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Departin sju aircraft did not respond to autoplt inputs, autoplt disconnected, circuit breakers pulled, aircraft controls frozen in left descending turn. Flight crew overpowered controls and returned to sju for landing.
| Attributes | |
| ACN | 162238 |
| Time | |
| Date | 199011 |
| Day | Tue |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : sju |
| State Reference | PR |
| Altitude | msl bound lower : 2200 msl bound upper : 2200 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : sju |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Transport |
| Flight Phase | climbout : intermediate altitude cruise other landing other |
| Route In Use | departure other enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : atp pilot : commercial pilot : cfi |
| Experience | flight time last 90 days : 172 flight time total : 1984 flight time type : 257 |
| ASRS Report | 162238 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : instrument pilot : atp pilot : commercial |
| Events | |
| Anomaly | aircraft equipment problem : critical |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : regained aircraft control flight crew : overcame equipment problem other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
Departing sju to stx in a normal climb heading 075 degree at 1000' MSL, autoplt engaged. Approximately 7-10 mi out and approximately 2000' MSL departure control vectors 120 degree heading. Using the heading knob 120 degree heading was selected with no response (heading knob was reset for second time and no response). At this time the autoplt was disconnected manually and immediately the aircraft took drastic turn to the left and nose down, at this time the autoplt was reset but nothing happens. The autoplt cbs were manually pulled out. The aileron trim was activated manually with no response. At this moment the captain and myself were using man power. Aircraft control was recovered and an emergency landing was made.
Original NASA ASRS Text
Title: DEPARTIN SJU ACFT DID NOT RESPOND TO AUTOPLT INPUTS, AUTOPLT DISCONNECTED, CIRCUIT BREAKERS PULLED, ACFT CTLS FROZEN IN LEFT DESCENDING TURN. FLC OVERPOWERED CTLS AND RETURNED TO SJU FOR LNDG.
Narrative: DEPARTING SJU TO STX IN A NORMAL CLB HDG 075 DEG AT 1000' MSL, AUTOPLT ENGAGED. APPROX 7-10 MI OUT AND APPROX 2000' MSL DEP CTL VECTORS 120 DEG HDG. USING THE HDG KNOB 120 DEG HDG WAS SELECTED WITH NO RESPONSE (HDG KNOB WAS RESET FOR SEC TIME AND NO RESPONSE). AT THIS TIME THE AUTOPLT WAS DISCONNECTED MANUALLY AND IMMEDIATELY THE ACFT TOOK DRASTIC TURN TO THE L AND NOSE DOWN, AT THIS TIME THE AUTOPLT WAS RESET BUT NOTHING HAPPENS. THE AUTOPLT CBS WERE MANUALLY PULLED OUT. THE AILERON TRIM WAS ACTIVATED MANUALLY WITH NO RESPONSE. AT THIS MOMENT THE CAPT AND MYSELF WERE USING MAN PWR. ACFT CTL WAS RECOVERED AND AN EMER LNDG WAS MADE.
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.