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A B737 flight crew returned to land when the aircraft would not pressurize and they heard a loud noise coming from the nosewheel area. Maintenance personnel had been working on the aircraft and had failed to secure the door prior to the flight crew's departure. Return land.
| Attributes | |
| ACN | 329650 |
| Time | |
| Date | 199602 |
| Day | Thu |
| Local Time Of Day | 0001 To 0600 |
| Place | |
| Locale Reference | airport : las |
| State Reference | NV |
| Altitude | agl bound lower : 0 agl bound upper : 1500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tower : las |
| 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 other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : cfi pilot : atp |
| Experience | flight time last 90 days : 230 flight time total : 10000 flight time type : 230 |
| ASRS Report | 329650 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 240 flight time total : 19000 flight time type : 8000 |
| ASRS Report | 329945 |
| Events | |
| Anomaly | non adherence : far other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | other |
| Consequence | Other |
| Supplementary | |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Our aircraft arrived at gate and I proceeded to do the preflight inspection. All was ok. As I proceeded to flight deck began my first officer duties of performance data, clearance and setup flows. During that time maintenance came to flight deck and said they were checking the landing gear warning horn system. They did not explain any details of the test. After everything was complete we pushed from gate, taxied and proceeded to takeoff. Upon lift-off we heard a very loud noise coming from nosewheel area. The aircraft also would not pressurize, thus, we concluded that possibly the east and east compartment door might be ajar. We had no light indication from the master caution system showing the door to be open, but it was the only thing we could think of. After landing back at our departure airport, maintenance discovered the east and east compartment door open. Apparently they had opened it without advising us and forgot to latch it completely. This happened after my preflight inspection. Maintenance should advise flcs any time they open any panel on the aircraft and should verify to us that it has been closed, or we may have to do additional preflight inspections. Supplemental information from acn 329945: I believe due to draft of air around nose door was kept closed sufficiently to not illuminate door light. Apparently door can appear shut with door light out, but at certain speed unseal door for unpressurized flight.
Original NASA ASRS Text
Title: A B737 FLC RETURNED TO LAND WHEN THE ACFT WOULD NOT PRESSURIZE AND THEY HEARD A LOUD NOISE COMING FROM THE NOSEWHEEL AREA. MAINT PERSONNEL HAD BEEN WORKING ON THE ACFT AND HAD FAILED TO SECURE THE DOOR PRIOR TO THE FLC'S DEP. RETURN LAND.
Narrative: OUR ACFT ARRIVED AT GATE AND I PROCEEDED TO DO THE PREFLT INSPECTION. ALL WAS OK. AS I PROCEEDED TO FLT DECK BEGAN MY FO DUTIES OF PERFORMANCE DATA, CLRNC AND SETUP FLOWS. DURING THAT TIME MAINT CAME TO FLT DECK AND SAID THEY WERE CHKING THE LNDG GEAR WARNING HORN SYS. THEY DID NOT EXPLAIN ANY DETAILS OF THE TEST. AFTER EVERYTHING WAS COMPLETE WE PUSHED FROM GATE, TAXIED AND PROCEEDED TO TKOF. UPON LIFT-OFF WE HEARD A VERY LOUD NOISE COMING FROM NOSEWHEEL AREA. THE ACFT ALSO WOULD NOT PRESSURIZE, THUS, WE CONCLUDED THAT POSSIBLY THE E AND E COMPARTMENT DOOR MIGHT BE AJAR. WE HAD NO LIGHT INDICATION FROM THE MASTER CAUTION SYS SHOWING THE DOOR TO BE OPEN, BUT IT WAS THE ONLY THING WE COULD THINK OF. AFTER LNDG BACK AT OUR DEP ARPT, MAINT DISCOVERED THE E AND E COMPARTMENT DOOR OPEN. APPARENTLY THEY HAD OPENED IT WITHOUT ADVISING US AND FORGOT TO LATCH IT COMPLETELY. THIS HAPPENED AFTER MY PREFLT INSPECTION. MAINT SHOULD ADVISE FLCS ANY TIME THEY OPEN ANY PANEL ON THE ACFT AND SHOULD VERIFY TO US THAT IT HAS BEEN CLOSED, OR WE MAY HAVE TO DO ADDITIONAL PREFLT INSPECTIONS. SUPPLEMENTAL INFO FROM ACN 329945: I BELIEVE DUE TO DRAFT OF AIR AROUND NOSE DOOR WAS KEPT CLOSED SUFFICIENTLY TO NOT ILLUMINATE DOOR LIGHT. APPARENTLY DOOR CAN APPEAR SHUT WITH DOOR LIGHT OUT, BUT AT CERTAIN SPD UNSEAL DOOR FOR UNPRESSURIZED FLT.
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.