Service difficulty report · Outflow Valve · Boeing 757232

Difficulty date
April 4, 2006
Submitted
April 13, 2006
Operation
Air carrier
Aircraft
N609DL
Make and model
Boeing 757232
Aircraft serial
22816
Aircraft time
67,891 hours, 34,766 cycles
Part
Outflow Valve
Condition
Leaking
Location
Cabin Pressure
Stage of operation
CR
How discovered
O
Nature of condition
G, J
Precautionary procedure
B

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

What was found

AT FL410 - CABIN ALT WARNING, CABIN ALT EXCEEDED 10,000 FT. OUTFLOW VALVE CLOSED. ALL BLEEDS AND PACKS NORM. RECIRC FAN ON. C/W QRH PROCEDURES. DIVERTED TO MCO. BITE OF CABIN PRESSURE CONTROLLERS 1 AND 2 SHOW NO FAULTS. AMM TASK 05-51-24-702-001 HAS EXCESSIVE PRESSURE LEAK RATE OUT OF LIMITS. FOUND LEAKS AT E/E COOLING VALVE, FWD CARGO DOOR AND OUTFLOW VALVE. REPLACED OVBD EXHAUST VALVE AND RT AND LT FLOW CONTROL VALVES. FWD CARGO DOOR FWD LWR CORNER SEAL OUT OF TRACK.