SDR CALA2013101892171

Service difficulty report · Outflow 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: 52,569 hours, 6,313 cycles
Engine: Pwa PW40903
System (JASC): 2133 · Pressure Regulator/Outflow Valve
Part: Outflow Valve
Condition: Malfunctioned
Location: Cabin Pressure
Stage of operation: IN
How discovered: O
Nature of condition: J
Precautionary procedure: K

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

What was found

CABIN ALTITUDE AUTO LOSS OF INPUT FROM, OR FAILURE OF BOTH ASCPC'S, OR LOSS OF INPUT OR FAILURE OF BOTH OFV'S, OR A COMBINATION OF THE ABOVE THAT RESULTS IN LOSS OF COMPLETE AUTOMATIC CONTROL, OR MANUAL MODE SELECTED FOR BOTH OFV'S. CAUTION IAW PTT SEQ 5692013 OUTFLOW VLV FWD LT IAW AMM 21-31-03, OPERATIONS CHECKED GOOD, NO FAULTS NOTED.