SDR AWXA9900327

Service difficulty report · Outflow Valve · Boeing 7373Y0

Difficulty date: September 24, 1999
Submitted: March 26, 2000
Operation: Air carrier
Aircraft: N331AW
Make and model: Boeing 7373Y0
Aircraft serial: 23747
System (JASC): 2133 · Pressure Regulator/Outflow Valve
Part: Outflow Valve
Condition: Malfunctioned
Location: Cabin
Stage of operation: CL
Nature of condition: O
Precautionary procedure: A

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

What was found

CABIN ALTITUDE CLIMBED TO 10,500 WHILE A/C CLIMBED THRU 32,500. WENT TO MANUAL AND CLOSED OUTFLOW VALVE, GOT CONTROL OF CABIN AT LOWER ALTITUDE. PERFORMED AUTO PRESSURIZATION TEST, OPS CHECK GOOD MM 21-31-00. PERFORMED CABIN LEAK-DOWN CHECK, LK AND OPS CK GOOD MM 05-51-91.

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