SDR DL757040774

Service difficulty report · Outflow Valve · Boeing 757232

Difficulty date: August 17, 2004
Submitted: August 18, 2004
Operation: Air carrier
Aircraft: N664DN
Make and model: Boeing 757232
Aircraft serial: 25012
Aircraft time: 46,171 hours, 22,162 cycles
System (JASC): 2133 · Pressure Regulator/Outflow Valve
Part: Outflow Valve
Condition: Failed
Location: Cabin Pressure
Stage of operation: CL
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

CLIMBING THRU 20K LT PACK OFF LT ILLUM. RAN PACK OFF CKLIST STATUS MSG AUTO 1 INOP FOLLOWED BY RED CABIN ALT LT AND EICAS AUTO 2 INOP. EMERGENCY DESCENT TO 10K AND CABIN AUTO INOP. CHECKLIST COMPLETE. OUTFLOW VLV OBSERVED CLOSED. LT PACK TURNED ON APPEARED NORMAL. LANDED WITH PRESS IN MANUAL. T/S PER FIM, PRESS A/C WITH ENGS AT PWR. REPLACED FLOW CONTROL VLV PER MM BORROWED FROM UAL. RT PACK CHECKS OK. CLEARED AUTO 1 INOP MSG. REPLACED NR 2 PRESS CONT PER MM AS PRECAUTION.