SDR SWAA990767

Service difficulty report · Outflow Valve · Boeing 7373H4

Difficulty date: April 27, 1999
Submitted: March 26, 2000
Operation: Air carrier
Aircraft: N339SW
Make and model: Boeing 7373H4
Aircraft serial: 24090
System (JASC): 2133 · Pressure Regulator/Outflow Valve
Part: Outflow Valve
Part number: 6552290
Condition: Obstruction
Location: Cabin
Stage of operation: IN
Nature of condition: O
Precautionary procedure: K

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

What was found

AIR TURNBACK, DURING TAKEOFF, PRESSURIZATION AUTO FAIL LIGHT CAME ON, NO PRESSURIZATION CAPABILITY AT ALL. DISCOVERED A PLASTIC TUBING DEBRIS OBSTRUCTING THE OUTFLOW VALVE TRAVEL. REMOVED OBSTRUCTION, PRESSURIZED AIRCRAFT, OPS CHECKED GOOD PER MM.

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