Service difficulty report · Lvdt · Boeing 757222

Difficulty date
November 3, 1997
Submitted
March 26, 2000
Operation
Air carrier
Aircraft
N562UA
Make and model
Boeing 757222
Aircraft serial
26664
Engine
Pwa PW2037
Part
Lvdt
Part number
3811035
Condition
Failed
Location
Rt Engine
Stage of operation
CL
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

ON CLIMBOUT LOUD NOISE HEARD AND EGT WENT TO 705. RIGHT ENGINE WAS SHUTDOWN. *S/D* ENGINE EXPERIENCED A COMPRESSOR STALL DUE TO AN INOP STATOR VANE ACTUATOR (SVA) FEEDBACK CHANNEL. THIS SITUATION CAUSED THE SVA TO GO TO FAIL-SAFE POSITION (FULL OPEN). WHEN THE THROTTLE WAS REDUCED FROM TAKEOFF POWER, A STALL OCCURRED SINCE THE STATOR VANES COULD NOT CLOSE. THE INOPERATIVE CHANNEL WAS CAUSED BY A DEFECTIVE LINEAR VARIABLE DUAL TRANSDUCER (LVDT), WHICH HAD A BREAK IN ITS COIL WINDINGS. LVDTS WITH GREATER THAN 7000 HRS TIS AT SHOP VISIT WILL BE REPLACED.