SDR UALA2012022201069

Service difficulty report · Bleed Valve · Boeing 777222

Difficulty date: February 21, 2012
Submitted: February 24, 2012
Operation: Air carrier
Aircraft: N214UA
Make and model: Boeing 777222
Aircraft serial: 30220
Aircraft time: 41,334 hours, 8,922 cycles
Engine: Pwa PW4077
System (JASC): 7532 · Compressor Bleed Valve
Part: Bleed Valve
Part number: 5400001UA6NB
Condition: Faulty
Location: Nr 2 Engine
Stage of operation: IN
How discovered: V
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

NR 2 ENGINE 2.9 STAB, BLEED VALVE, 2514-2 ENGINE 777035 ECM DATA SHOWS 2.9 STABILITY BLEED VALVE, SETTING MESSAGE 75-60482 '2.9 STABILITY BLEED VALVE (R ENG) IS NOT, IN COMMANDED POSITION'. ECM SHOWS HIGH TEMP AT 2.9 THERMOCOUPLE, BUT EGT CONFIRMS VALVE NOT FAILED OPEN. SUSPECT VALVE HAS SMALL, HOT AIR LEAK. REPLACED RT ENG 2.9 STAB BLEED VALVE PER MM. GROUND ENG LEAK CHECKED OKAY.