SDR AALA20071128

Service difficulty report · Check Valve · Boeing 757223

Difficulty date: June 18, 2007
Submitted: June 29, 2007
Operation: Air carrier
Aircraft: N606AA
Make and model: Boeing 757223
Aircraft serial: 27057
System (JASC): 2130 · Cabin Pressure Control System
Part: Check Valve
Condition: Obstructed
Location: Air Conditioning
Stage of operation: CL
How discovered: V
Nature of condition: J
Precautionary procedure: B, A

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

What was found

MIA INFLIGHT T2039/18JUN - DURING CLIMB CABIN ALTITUDE ALERT MESSAGE SOUNDED AND DISPLAYED. CREW MANUALLY DEPLOYED MASKS IN CABIN AND MADE AN EMERGENCY DESCENT. RETURNED TO MIA AND LANDED WITHOUT INCIDENT. FOUND REMOVED BROKEN SECTION OF AIR STRAIGHTENED FROM CHECK VALVE AND REPLACED ALL OXYGEN GENERATORS AND MASKS. REPLACED CABIN ALTITUDE WARNING SWITCH. SYSTEM GROUND CHECKED NORMAL OPERATION.