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Unable to pressurize turboprop medium large transport, air carrier flight crew returns to land at phl only to discover that rear airstair door was not properly closed, even though there was no indication in the cockpit.
| Attributes | |
| ACN | 145241 |
| Time | |
| Date | 199005 |
| Day | Fri |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : phl |
| State Reference | PA |
| Altitude | msl bound lower : 121 msl bound upper : 8500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : phl |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport |
| Flight Phase | climbout : intermediate altitude climbout : takeoff ground : preflight |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : cfi pilot : atp |
| Experience | flight time last 90 days : 80 flight time total : 5000 flight time type : 700 |
| ASRS Report | 145241 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : departure |
| Qualification | controller : radar |
| Events | |
| Anomaly | aircraft equipment problem : less severe |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : exited adverse environment none taken : unable other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
Upon takeoff the aircraft failed to pressurize. The outflow valve was fully closed and both packs had normal pressure. Returned for a normal landing. Mechanics discovered that the air stair door was not fully closed. There was no indication of this in the cockpit wince the annunciator light is hooked up to the latching handle and in no way reflects the actual position of the door. Suggest visual inspection of the door by ground crew when air stairs are used.
Original NASA ASRS Text
Title: UNABLE TO PRESSURIZE TURBOPROP MLG, ACR FLT CREW RETURNS TO LAND AT PHL ONLY TO DISCOVER THAT REAR AIRSTAIR DOOR WAS NOT PROPERLY CLOSED, EVEN THOUGH THERE WAS NO INDICATION IN THE COCKPIT.
Narrative: UPON TKOF THE ACFT FAILED TO PRESSURIZE. THE OUTFLOW VALVE WAS FULLY CLOSED AND BOTH PACKS HAD NORMAL PRESSURE. RETURNED FOR A NORMAL LNDG. MECHS DISCOVERED THAT THE AIR STAIR DOOR WAS NOT FULLY CLOSED. THERE WAS NO INDICATION OF THIS IN THE COCKPIT WINCE THE ANNUNCIATOR LIGHT IS HOOKED UP TO THE LATCHING HANDLE AND IN NO WAY REFLECTS THE ACTUAL POS OF THE DOOR. SUGGEST VISUAL INSPECTION OF THE DOOR BY GND CREW WHEN AIR STAIRS ARE USED.
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.