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An A320 on final at 1300 ft with full flaps had excessive vibration. Reselected flaps to flaps 3 degrees; vibration minimal. Found #1 spoiler deactivated improperly.
| Attributes | |
| ACN | 656757 |
| Time | |
| Date | 200505 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | msl single value : 1300 |
| Aircraft 1 | |
| Controlling Facilities | tower : zzz2.tower |
| Operator | common carrier : air carrier |
| Make Model Name | A320 |
| Operating Under FAR Part | Part 121 |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Experience | flight time last 90 days : 81 flight time total : 17322 flight time type : 2339 |
| ASRS Report | 656757 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : non compliance with mel non adherence : far non adherence : published procedure non adherence : company policies |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other other |
| Factors | |
| Maintenance | contributing factor : tooling contributing factor : schedule pressure contributing factor : manuals performance deficiency : inspection performance deficiency : non compliance with legal requirements performance deficiency : testing performance deficiency : logbook entry |
| Supplementary | |
| Problem Areas | Maintenance Human Performance Aircraft Chart Or Publication Environmental Factor |
| Primary Problem | Maintenance Human Performance |
| Situations | |
| Publication | MEL |
Narrative:
Flight X returned to the gate because of an inoperative spoiler. ZZZ1 maintenance isolated and deactivated the #1 spoiler. Takeoff and cruise were normal; as was the descent. On short final about 1300 ft MSL; we selected full flaps and the aircraft started a heavy vibration. We reselected flaps 3 degrees; selected the flaps 3 degrees landing GPWS override switch; and kept the current speed (which was about 160 KTS) and took the autothrottles off and the vibration was minimal. I elected to land and get the aircraft on the ground. Taxi in was uneventful. We contacted ZZZ2 operations and told them we needed to speak with a mechanic and were surprised to find 2 ZZZ1 mechanics who where there working on another aircraft. They studied the problem and found the #1 spoiler had floated causing our problem. They re-deactivated the spoiler. We kept the aircraft and had no further problems with spoiler for the next 3 flts.
Original NASA ASRS Text
Title: AN A320 ON FINAL AT 1300 FT WITH FULL FLAPS HAD EXCESSIVE VIBRATION. RESELECTED FLAPS TO FLAPS 3 DEGS; VIBRATION MINIMAL. FOUND #1 SPOILER DEACTIVATED IMPROPERLY.
Narrative: FLT X RETURNED TO THE GATE BECAUSE OF AN INOP SPOILER. ZZZ1 MAINT ISOLATED AND DEACTIVATED THE #1 SPOILER. TKOF AND CRUISE WERE NORMAL; AS WAS THE DSCNT. ON SHORT FINAL ABOUT 1300 FT MSL; WE SELECTED FULL FLAPS AND THE ACFT STARTED A HVY VIBRATION. WE RESELECTED FLAPS 3 DEGS; SELECTED THE FLAPS 3 DEGS LNDG GPWS OVERRIDE SWITCH; AND KEPT THE CURRENT SPD (WHICH WAS ABOUT 160 KTS) AND TOOK THE AUTOTHROTTLES OFF AND THE VIBRATION WAS MINIMAL. I ELECTED TO LAND AND GET THE ACFT ON THE GND. TAXI IN WAS UNEVENTFUL. WE CONTACTED ZZZ2 OPS AND TOLD THEM WE NEEDED TO SPEAK WITH A MECH AND WERE SURPRISED TO FIND 2 ZZZ1 MECHS WHO WHERE THERE WORKING ON ANOTHER ACFT. THEY STUDIED THE PROB AND FOUND THE #1 SPOILER HAD FLOATED CAUSING OUR PROB. THEY RE-DEACTIVATED THE SPOILER. WE KEPT THE ACFT AND HAD NO FURTHER PROBS WITH SPOILER FOR THE NEXT 3 FLTS.
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.