SDR AALA202002039006

Service difficulty report · Outflow Valve · Boeing 7572B7

Difficulty date: January 31, 2020
Submitted: February 3, 2020
Operation: Air carrier
Aircraft: N938UW
Make and model: Boeing 7572B7
Aircraft serial: 27246
Aircraft time: 80,074 hours, 28,278 cycles
System (JASC): 2133 · Pressure Regulator/Outflow Valve
Part: Outflow Valve
Part number: 60683218
Part serial: 13411
Condition: Faulty
Location: Zone 200 - Fuse
Part time: 75,192 hours, 26,526 cycles
Stage of operation: CR
How discovered: 9
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

AIRCRAFT WAS GROUNDED: CABIN PRESS LOST AT 37,000 FT EMERGENCY DECLARED. DIVERT TO HNL. CABIN CLIMBED TO 10,000 DIFF PRES 7 MAX DOWN RATE. OUTFLOW VALVE, CABIN PRESSURE SELECTOR PANEL AND AUTO 1 CABIN PRESSURE CONTROLLER REPLACED. ACCOMPLISHED WORK CARD 19L21021001.

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