Service difficulty report · Seal · Bolkms BK117C1

Difficulty date
June 10, 2009
Submitted
June 11, 2009
Operation
Air carrier
Aircraft
N317MC
Make and model
Bolkms BK117C1
Aircraft serial
7505
Aircraft time
12,238 hours, 28,946 cycles
Engine
Tmeca ARRIEL1E2
Engine time
9,856 hours
Part
Seal
Condition
Failed
Location
Nr 2 Engine
Part time
9,856 hours
Stage of operation
NR
How discovered
O
Nature of condition
K, J
Precautionary procedure
A

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

What was found

DURING CRUISE FLIGHT, THE NR 2 ENGINE OIL PRESSURE CAUTION LIGHT ILLUMINATED ALONG WITH A DROP ON THE OIL PRESSURE INDICATOR GAUGE. THE ENGINE WAS SHUTDOWN IN FLIGHT AND A UNSCHEDULED RUNNING LANDING WAS PERFORMED WITHOUT INCIDENT. THE NR 2 ENGINE MODULE 5 INTERNAL SEAL HAD FAILED, ALLOWING THE ENGINE OIL TO EXIT THE ENGINE THROUGH THE NR 3 BEARING OIL BREATHER LINE. ENGINE BEING REPLACED.