Service difficulty report · Sliding Sleeve · Bolkms BK117B2

Difficulty date
November 8, 2010
Submitted
November 12, 2010
Operation
Air carrier
Aircraft
N211SL
Make and model
Bolkms BK117B2
Aircraft serial
7201
Aircraft time
15,577 hours, 59,518 cycles
Engine
Lyc LTS101*
Part
Sliding Sleeve
Part number
10541961
Part serial
058138
Condition
Debonded
Location
Swashplate
Part time
3,772 hours
Component
Swashplate · A3
Component part number
11741905
Stage of operation
TX
How discovered
9
Nature of condition
O
Precautionary procedure
O

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

What was found

UPON AIRWORTHINESS INSPECTION IN THE MORNING, THE MECHANIC FOUND THAT THE MAIN ROTOR SWASHPLATE SLIDING SLEEVE TEFLON BUSHING HAD TEFLON LINER DEBONDED FROM BUSHING AND WAS WORKING ITS WAY OUT OF THE LOWER PORTION OF THE SLIDING SLEEVE ASSEMBLY AND THUS AFFECTING THE SLIDING SLEEVE FLIGHT CONTROL.