SDR HALA2010101800473

Service difficulty report · Outflow Valve · Boeing 76733A

Difficulty date: October 18, 2010
Submitted: October 19, 2010
Operation: Air carrier
Aircraft: N581HA
Make and model: Boeing 76733A
Aircraft serial: 28141
Aircraft time: 33,497 hours, 6,348 cycles
Engine: Pwa PW4060
System (JASC): 2133 · Pressure Regulator/Outflow Valve
Part: Outflow Valve
Condition: Malfunctioned
Location: Cabin Pressure
Stage of operation: CR
How discovered: O
Nature of condition: J
Precautionary procedure: A

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

What was found

AIR TURN BACK - DUE TO CABIN AUTO INOP, UPON ARRIVAL MODE SELECTOR ON MAN. POSITION. PERFORMED FIM 21-31-00 MANUAL MODE CTRL TEST-CABIN IAW AMM TASK 21-31-00-705-071, MESSAGE CLEARED, OK FOR FLIGHT. CHECKED OUTFLOW VALVE FOR OBSTRUCTION FOUND NORMAL, IAW AMM TASK21-31-00-705-071 MANUAL MODE CONTROL TEST PASSED.

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