SDR TRBA2007027

Service difficulty report · Flapper Valve · Aerosp ATR72212A

Difficulty date: May 21, 2007
Submitted: May 24, 2007
Operation: Air carrier
Aircraft: N538AT
Make and model: Aerosp ATR72212A
Aircraft serial: 538
Aircraft time: 15,259 hours, 17,737 cycles
System (JASC): 2120 · Air Distribution System
Part: Flapper Valve
Part number: 41125A01
Part serial: UNREADABLE
Condition: Broken
Location: Ground Air
Stage of operation: CR
How discovered: O
Nature of condition: O
Precautionary procedure: B

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

What was found

LOUD POP NOISE AT 15,000 FT FOLLOWED BY RAPID DECOMPRESSION. DESCENT MADE TO BELOW 10,000 FT, UNABLE TO PRESSURIZE FOR REMAINDER OF FLIGHT. REPLACED AIR GROUND CONNECTION FLAPPER VALVE AS PER MM 21-22-27. PERFORMED MANUAL PRESS CONTROLLER SYSTEM OPT AS PER JIC 21-31-00.

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