Air carrier medium large transport altitude deviation overshot during climb when the primary trim mo...

Attributes
ACN	166296
Time
Date	199012
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : chs
State Reference	SC
Altitude	msl bound lower : 2000 msl bound upper : 2400
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : chs
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other
Flight Phase	climbout : intermediate altitude cruise other
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 : 6800
ASRS Report	166296
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Experience	flight time last 90 days : 220 flight time total : 3500
ASRS Report	166297
Events
Anomaly	aircraft equipment problem : critical altitude deviation : overshoot
Independent Detector	other flight crewa
Resolutory Action	aircraft : equipment problem dissipated flight crew : returned to intended course or assigned course flight crew : overcame equipment problem
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

Upon takeoff from charleston, sc, the primary time motor locked out. With takeoff trim and a clearance to 2000', it took both pilots to level the aircraft and we overshot our altitude to about 200' before pushing the plane over to maintain 2000'. The alternate trim worked ok and we regained control using the alternate system. Once the alternate trim was actuated the primary trim started working again and we continued to savannah, GA. Maintenance could not duplicate the problem at sav. There were no known traffic conflicts or departure problems, just a handful of airplane at a low altitude.

Original NASA ASRS Text

Title: ACR MLG ALT DEVIATION OVERSHOT DURING CLIMB WHEN THE PRIMARY TRIM MOTOR LOCKED OUT.

Narrative: UPON TKOF FROM CHARLESTON, SC, THE PRIMARY TIME MOTOR LOCKED OUT. WITH TKOF TRIM AND A CLRNC TO 2000', IT TOOK BOTH PLTS TO LEVEL THE ACFT AND WE OVERSHOT OUR ALT TO ABOUT 200' BEFORE PUSHING THE PLANE OVER TO MAINTAIN 2000'. THE ALTERNATE TRIM WORKED OK AND WE REGAINED CTL USING THE ALTERNATE SYSTEM. ONCE THE ALTERNATE TRIM WAS ACTUATED THE PRIMARY TRIM STARTED WORKING AGAIN AND WE CONTINUED TO SAVANNAH, GA. MAINT COULD NOT DUPLICATE THE PROB AT SAV. THERE WERE NO KNOWN TFC CONFLICTS OR DEP PROBS, JUST A HANDFUL OF AIRPLANE AT A LOW ALT.

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.

Air carrier medium large transport altitude deviation overshot during climb when the primary trim motor locked out.