9,783 cycles
Part
Valve
Part number
9550178290017407
Part serial
73241288
Condition
Failed
Location
Nr1 Engine
Part time
578 hours
Stage of operation
NR
How discovered
O
Nature of condition
A
Precautionary procedure
E

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

What was found

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