<< >> NASA ASRS Report 183472, July 1991

Unable to pressurize aircraft. Returned and landed ewr. No emergency. No fuel dump. Landing under maximum.

Attributes
ACN	183472
Time
Date	199107
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : ewr
State Reference	NJ
Altitude	agl bound lower : 0 agl bound upper : 6000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : n90
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	climbout : initial climbout : takeoff landing other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : commercial pilot : atp
Experience	flight time last 90 days : 200 flight time total : 16000 flight time type : 2000
ASRS Report	183472
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial pilot : atp
Events
Anomaly	aircraft equipment problem : less severe
Independent Detector	other flight crewa
Resolutory Action	none taken : detected after the fact other
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

The aircraft had overnighted at newark. The first officer conducted a normal preflight exterior inspection of the aircraft. In addition a mechanic came to the cockpit and reported that he had done a walkaround of the aircraft and that everything was normal. Prior to pushback the door lights were checked out as per the checklist. During the taxi check the recall was pushed and no lights came on. After takeoff the aircraft would not pressurize. We leveled off at 6000 ft to investigate and shortly thereafter the master caution and doors light came on. There were no door lights 'on' on the overhead panel so I pressed each individual light and the 'equipment' door light stayed on. We returned to ewr and made an uneventful landing. No fuel was dumped and the aircraft was below landing weight. We did not declare an emergency. Upon arrival at ewr the electronic equipment access door was found to be open. Maintenance was unable to find any fault in the door light system.

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Original NASA ASRS Text

Title: UNABLE TO PRESSURIZE ACFT. RETURNED AND LANDED EWR. NO EMER. NO FUEL DUMP. LNDG UNDER MAX.

Narrative: THE ACFT HAD OVERNIGHTED AT NEWARK. THE FO CONDUCTED A NORMAL PREFLT EXTERIOR INSPECTION OF THE ACFT. IN ADDITION A MECH CAME TO THE COCKPIT AND RPTED THAT HE HAD DONE A WALKAROUND OF THE ACFT AND THAT EVERYTHING WAS NORMAL. PRIOR TO PUSHBACK THE DOOR LIGHTS WERE CHKED OUT AS PER THE CHKLIST. DURING THE TAXI CHK THE RECALL WAS PUSHED AND NO LIGHTS CAME ON. AFTER TKOF THE ACFT WOULD NOT PRESSURIZE. WE LEVELED OFF AT 6000 FT TO INVESTIGATE AND SHORTLY THEREAFTER THE MASTER CAUTION AND DOORS LIGHT CAME ON. THERE WERE NO DOOR LIGHTS 'ON' ON THE OVERHEAD PANEL SO I PRESSED EACH INDIVIDUAL LIGHT AND THE 'EQUIP' DOOR LIGHT STAYED ON. WE RETURNED TO EWR AND MADE AN UNEVENTFUL LNDG. NO FUEL WAS DUMPED AND THE ACFT WAS BELOW LNDG WT. WE DID NOT DECLARE AN EMER. UPON ARR AT EWR THE ELECTRONIC EQUIP ACCESS DOOR WAS FOUND TO BE OPEN. MAINT WAS UNABLE TO FIND ANY FAULT IN THE DOOR LIGHT SYSTEM.

Data retrieved from NASA's ASRS site as of July 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.