SDR SWAA114833

Service difficulty report · Control Valve · Boeing 7375H4

Difficulty date: July 5, 2011
Submitted: July 6, 2011
Operation: Air carrier
Aircraft: N508SW
Make and model: Boeing 7375H4
Aircraft serial: 24185
Aircraft time: 65,225 hours, 62,149 cycles
System (JASC): 3610 · Pneumatic Distribution System
Part: Control Valve
Part number: 332A1034
Condition: Faulty
Location: Bleed Air Sys
Stage of operation: DE
How discovered: O
Nature of condition: O
Precautionary procedure: A

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

What was found

DIVERSION/DECLARED EMERGENCY. EMERGENCY DESCENT DUE TO CABIN PRESSURE REACHING 10,000; ALL OTHER COCKPIT INDICATIONS NORMAL. REMOVED AND REPLACED NR 1 ENGINE PRECOOLER CONTROL VALVE, NR 1 ENGINE HIGH STAGE REGULATOR, NR 1 ENGINE HIGH STAGE VALVE, AFT OUTFLOW VALVE PER MM.

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