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An A319 crew, on approach to clt, experienced an unexplained thrust increase and climb with localizer capture.
| Attributes | |
| ACN | 541533 |
| Time | |
| Date | 200203 |
| Day | Thu |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : clt.airport |
| State Reference | NC |
| Altitude | msl bound lower : 3600 msl bound upper : 4300 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : clt.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | A319 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | ils localizer & glide slope : 36r other |
| Flight Phase | descent : approach |
| Route In Use | approach : instrument precision |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 17200 flight time type : 600 |
| ASRS Report | 541533 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 110 flight time total : 7900 flight time type : 120 |
| ASRS Report | 542144 |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude non adherence : clearance non adherence : far non adherence : published procedure other spatial deviation |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | aircraft : automation overrode flight crew flight crew : returned to assigned altitude flight crew : returned to intended or assigned course flight crew : became reoriented flight crew : overrode automation |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Aircraft |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
We were on approach to runway 36R at clt, 8 NM south of lanser intersection. The first officer was PF with the autoplt on. We were given an intercept heading and 'cleared for approach' at 3600 ft MSL. The first officer armed the autoplt for approach. As soon as the localizer captured, the autothrust increased and the aircraft started to climb like it was trying to capture the GS. The first officer disconnected the autoplt to recapture the altitude. The aircraft climbed to 4300 ft before we quickly recovered to 3600 ft. We also slightly overshot the localizer course during this recovery. Once we were back to 3600 ft and on localizer course, we re-engaged the autoplt then reselected the ILS approach. The remainder of the approach was normal. Evidently the autoplt sensed a false GS.
Original NASA ASRS Text
Title: AN A319 CREW, ON APCH TO CLT, EXPERIENCED AN UNEXPLAINED THRUST INCREASE AND CLB WITH LOC CAPTURE.
Narrative: WE WERE ON APCH TO RWY 36R AT CLT, 8 NM S OF LANSER INTXN. THE FO WAS PF WITH THE AUTOPLT ON. WE WERE GIVEN AN INTERCEPT HDG AND 'CLRED FOR APCH' AT 3600 FT MSL. THE FO ARMED THE AUTOPLT FOR APCH. AS SOON AS THE LOC CAPTURED, THE AUTOTHRUST INCREASED AND THE ACFT STARTED TO CLB LIKE IT WAS TRYING TO CAPTURE THE GS. THE FO DISCONNECTED THE AUTOPLT TO RECAPTURE THE ALT. THE ACFT CLBED TO 4300 FT BEFORE WE QUICKLY RECOVERED TO 3600 FT. WE ALSO SLIGHTLY OVERSHOT THE LOC COURSE DURING THIS RECOVERY. ONCE WE WERE BACK TO 3600 FT AND ON LOC COURSE, WE RE-ENGAGED THE AUTOPLT THEN RESELECTED THE ILS APCH. THE REMAINDER OF THE APCH WAS NORMAL. EVIDENTLY THE AUTOPLT SENSED A FALSE GS.
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.