Service difficulty report · Actuator · Boeing 757222

Difficulty date
September 2, 2011
Submitted
September 14, 2011
Operation
Air carrier
Aircraft
N596UA
Make and model
Boeing 757222
Aircraft serial
28749
Aircraft time
53,063 hours, 14,841 cycles
Engine
Pwa PW2037
Part
Actuator
Part number
S343T00366
Part serial
T00191
Condition
Faulty
Location
Fuel System
Stage of operation
CR
How discovered
O
Nature of condition
J
Precautionary procedure
A

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

What was found

NR 2 FUEL SPAR VALVE ISSUE, RTFL. RIGHT FUEL SPAR VALVE LIGHT ON WITH EICAS 30 MINUTES INTO FLIGHT AND REMAINS ON. RT ENG PARAMETERS ALL NORMAL, FUEL FLOW MATCHES LEFT ENGINE. MAINT TEXT: SEE PTT SEQ #0632003 FOR WIRING CHECK INFO. NO WIRING DEFECTS FOUND BETWEEN CUTOFF-RUN SWITCH AND R SPAR FUEL SHUTOFF VALVE V26. REPLACED NUMBER TWO ENGINE FUEL SHUTOFF VALVE, SPAR VALVE, ACTUATOR AFTER COMPLETING WIRING CHECK OK PER MM. FOUND RIGHT ENGINE SPAR VALVE CB TRIPPED ON P6 PANEL. ACCOMPLISHED WIRING CHECK FROM R SPAR FUEL SHUTOFF VALVE (V26) CONNECTOR D2022, PINS 2, 5, AND 6, TO R FUEL CUTOFF-RUN SWITCH S3. CHECKED OK-NO SHORTS TO GROUND, SHORTS TO SHIELD, OR PIN-TO-PIN SHORTS. SHOOK WIRING AT CONNECTOR-NO DISCREPANCIES.