SDR UALA2010092703575

Service difficulty report · Isolation Valve · Boeing 767322

Difficulty date: September 27, 2010
Submitted: October 18, 2010
Operation: Air carrier
Aircraft: N663UA
Make and model: Boeing 767322
Aircraft serial: 27160
Aircraft time: 75,218 hours, 12,247 cycles
Engine: Pwa PW4060
System (JASC): 3610 · Pneumatic Distribution System
Part: Isolation Valve
Part number: 7732887810
Part serial: 149
Condition: Failed
Location: Rt Engine
Stage of operation: TX
How discovered: O
Nature of condition: J
Precautionary procedure: D

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

What was found

RIGHT ENGINE BLEED OFF LIGHT ON & RT ENG BLEED OFF EICAS MESSAGE, WITH ENG RUNNING, ENG BLEED SWITCH ON, LT & RT ISOLATION VALVES CLOSED, AC PACK SELECTED ON, & DUCT PSI IS ZERO. OFF LIGHT STAYS ON WHEN N1 IS ABOVE 41%. REPLACED PRSOV PER MM. ACP ENG RUN PER JRH ALL OPERATION AND INDICATIONS NORMAL.