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MD80 flight crew reports a faulty gear unsafe aural warning; sounding despite green gear safe lights. Declare emergency and lands safely.
| Attributes | |
| ACN | 805684 |
| Time | |
| Date | 200809 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : zzzz.airport |
| State Reference | FO |
| Altitude | msl single value : 1500 |
| Environment | |
| Flight Conditions | VMC |
| Aircraft 1 | |
| Controlling Facilities | tower : zzz.tower |
| Operator | common carrier : air carrier |
| Make Model Name | MD-80 Series (DC-9-80) Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach landing : go around |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| ASRS Report | 805684 |
| Events | |
| Anomaly | aircraft equipment problem : less severe |
| Independent Detector | aircraft equipment other aircraft equipment : ldg. gear aural wng |
| Resolutory Action | flight crew : executed go around flight crew : landed in emergency condition |
| Consequence | other |
| Supplementary | |
| Problem Areas | Aircraft |
| Primary Problem | Aircraft |
Narrative:
On approach; we put the landing gear down and got 3 green and no red lights. When the flaps were moved to 28 degrees; we received the aural 'landing gear.' we recycled flaps to 23 degrees and the aural warning went away. We again moved flaps to 28 degrees and 40 degrees and again received the aural warning. We did a go around and requested holding offshore to run checklist. No procedure was found; so the captain contacted maintenance. They could not find a procedure either and could not help us. We both felt sure the gear was down and locked. We declared an emergency and requested emergency equipment to stand by. We made a normal landing with the aural warning on. During taxi in; we pulled the ground proximity 'circuit breaker' with no result; and then pulled the conflict alert warning system circuit breaker and that silenced the warning. This done from the abnormal landing gear confign procedure.
Original NASA ASRS Text
Title: MD80 FLT CREW REPORTS A FAULTY GEAR UNSAFE AURAL WARNING; SOUNDING DESPITE GREEN GEAR SAFE LIGHTS. DECLARE EMERGENCY AND LANDS SAFELY.
Narrative: ON APCH; WE PUT THE LNDG GEAR DOWN AND GOT 3 GREEN AND NO RED LIGHTS. WHEN THE FLAPS WERE MOVED TO 28 DEGS; WE RECEIVED THE AURAL 'LNDG GEAR.' WE RECYCLED FLAPS TO 23 DEGS AND THE AURAL WARNING WENT AWAY. WE AGAIN MOVED FLAPS TO 28 DEGS AND 40 DEGS AND AGAIN RECEIVED THE AURAL WARNING. WE DID A GAR AND REQUESTED HOLDING OFFSHORE TO RUN CHKLIST. NO PROC WAS FOUND; SO THE CAPT CONTACTED MAINT. THEY COULD NOT FIND A PROC EITHER AND COULD NOT HELP US. WE BOTH FELT SURE THE GEAR WAS DOWN AND LOCKED. WE DECLARED AN EMER AND REQUESTED EMER EQUIP TO STAND BY. WE MADE A NORMAL LNDG WITH THE AURAL WARNING ON. DURING TAXI IN; WE PULLED THE GND PROX 'CIRCUIT BREAKER' WITH NO RESULT; AND THEN PULLED THE CONFLICT ALERT WARNING SYS CIRCUIT BREAKER AND THAT SILENCED THE WARNING. THIS DONE FROM THE ABNORMAL LNDG GEAR CONFIGN PROC.
Data retrieved from NASA's ASRS site as of May 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.