SDR CALA2013101792145

Service difficulty report · Shutoff Valve · Boeing 777222

Difficulty date: October 16, 2013
Submitted: October 22, 2013
Operation: Air carrier
Aircraft: N222UA
Make and model: Boeing 777222
Aircraft serial: 30553
Aircraft time: 52,563 hours, 6,311 cycles
Engine: Pwa PW40903
System (JASC): 3610 · Pneumatic Distribution System
Part: Shutoff Valve
Condition: Malfunctioned
Location: Bleed Air Sys
Stage of operation: NR
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

BLEED PRSOV LEFT MESSAGE DUE TO CHRONIC BLEED PRSOV LEFT MESSAGES, PLEASE PERFORM A PNEUMATIC SYSTEM HEALTH CHECK IAW SERVICE TIP 36-UA1 FOR PRSOV MUSCLE LINE FROM PRSOV TO PRSOV CONT. R & R PRSOV IAW AMM 36-11-09. ALSO, REPLACED PRSOV CONTROLLER IAW 36-11-18-401 PRECAUTIONARY.