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The nose landing gear of an large transport failed to extend in the locked down position during final approach until after the landing gear extension was cycled for a third time after a go around.
| Attributes | |
| ACN | 428888 |
| Time | |
| Date | 199902 |
| Day | Sat |
| Local Time Of Day | 0001 To 0600 |
| Place | |
| Locale Reference | airport : dtw.airport |
| State Reference | MI |
| Altitude | msl bound lower : 1000 msl bound upper : 5000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tower : dtw.tower |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : multi engine pilot : instrument pilot : cfi pilot : commercial pilot : flight engineer |
| Experience | flight time last 90 days : 150 flight time total : 9000 flight time type : 1000 |
| ASRS Report | 428888 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : multi engine pilot : instrument pilot : commercial |
| Events | |
| Anomaly | aircraft equipment problem : critical |
| Independent Detector | aircraft equipment other aircraft equipment : lndg gear indicator other flight crewa |
| Resolutory Action | aircraft : equipment problem dissipated flight crew : executed go around |
| Supplementary | |
| Problem Areas | Aircraft Weather |
| Primary Problem | Aircraft |
Narrative:
Final approach phase of landing. At the point of gear extension, captain extended gear, followed by loud bang. Gear fell, nose failed to lock down. Able to recycle gear same consequences. This was confirmed by a gear horn flaps 30 degrees and the failure of nose gear light to illuminate. Request go around indicated to tower (dtw) we needed to dump. They (ATC) gave us a right turn (landing runway 21R), climb to 3100 ft. We were then given 5000 ft for dump altitude. Followed all company emergency procedures and checklist. Third attempt to extend with down and lock was successful. Emergency vehicles were standing by. Landing was uneventful. Possible frozen landing gear, -20 degrees I realized during descent into dtw.
Original NASA ASRS Text
Title: THE NOSE LNDG GEAR OF AN LGT FAILED TO EXTEND IN THE LOCKED DOWN POS DURING FINAL APCH UNTIL AFTER THE LNDG GEAR EXTENSION WAS CYCLED FOR A THIRD TIME AFTER A GAR.
Narrative: FINAL APCH PHASE OF LNDG. AT THE POINT OF GEAR EXTENSION, CAPT EXTENDED GEAR, FOLLOWED BY LOUD BANG. GEAR FELL, NOSE FAILED TO LOCK DOWN. ABLE TO RECYCLE GEAR SAME CONSEQUENCES. THIS WAS CONFIRMED BY A GEAR HORN FLAPS 30 DEGS AND THE FAILURE OF NOSE GEAR LIGHT TO ILLUMINATE. REQUEST GAR INDICATED TO TWR (DTW) WE NEEDED TO DUMP. THEY (ATC) GAVE US A R TURN (LNDG RWY 21R), CLB TO 3100 FT. WE WERE THEN GIVEN 5000 FT FOR DUMP ALT. FOLLOWED ALL COMPANY EMER PROCS AND CHKLIST. THIRD ATTEMPT TO EXTEND WITH DOWN AND LOCK WAS SUCCESSFUL. EMER VEHICLES WERE STANDING BY. LNDG WAS UNEVENTFUL. POSSIBLE FROZEN LNDG GEAR, -20 DEGS I REALIZED DURING DSCNT INTO DTW.
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.