SDR UALA2013062104336

Service difficulty report · Regulator · Boeing 757222

Difficulty date: June 21, 2013
Submitted: July 26, 2013
Operation: Air carrier
Aircraft: N544UA
Make and model: Boeing 757222
Aircraft serial: 25322
Aircraft time: 81,160 hours, 23,314 cycles
Engine: Pwa PW2037
System (JASC): 3610 · Pneumatic Distribution System
Part: Regulator
Part number: S212N1023
Part serial: 125
Condition: Malfunctioned
Location: Nr 2 Engine
Stage of operation: CR
How discovered: O
Nature of condition: J
Precautionary procedure: O

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

What was found

DURING CRUISE, LEFT DUCT PRESSURE AT 29PSI, RIGHT DUCT 7PSI. PACK TEMPS STABLE. REPLACED HIGH STAGE VALVE, HIGH STAGE CONTROLLER, AND CHECKED LINES. LESS THAN 5 PSI OUTPUT. NO INCREASE WITH THROTTLES. REPLACED DUAL PRESSURE INDICATOR. REPLACED PRSOV REGULATOR PER AMM. ALSO REPLACED MISSING PACKING ON PRSOV VALVE, FITTING NEAR LOCK OUT FITTING. RAN ENGINE AT IDLE AND INDICATIONS NORMAL.