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Return land situation when gear fails to retract. Post flight inspection reveals gear by-pass valve open or in by- pass position.
| Attributes | |
| ACN | 201643 |
| Time | |
| Date | 199202 |
| Day | Tue |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : dfw |
| State Reference | TX |
| Altitude | agl bound lower : 0 agl bound upper : 800 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tower : dfw tracon : dfw |
| 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 ground : preflight |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 9000 |
| ASRS Report | 201643 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 180 flight time total : 5000 |
| ASRS Report | 201644 |
| Events | |
| Anomaly | aircraft equipment problem : critical non adherence : published procedure other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : unable other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
On takeoff when the gear handle was raised the gear stayed down and locked. Returned to dfw for uneventful landing. Maintenance later told me the landing gear door bypass valve was in the bypass position and this prevented the gear from retracting. My first officer remembers this bypass valve being closed on his walk around. I assume someone opened the bypass valve after the first officer did his walk around and did not close the bypass valve.
Original NASA ASRS Text
Title: RETURN LAND SITUATION WHEN GEAR FAILS TO RETRACT. POST FLT INSPECTION REVEALS GEAR BY-PASS VALVE OPEN OR IN BY- PASS POS.
Narrative: ON TKOF WHEN THE GEAR HANDLE WAS RAISED THE GEAR STAYED DOWN AND LOCKED. RETURNED TO DFW FOR UNEVENTFUL LNDG. MAINT LATER TOLD ME THE LNDG GEAR DOOR BYPASS VALVE WAS IN THE BYPASS POS AND THIS PREVENTED THE GEAR FROM RETRACTING. MY FO REMEMBERS THIS BYPASS VALVE BEING CLOSED ON HIS WALK AROUND. I ASSUME SOMEONE OPENED THE BYPASS VALVE AFTER THE FO DID HIS WALK AROUND AND DID NOT CLOSE THE BYPASS VALVE.
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.