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B737-700 crew did not realize the flaps had not extended until they got a GPWS warning, and a stick shaker at approximately 500 ft at mia.
| Attributes | |
| ACN | 553919 |
| Time | |
| Date | 200207 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : mia.airport |
| State Reference | FL |
| Altitude | agl single value : 500 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : mia.tower |
| Operator | common carrier : air carrier |
| Make Model Name | B737-700 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | descent : approach landing : go around |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 553919 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| ASRS Report | 554338 |
| Events | |
| Anomaly | aircraft equipment problem : critical non adherence : company policies non adherence : published procedure other anomaly other anomaly other |
| Independent Detector | aircraft equipment : gpws aircraft equipment other aircraft equipment : stickshaker warning other flight crewa other flight crewb |
| Resolutory Action | controller : issued new clearance controller : provided flight assist flight crew : executed go around other |
| Consequence | other other |
| Supplementary | |
| Problem Areas | Aircraft Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
Narrative:
Flap problem. On final, experienced buffet warning and received GPWS alert. Looked at flap indicator and read zero degrees flaps. Go around initiated on short final. After level on missed approach, tried flap extension again and they did not come down. Used alternate method and landed uneventfully flaps 15 degrees. Supplemental information from acn 554338: on final approach, after completing the landing checklist, we received an aural GPWS alert. After looking at the flap position indicator, it was determined the flaps indicated up. The handle indicated down and both the captain and myself acknowledged the flaps to 30 degrees. A missed approach was initiated and the flap handle was set to 15 degrees for the go around and eventually placed to up. The procedures for the alternate flap extension were completed and an uneventful flaps 15 degree landing occurred. I have no information as to whether the flaps ever extended or if they retracted independently.
Original NASA ASRS Text
Title: B737-700 CREW DID NOT REALIZE THE FLAPS HAD NOT EXTENDED UNTIL THEY GOT A GPWS WARNING, AND A STICK SHAKER AT APPROX 500 FT AT MIA.
Narrative: FLAP PROB. ON FINAL, EXPERIENCED BUFFET WARNING AND RECEIVED GPWS ALERT. LOOKED AT FLAP INDICATOR AND READ ZERO DEGS FLAPS. GAR INITIATED ON SHORT FINAL. AFTER LEVEL ON MISSED APCH, TRIED FLAP EXTENSION AGAIN AND THEY DID NOT COME DOWN. USED ALTERNATE METHOD AND LANDED UNEVENTFULLY FLAPS 15 DEGS. SUPPLEMENTAL INFO FROM ACN 554338: ON FINAL APCH, AFTER COMPLETING THE LNDG CHKLIST, WE RECEIVED AN AURAL GPWS ALERT. AFTER LOOKING AT THE FLAP POS INDICATOR, IT WAS DETERMINED THE FLAPS INDICATED UP. THE HANDLE INDICATED DOWN AND BOTH THE CAPT AND MYSELF ACKNOWLEDGED THE FLAPS TO 30 DEGS. A MISSED APCH WAS INITIATED AND THE FLAP HANDLE WAS SET TO 15 DEGS FOR THE GAR AND EVENTUALLY PLACED TO UP. THE PROCS FOR THE ALTERNATE FLAP EXTENSION WERE COMPLETED AND AN UNEVENTFUL FLAPS 15 DEG LNDG OCCURRED. I HAVE NO INFO AS TO WHETHER THE FLAPS EVER EXTENDED OR IF THEY RETRACTED INDEPENDENTLY.
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.