MD83 crew had the autoplt automatic stabilizer trim malfunction. Both FMC warning lights illuminate. The inlet fuel pressure light illuminate and an autothrottle that drove the aircraft into overspd.

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Attributes
ACN	586624
Time
Date	200306
Day	Sun
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : dtw.airport
State Reference	MI
Altitude	msl bound lower : 12300 msl bound upper : 13000
Environment
Flight Conditions	VMC
Light	Dusk
Aircraft 1
Controlling Facilities	tracon : d21.tracon
Operator	common carrier : air carrier
Make Model Name	MD-83
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : cfi pilot : atp
Experience	flight time last 90 days : 210 flight time total : 5560 flight time type : 1400
ASRS Report	586624
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	aircraft equipment problem : critical altitude deviation : excursion from assigned altitude non adherence : clearance non adherence : company policies non adherence : far non adherence : published procedure
Independent Detector	other flight crewa other flight crewb
Resolutory Action	controller : issued new clearance controller : provided flight assist flight crew : diverted to another airport flight crew : landed as precaution flight crew : returned to assigned altitude
Consequence	other
Supplementary
Problem Areas	Aircraft Flight Crew Human Performance
Primary Problem	Aircraft
Air Traffic Incident	Pilot Deviation

Narrative:

While leveling off at 13000 ft, the autoplt disengaged, and the aircraft pitched up and climbed 300 ft. I then leveled off at 13000 ft, and re-engaged the autoplt. At that point, the aircraft pitched down and lost 700 ft. I proceeded to 'hand fly' (no autoplt). At the same time that the autoplt was malfunctioning, we had a horizon light on both FMS, and a flashing left inlet fuel pressure low light on. So considering all the above, we returned to dtw for an uneventful landing. During this same time frame, we had an overspd warning due to an autothrottle malfunction.

Original NASA ASRS Text

Title: MD83 CREW HAD THE AUTOPLT AUTO STABILIZER TRIM MALFUNCTION. BOTH FMC WARNING LIGHTS ILLUMINATE. THE INLET FUEL PRESSURE LIGHT ILLUMINATE AND AN AUTOTHROTTLE THAT DROVE THE ACFT INTO OVERSPD.

Narrative: WHILE LEVELING OFF AT 13000 FT, THE AUTOPLT DISENGAGED, AND THE ACFT PITCHED UP AND CLBED 300 FT. I THEN LEVELED OFF AT 13000 FT, AND RE-ENGAGED THE AUTOPLT. AT THAT POINT, THE ACFT PITCHED DOWN AND LOST 700 FT. I PROCEEDED TO 'HAND FLY' (NO AUTOPLT). AT THE SAME TIME THAT THE AUTOPLT WAS MALFUNCTIONING, WE HAD A HORIZON LIGHT ON BOTH FMS, AND A FLASHING L INLET FUEL PRESSURE LOW LIGHT ON. SO CONSIDERING ALL THE ABOVE, WE RETURNED TO DTW FOR AN UNEVENTFUL LNDG. DURING THIS SAME TIME FRAME, WE HAD AN OVERSPD WARNING DUE TO AN AUTOTHROTTLE MALFUNCTION.

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.