<< >> NASA ASRS Report 743039, June 2007

Unidentified aircraft type suffers loss of pressure during climb out. Previous incomplete maintenance procedure should have resulted in a restriction to unpressurized flight only.

Attributes
ACN	743039
Time
Date	200706
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : zma.artcc
State Reference	FL
Altitude	msl bound lower : 10000 msl bound upper : 16500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zma.artcc
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	743039
Events
Anomaly	aircraft equipment problem : critical maintenance problem : improper maintenance maintenance problem : improper documentation non adherence : published procedure non adherence : far
Independent Detector	other flight crewa
Resolutory Action	flight crew : diverted to another airport flight crew : overcame equipment problem
Consequence	other
Supplementary
Problem Areas	Aircraft Company
Primary Problem	Aircraft

Narrative:

The aircraft was not repaired appropriately to match the flight release given to me. The aircraft should have been flown unpressurized with a much higher fuel load. We were cleared to 22000 ft. Climbing out of 16500 ft; we heard a swishing noise from the cabin. We told ATC we wanted to maintain 17000 ft. After about 1 min the cabin would not hold the pressure and we heard a louder noise. We put on oxygen masks and communicated to ATC that we wanted 10000 ft. We were cleared to 10000 ft and executed the excessive cabin altitude/rapid depressurization maneuver. At 10000 ft; we completed the QRH and took off the oxygen masks since the aircraft was flying normally. We agreed to divert to fll which was a distance of 150 mi with 16000 pounds of fuel on board. We landed in fll with no further events.

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Original NASA ASRS Text

Title: UNIDENTIFIED ACFT TYPE SUFFERS LOSS OF PRESSURE DURING CLIMB OUT. PREVIOUS INCOMPLETE MAINT PROCEDURE SHOULD HAVE RESULTED IN A RESTRICTION TO UNPRESSURIZED FLT ONLY.

Narrative: THE ACFT WAS NOT REPAIRED APPROPRIATELY TO MATCH THE FLT RELEASE GIVEN TO ME. THE ACFT SHOULD HAVE BEEN FLOWN UNPRESSURIZED WITH A MUCH HIGHER FUEL LOAD. WE WERE CLRED TO 22000 FT. CLBING OUT OF 16500 FT; WE HEARD A SWISHING NOISE FROM THE CABIN. WE TOLD ATC WE WANTED TO MAINTAIN 17000 FT. AFTER ABOUT 1 MIN THE CABIN WOULD NOT HOLD THE PRESSURE AND WE HEARD A LOUDER NOISE. WE PUT ON OXYGEN MASKS AND COMMUNICATED TO ATC THAT WE WANTED 10000 FT. WE WERE CLRED TO 10000 FT AND EXECUTED THE EXCESSIVE CABIN ALT/RAPID DEPRESSURIZATION MANEUVER. AT 10000 FT; WE COMPLETED THE QRH AND TOOK OFF THE OXYGEN MASKS SINCE THE ACFT WAS FLYING NORMALLY. WE AGREED TO DIVERT TO FLL WHICH WAS A DISTANCE OF 150 MI WITH 16000 LBS OF FUEL ON BOARD. WE LANDED IN FLL WITH NO FURTHER EVENTS.

Data retrieved from NASA's ASRS site as of January 2009 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.