<< >> NASA ASRS Report 102034, January 1989

Air carrier medium large transport unable pressurize after takeoff account airstair not properly stowed. Continued unpressurized to destination.

Attributes
ACN	102034
Time
Date	198901
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : tlh
State Reference	FL
Altitude	msl bound lower : 0 msl bound upper : 5000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zjx tower : jfk
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	climbout : initial climbout : intermediate altitude ground : parked
Route In Use	departure other enroute airway : zjx
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : flight engineer pilot : cfi pilot : atp
Experience	flight time last 90 days : 200 flight time total : 15000 flight time type : 5000
ASRS Report	102403
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	aircraft equipment problem : less severe
Independent Detector	other flight crewa
Resolutory Action	none taken : anomaly accepted
Consequence	Other
Supplementary
Air Traffic Incident	other

Narrative:

We had a ci 'fwd airstair door light stays on.' I informed operations we would need forward airstairs door verified closed visually before I left the gate. It was verified and so reported to me. After takeoff the cabin would not pressurize. Very loud wind noise coming from under floor behind captain's seat. Sent first officer back to verify front door was closed and secure and to advise F/a we were not pressurized. Since the problem was stabilized and I knew what the probable cause was I decided to proceed on to tpa unpressurized at 5000'. We arrived 10 mins late. Maintenance met the aircraft and verified the forward airstairs door had popped open about an inch. The incident was written of in the ships log book and dispatch was notified. On next takeoff all was well.

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Original NASA ASRS Text

Title: ACR MLG UNABLE PRESSURIZE AFTER TKOF ACCOUNT AIRSTAIR NOT PROPERLY STOWED. CONTINUED UNPRESSURIZED TO DESTINATION.

Narrative: WE HAD A CI 'FWD AIRSTAIR DOOR LIGHT STAYS ON.' I INFORMED OPS WE WOULD NEED FORWARD AIRSTAIRS DOOR VERIFIED CLOSED VISUALLY BEFORE I LEFT THE GATE. IT WAS VERIFIED AND SO RPTED TO ME. AFTER TKOF THE CABIN WOULD NOT PRESSURIZE. VERY LOUD WIND NOISE COMING FROM UNDER FLOOR BEHIND CAPT'S SEAT. SENT F/O BACK TO VERIFY FRONT DOOR WAS CLOSED AND SECURE AND TO ADVISE F/A WE WERE NOT PRESSURIZED. SINCE THE PROB WAS STABILIZED AND I KNEW WHAT THE PROBABLE CAUSE WAS I DECIDED TO PROCEED ON TO TPA UNPRESSURIZED AT 5000'. WE ARRIVED 10 MINS LATE. MAINT MET THE ACFT AND VERIFIED THE FORWARD AIRSTAIRS DOOR HAD POPPED OPEN ABOUT AN INCH. THE INCIDENT WAS WRITTEN OF IN THE SHIPS LOG BOOK AND DISPATCH WAS NOTIFIED. ON NEXT TKOF ALL WAS WELL.

Data retrieved from NASA's ASRS site as of August 2007 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.