Service difficulty report · Chip Detector · Bolkms BK117A3

Difficulty date
January 29, 2011
Submitted
February 1, 2011
Operation
Air carrier
Aircraft
N420MB
Make and model
Bolkms BK117A3
Aircraft serial
7077
Aircraft time
12,707 hours, 44,752 cycles
Engine
Lyc LTS101650B1
Engine time
7,499 hours, 20,763 cycles
Part
Chip Detector
Condition
Contaminated
Location
Nr 2 Engine
Stage of operation
AA
How discovered
O
Nature of condition
J
Precautionary procedure
E, A

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

What was found

NR 2 ENGINE CHIP LIGHT ILLUMINATED ALONG WITH THE MASTER CAUTION LIGHT. PILOT NOTED THAT THERE WERE NO N2 FLUCTUATIONS. AIR RETURNED AND ATTEMPTED A CHIP BURN WITH NEGATIVE RESULTS. PERFORMED SHUTDOWN OF THE NR 2 ENGINE. LANDED WITHOUT INCIDENT. MECHANIC CALLED OUT TO ACFT & FOUND ONE SMALL PIECE OF DEBRIS IN THE CHIP DETECTOR. IAW MM, THIS CHIP WAS CATEGORIZED AS A MINOR CHIP-TYPE 2. ONCE THE CHIP WAS REMOVED, THE ACFT WAS GROUND RUN FOR TEN MINUTES WITH NO DEFECTS. THE ACFT WAS THEN RETURNED TO SERVICE.