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A canadair CL65 in climb between FL230 and FL240 lost aileron control with autoplt on or off. Control regained after 2 mins.
| Attributes | |
| ACN | 533349 |
| Time | |
| Date | 200112 |
| Day | Sun |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : zzz.artcc |
| State Reference | US |
| Altitude | msl bound lower : 23000 msl bound upper : 24000 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zid.artcc tower : mynn.tower |
| Operator | common carrier : air carrier |
| Make Model Name | Regional Jet CL65, Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | climbout : vacating altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp pilot : cfi pilot : instrument pilot : multi engine technician : powerplant technician : airframe |
| Experience | flight time last 90 days : 50 flight time total : 8000 flight time type : 350 |
| ASRS Report | 533349 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | aircraft equipment problem : critical other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : autoplt message other flight crewa other flight crewb |
| Resolutory Action | flight crew : regained aircraft control |
| Consequence | other other |
| Supplementary | |
| Problem Areas | Aircraft |
| Primary Problem | Aircraft |
Narrative:
During climb from FL235 to FL240, an aileron mistrim indication began. Upon reaching FL240, an autoplt right wing down message began. Captain performed QRH procedure of having me disconnect autoplt and retrim. Upon disengagement of autoplt, found ailerons bound and immovable. Trimmed ailerons very little, re-engaged autoplt, received 'autoplt left wing down.' I requested captain to assess aileron control responses and he agreed problem could be of serious nature. Positive xfer of controls returned to me. Captain contacted maintenance control through radio while I monitored problem which began to improve with decreasing frequency of autoplt messages, after approximately 2 mins with no messages. The captain agreed to me testing system and I found improved control response. Aileron control was regained with normal approach and landing at ZZZ, us. Maintenance performed by company. Following evening, captain and I performed maintenance flight returning this aircraft to ZZZ1 maintenance base with no problems.
Original NASA ASRS Text
Title: A CANADAIR CL65 IN CLB BTWN FL230 AND FL240 LOST AILERON CTL WITH AUTOPLT ON OR OFF. CTL REGAINED AFTER 2 MINS.
Narrative: DURING CLB FROM FL235 TO FL240, AN AILERON MISTRIM INDICATION BEGAN. UPON REACHING FL240, AN AUTOPLT R WING DOWN MESSAGE BEGAN. CAPT PERFORMED QRH PROC OF HAVING ME DISCONNECT AUTOPLT AND RETRIM. UPON DISENGAGEMENT OF AUTOPLT, FOUND AILERONS BOUND AND IMMOVABLE. TRIMMED AILERONS VERY LITTLE, RE-ENGAGED AUTOPLT, RECEIVED 'AUTOPLT L WING DOWN.' I REQUESTED CAPT TO ASSESS AILERON CTL RESPONSES AND HE AGREED PROB COULD BE OF SERIOUS NATURE. POSITIVE XFER OF CTLS RETURNED TO ME. CAPT CONTACTED MAINT CTL THROUGH RADIO WHILE I MONITORED PROB WHICH BEGAN TO IMPROVE WITH DECREASING FREQ OF AUTOPLT MESSAGES, AFTER APPROX 2 MINS WITH NO MESSAGES. THE CAPT AGREED TO ME TESTING SYS AND I FOUND IMPROVED CTL RESPONSE. AILERON CTL WAS REGAINED WITH NORMAL APCH AND LNDG AT ZZZ, US. MAINT PERFORMED BY COMPANY. FOLLOWING EVENING, CAPT AND I PERFORMED MAINT FLT RETURNING THIS ACFT TO ZZZ1 MAINT BASE WITH NO PROBS.
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.