After takeoff aircraft would not pressurize. Return land and found radar acces door open. No warning...

Attributes
ACN	166528
Time
Date	199012
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : lax
State Reference	CA
Altitude	agl bound lower : 0 agl bound upper : 2000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : lax tower : san
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	climbout : takeoff ground : preflight
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : private pilot : flight engineer pilot : instrument pilot : commercial pilot : atp
Experience	flight time last 90 days : 250 flight time total : 10000 flight time type : 4000
ASRS Report	166528
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : less severe
Independent Detector	other flight crewa
Resolutory Action	flight crew : declared emergency none taken : unable other
Consequence	Other
Supplementary
Primary Problem	Airport

Narrative:

During preparations for pushback, checklist procedure stopped at 'door lights'. Captain advised ground/pushback crew we had 'equipment' door light. We could hear noises under cockpit which sounded like equipment compartment door being opened and closed. 'Equipment' door light extinguished and pushback/engine start/taxi accomplished. After takeoff clearance we started takeoff roll. At approximately 100 KTS, loud roaring sound started. No engine/system malfunctions noted. No caution or warning lights noted. After rotation noise increased significantly. Captain observed cabin would not pressurize, elected to return to lax. Upon arrival at gate, ground crew advised radar access door open. Still no light indication on 'door light annunciator' panel. Maintenance technician came on board and advised that radar access door is not equipped with switches or hardware to indicate to cockpit crew if door is open. All doors checked closed and flight departed. Normal operation to destination. (Note: chief pilots office researched maintenance specifications and found that radar access door is wired into door annunciator system).

Original NASA ASRS Text

Title: AFTER TKOF ACFT WOULD NOT PRESSURIZE. RETURN LAND AND FOUND RADAR ACCES DOOR OPEN. NO WARNING ON DOOR WARNING PANEL.

Narrative: DURING PREPARATIONS FOR PUSHBACK, CHKLIST PROC STOPPED AT 'DOOR LIGHTS'. CAPT ADVISED GND/PUSHBACK CREW WE HAD 'EQUIP' DOOR LIGHT. WE COULD HEAR NOISES UNDER COCKPIT WHICH SOUNDED LIKE EQUIP COMPARTMENT DOOR BEING OPENED AND CLOSED. 'EQUIP' DOOR LIGHT EXTINGUISHED AND PUSHBACK/ENG START/TAXI ACCOMPLISHED. AFTER TKOF CLRNC WE STARTED TKOF ROLL. AT APPROX 100 KTS, LOUD ROARING SOUND STARTED. NO ENG/SYS MALFUNCTIONS NOTED. NO CAUTION OR WARNING LIGHTS NOTED. AFTER ROTATION NOISE INCREASED SIGNIFICANTLY. CAPT OBSERVED CABIN WOULD NOT PRESSURIZE, ELECTED TO RETURN TO LAX. UPON ARR AT GATE, GND CREW ADVISED RADAR ACCESS DOOR OPEN. STILL NO LIGHT INDICATION ON 'DOOR LIGHT ANNUNCIATOR' PANEL. MAINT TECHNICIAN CAME ON BOARD AND ADVISED THAT RADAR ACCESS DOOR IS NOT EQUIPPED WITH SWITCHES OR HARDWARE TO INDICATE TO COCKPIT CREW IF DOOR IS OPEN. ALL DOORS CHKED CLOSED AND FLT DEPARTED. NORMAL OPERATION TO DEST. (NOTE: CHIEF PLTS OFFICE RESEARCHED MAINT SPECS AND FOUND THAT RADAR ACCESS DOOR IS WIRED INTO DOOR ANNUNCIATOR SYS).

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.

After takeoff aircraft would not pressurize. Return land and found radar acces door open. No warning on door warning panel.