SDR CA110811008

Service difficulty report · Gearbox · Bolkms BK117B2

Difficulty date: August 10, 2011
Submitted: September 9, 2011
Operation: Air carrier
Make and model: Bolkms BK117B2
Aircraft time: 8,127 hours
Engine: Lyc LTS101750B1
System (JASC): 7210 · Turbine Engine Reduction Gear
Part: Gearbox
Condition: Making Metal
Location: Accy
Stage of operation: NR
How discovered: V
Nature of condition: J
Precautionary procedure: E

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

What was found

SCAVENGE LINE CHIP DETECTOR AND OIL FILTER FOUND TO HAVE MINOR CLASSIFICATION OF METAL CONTAMINTATION. OIL SYS FLUSH AND FILTER CHANGE CARRIED OUT. POST TEST FLIGHT INSP REVEALED SATISFATORY RESULTS. AFTER 3.5 HOURS OF ENGINE OPERATION THE SYS WAS RE-INSPECTED WITH MINOR NON BRIDGING PARTICLES FOUND ON CHIP DETECTOR AND 2 SILVER FLAKES IN SCAVENGE OIL FILTER. ENGINE REMOVED AND REPLACED.