20001109019019I

Incident

FAA incident report · Boeing 737-3H4 · Manchester, NH · November 9, 2000

Date
November 9, 2000 · 11:40 local
Place
Manchester, NH
Airport
Manchester Airport-Grenier Indus
Phase of flight
Normal Cruise
Operating rules
Air carrier (Part 121)
Operator
SWAA
Aircraft
N618WN
Reported as
Boeing 7373H4

From the FAA’s Accident/Incident Data System (AIDS), through its Aviation Safety Information Portal, as reported. The NTSB investigates accidents separately, and its record of an accident is the fuller one. The aircraft is matched to the registry by N-number and event date, checked against the reported make and model; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

What happened

The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.

(-23)Enroute from mdw to mht the flight experienced a loss of cabin pressure at flight level 370, during the descend to 10,000 feet the cabin pressure was reported to reach 24,000 feet. The oxygen masks deployed, however there were six psu locations that failed to activate the oxygen generators and start the flow of oxygen. The initial cause of the loss of pressurization was a failure to the cabin outflow valve connector. The connector was replaced and corrected the malfunction of the pressurization system. The cause of the oxygen generator activation failure is still under investigation by the swa, cmu, swa, FAA, aeg, and Boeing.

As the FAA filed it

(-23)ENROUTE FROM MDW TO MHT THE FLIGHT EXPERIENCED A LOSS OF CABIN PRESSURE AT FLIGHT LEVEL 370, DURING THE DESCEND TO 10,000 FEET THE CABIN PRESSURE WAS REPORTED TO REACH 24,000 FEET. THE OXYGEN MASKS DEPLOYED, HOWEVER THERE WERE SIX PSU LOCATIONS THAT FAILED TO ACTIVATE THE OXYGEN GENERATORS AND START THE FLOW OF OXYGEN. THE INITIAL CAUSE OF THE LOSS OF PRESSURIZATION WAS A FAILURE TO THE CABIN OUTFLOW VALVE CONNECTOR. THE CONNECTOR WAS REPLACED AND CORRECTED THE MALFUNCTION OF THE PRESSURIZATION SYSTEM. THE CAUSE OF THE OXYGEN GENERATOR ACTIVATION FAILURE IS STILL UNDER INVESTIGATION BY THE SWA, CMU, SWA, FAA, AEG, AND BOEING.