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A B757-200 on approach at 1000 ft declared an emergency due to right main landing gear failed to extend in normal mode. Extended in alternate system.
| Attributes | |
| ACN | 669149 |
| Time | |
| Date | 200508 |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl bound lower : 0 agl bound upper : 1000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Dusk |
| Aircraft 1 | |
| Controlling Facilities | tower : zzz.tower |
| Operator | common carrier : air carrier |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach landing : roll |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| ASRS Report | 669149 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| ASRS Report | 669150 |
| Events | |
| Anomaly | aircraft equipment problem : critical |
| Independent Detector | aircraft equipment other aircraft equipment : right main unsafe warning other flight crewa other flight crewb |
| Resolutory Action | controller : issued new clearance flight crew : declared emergency flight crew : overcame equipment problem |
| Consequence | other other |
| Supplementary | |
| Problem Areas | Chart Or Publication Aircraft |
| Primary Problem | Aircraft |
Narrative:
No right landing gear down verified by tower. Emergency declared. Emergency gear extend. Normal landing at ZZZ. Maintenance pinned gear with tow to gate. Emergency crews on hand. Callback conversation with reporter revealed the following information: the reporter stated when checking back with maintenance the next day; the failed component or components were still not idented and the airplane was still on jacks. Maintenance advised the problem was in the hydraulic sequencing of the unlock; extend mechanism and not a position indicating problem.
Original NASA ASRS Text
Title: A B757-200 ON APCH AT 1000 FT DECLARED AN EMER DUE TO R MAIN LNDG GEAR FAILED TO EXTEND IN NORMAL MODE. EXTENDED IN ALTERNATE SYS.
Narrative: NO R LNDG GEAR DOWN VERIFIED BY TWR. EMER DECLARED. EMER GEAR EXTEND. NORMAL LNDG AT ZZZ. MAINT PINNED GEAR WITH TOW TO GATE. EMER CREWS ON HAND. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED WHEN CHKING BACK WITH MAINT THE NEXT DAY; THE FAILED COMPONENT OR COMPONENTS WERE STILL NOT IDENTED AND THE AIRPLANE WAS STILL ON JACKS. MAINT ADVISED THE PROB WAS IN THE HYD SEQUENCING OF THE UNLOCK; EXTEND MECHANISM AND NOT A POS INDICATING PROB.
Data retrieved from NASA's ASRS site as of January 2009 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.