Flight crew lost control of commuter mdt during climbout from sju. Return land.

Attributes
ACN	162054
Time
Date	199011
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : sju
State Reference	PR
Altitude	msl bound lower : 1000 msl bound upper : 1000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : sju
Operator	common carrier : air carrier
Make Model Name	Medium Transport, Low Wing, 2 Turboprop Eng
Flight Phase	climbout : intermediate altitude
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 110 flight time total : 19814 flight time type : 1641
ASRS Report	162054
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : critical other anomaly
Independent Detector	other flight crewa
Resolutory Action	flight crew : regained aircraft control flight crew : declared emergency
Consequence	Other
Supplementary
Primary Problem	Aircraft

Narrative:

Departing sju to st croix virgin islands in a normal climb, heading 075 degrees, at 1000' MSL, autoplt engaged. Approximately 7-10 mi out and approximately 2200' MSL departure control vectored 120 degree heading. Using the heading knob 120 degrees was selected with no response (heading bug 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 happened. The autoplt circuit breaker's were manually popped out. The aileron trim was activated manually with no response. At this moment the first officer and I using manual power recovered aircraft control. Emergency landing was made.

Original NASA ASRS Text

Title: FLT CREW LOST CTL OF COMMUTER MDT DURING CLIMBOUT FROM SJU. RETURN LAND.

Narrative: DEPARTING SJU TO ST CROIX VIRGIN ISLANDS IN A NORMAL CLB, HDG 075 DEGS, AT 1000' MSL, AUTOPLT ENGAGED. APPROX 7-10 MI OUT AND APPROX 2200' MSL DEP CTL VECTORED 120 DEG HDG. USING THE HDG KNOB 120 DEGS WAS SELECTED WITH NO RESPONSE (HDG BUG WAS RESET FOR SECOND TIME AND NO RESPONSE). AT THIS TIME THE AUTOPLT WAS DISCONNECTED MANUALLY AND IMMEDIATELY THE ACFT TOOK DRASTIC TURN TO THE LEFT AND NOSE DOWN. AT THIS TIME THE AUTOPLT WAS RESET BUT NOTHING HAPPENED. THE AUTOPLT CB'S WERE MANUALLY POPPED OUT. THE AILERON TRIM WAS ACTIVATED MANUALLY WITH NO RESPONSE. AT THIS MOMENT THE F/O AND I USING MANUAL PWR RECOVERED ACFT CTL. 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.