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An MD80 on landing had the automatic spoilers deploy normally then immediately restow with no apparent reason.
| Attributes | |
| ACN | 476340 |
| Time | |
| Date | 200006 |
| Day | Thu |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : zzz.tower |
| Operator | common carrier : air carrier |
| Make Model Name | MD-80 Super 80 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | landing : roll |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 476340 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial pilot : multi engine |
| Events | |
| Anomaly | aircraft equipment problem : critical other anomaly other |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other other |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Aircraft |
| Primary Problem | Aircraft |
Narrative:
On landing at ZZZ the autospoilers deployed normally and then immediately stowed for no apparent reason. The landing was normal, the runway was dry, and there was little crosswind. Manual deployment ok. Crew could feel that spoilers deployed and stowed. Callback conversation with reporter revealed the following information: the reporter stated the autospoilers deployed normally and immediately retracted with no indication of a problem. The reporter said the thrust levers were at the idle stops and did not contribute to the retraction. The reporter stated maintenance replaced a number of units and performed several tests but could not pinpoint an exact failed component. The flight recorder was removed for evaluation and no results have been released or published.
Original NASA ASRS Text
Title: AN MD80 ON LNDG HAD THE AUTO SPOILERS DEPLOY NORMALLY THEN IMMEDIATELY RESTOW WITH NO APPARENT REASON.
Narrative: ON LNDG AT ZZZ THE AUTOSPOILERS DEPLOYED NORMALLY AND THEN IMMEDIATELY STOWED FOR NO APPARENT REASON. THE LNDG WAS NORMAL, THE RWY WAS DRY, AND THERE WAS LITTLE XWIND. MANUAL DEPLOYMENT OK. CREW COULD FEEL THAT SPOILERS DEPLOYED AND STOWED. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE AUTOSPOILERS DEPLOYED NORMALLY AND IMMEDIATELY RETRACTED WITH NO INDICATION OF A PROB. THE RPTR SAID THE THRUST LEVERS WERE AT THE IDLE STOPS AND DID NOT CONTRIBUTE TO THE RETRACTION. THE RPTR STATED MAINT REPLACED A NUMBER OF UNITS AND PERFORMED SEVERAL TESTS BUT COULD NOT PINPOINT AN EXACT FAILED COMPONENT. THE FLT RECORDER WAS REMOVED FOR EVALUATION AND NO RESULTS HAVE BEEN RELEASED OR PUBLISHED.
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.