<< >> NASA ASRS Report 575189, March 2003

A CL65 first officer experiences an altitude deviation when disconnecting the autoplt after receiving an autoplt nose down trim warning while leveling at 8000 ft south of cak, oh.

Attributes
ACN	575189
Time
Date	200303
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : cak.airport
State Reference	OH
Altitude	msl bound lower : 8000 msl bound upper : 8400
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : cak.tracon
Operator	common carrier : air carrier
Make Model Name	Regional Jet 200 ER&LR
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 : commercial
Experience	flight time last 90 days : 100 flight time total : 6000 flight time type : 80
ASRS Report	575189
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	aircraft equipment problem : less severe altitude deviation : excursion from assigned altitude altitude deviation : overshoot non adherence : clearance other anomaly other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : ap warn sys other flight crewa
Resolutory Action	controller : issued advisory flight crew : regained aircraft control flight crew : returned to assigned altitude flight crew : overrode automation
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

After departure from runway 23 we were cleared runway heading to 3000 ft subsequently, then cleared direct bsv after established in the turn, then cleared to 8000 ft. The autoplt was engaged about 7000 ft and began a leveloff at 8000 ft. The aircraft then began a sudden descent with an autoplt nose down trim warning. I disconnected the autoplt and began a recovery. The aircraft, at the point of autoplt disconnect, was nose high trim position that caused the aircraft to balloon past 8000 ft to 8400 ft. I made immediate corrections to 8000 ft. ATC noticed the descent and climb and asked if we needed assistance. The captain advised 'no' and further advised we had experienced an autoplt problem with a nose down trim warning. No further action was taken.

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Original NASA ASRS Text

Title: A CL65 FO EXPERIENCES AN ALTDEV WHEN DISCONNECTING THE AUTOPLT AFTER RECEIVING AN AUTOPLT NOSE DOWN TRIM WARNING WHILE LEVELING AT 8000 FT S OF CAK, OH.

Narrative: AFTER DEP FROM RWY 23 WE WERE CLRED RWY HDG TO 3000 FT SUBSEQUENTLY, THEN CLRED DIRECT BSV AFTER ESTABLISHED IN THE TURN, THEN CLRED TO 8000 FT. THE AUTOPLT WAS ENGAGED ABOUT 7000 FT AND BEGAN A LEVELOFF AT 8000 FT. THE ACFT THEN BEGAN A SUDDEN DSCNT WITH AN AUTOPLT NOSE DOWN TRIM WARNING. I DISCONNECTED THE AUTOPLT AND BEGAN A RECOVERY. THE ACFT, AT THE POINT OF AUTOPLT DISCONNECT, WAS NOSE HIGH TRIM POS THAT CAUSED THE ACFT TO BALLOON PAST 8000 FT TO 8400 FT. I MADE IMMEDIATE CORRECTIONS TO 8000 FT. ATC NOTICED THE DSCNT AND CLB AND ASKED IF WE NEEDED ASSISTANCE. THE CAPT ADVISED 'NO' AND FURTHER ADVISED WE HAD EXPERIENCED AN AUTOPLT PROB WITH A NOSE DOWN TRIM WARNING. NO FURTHER ACTION WAS TAKEN.

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.