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A320 first officer reports dual elac failure during approach accompanied by jam stabilizer ECAM. Alternate law and manual pitch trim are available and normal landing ensues.
| Attributes | |
| ACN | 799949 |
| Time | |
| Date | 200808 |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | msl single value : 3000 |
| Aircraft 1 | |
| Controlling Facilities | tracon : zzz.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | A320 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach |
| Route In Use | approach : visual |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Experience | flight time last 90 days : 45 flight time total : 6000 flight time type : 2000 |
| ASRS Report | 799949 |
| Events | |
| Anomaly | aircraft equipment problem : less severe |
| Independent Detector | aircraft equipment other aircraft equipment : ecam other flight crewa |
| Resolutory Action | none taken : insufficient time |
| Supplementary | |
| Problem Areas | Aircraft |
| Primary Problem | Aircraft |
Narrative:
Flight control malfunction: the captain was hand flying the turn to base leg for a visual approach to ZZZ runway 7R when we received an amber flight control elac 2 pitch fault ECAM annunciation. Shortly after accomplishing the ECAM SOP for this fault; a second ECAM was displayed for an elac 1 fault followed immediately by a flight control stabilizer jam ECAM and flight control alternate law. All ECAM actions were accomplished with manual pitch trim found to be available. The flight control system degraded to direct law per the flight manual after landing gear extension and the landing was uneventful. Callback conversation with reporter revealed the following information: unfortunately; a power interruption occurred after the aircraft was parked at the gate which erased all the stored maintenance data. Tests revealed that there were disagreements between the ths position sensors but that they were within limits. Maintenance replaced both elac's to return the aircraft to service.
Original NASA ASRS Text
Title: A320 FO REPORTS DUAL ELAC FAILURE DURING APPROACH ACCOMPANIED BY JAM STABILIZER ECAM. ALTERNATE LAW AND MANUAL PITCH TRIM ARE AVAILABLE AND NORMAL LANDING ENSUES.
Narrative: FLT CTL MALFUNCTION: THE CAPT WAS HAND FLYING THE TURN TO BASE LEG FOR A VISUAL APCH TO ZZZ RWY 7R WHEN WE RECEIVED AN AMBER FLT CTL ELAC 2 PITCH FAULT ECAM ANNUNCIATION. SHORTLY AFTER ACCOMPLISHING THE ECAM SOP FOR THIS FAULT; A SECOND ECAM WAS DISPLAYED FOR AN ELAC 1 FAULT FOLLOWED IMMEDIATELY BY A FLT CTL STABILIZER JAM ECAM AND FLT CTL ALTERNATE LAW. ALL ECAM ACTIONS WERE ACCOMPLISHED WITH MANUAL PITCH TRIM FOUND TO BE AVAILABLE. THE FLT CTL SYS DEGRADED TO DIRECT LAW PER THE FLT MANUAL AFTER LNDG GEAR EXTENSION AND THE LNDG WAS UNEVENTFUL. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: UNFORTUNATELY; A POWER INTERRUPTION OCCURRED AFTER THE ACFT WAS PARKED AT THE GATE WHICH ERASED ALL THE STORED MAINTENANCE DATA. TESTS REVEALED THAT THERE WERE DISAGREEMENTS BETWEEN THE THS POSITION SENSORS BUT THAT THEY WERE WITHIN LIMITS. MAINTENANCE REPLACED BOTH ELAC'S TO RETURN THE ACFT TO SERVICE.
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.