SDR AU990738

Service difficulty report · Piston Ring · Boeing 737377

Difficulty date
June 21, 1999
Submitted
March 26, 2000
Operation
General aviation
Make and model
Boeing 737377
Part
Piston Ring
Part number
31739394
Condition
Cracked
Location
Air Distribution
Stage of operation
IN
Nature of condition
O
Precautionary procedure
K

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

What was found

(AUS) RIGHT PRESSURE REGULATING AND SHUTOFF VALVE FAULTY. WORKSHOP INSPECTION FOUND THAT THE CONTROL PISTON RING SET WAS CRACKED AND THE ACTUATOR COVER PACKING WAS TORN.