Altitude deviation altitude excursion during an aircraft equipment problem within the autoplt in an ...

Attributes
ACN	303727
Time
Date	199505
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : mia
State Reference	FL
Altitude	msl bound lower : 9000 msl bound upper : 9400
Environment
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : mia
Operator	common carrier : air carrier
Make Model Name	A300
Operating Under FAR Part	Part 121
Navigation In Use	Other
Flight Phase	cruise other descent other other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
ASRS Report	303727
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : less severe altitude deviation : excursion from assigned altitude non adherence : clearance other anomaly
Independent Detector	other flight crewa
Resolutory Action	flight crew : regained aircraft control flight crew : overcame equipment problem flight crew : returned to intended course or assigned course
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	Pilot Deviation

Narrative:

In sum: approximately 20 mi southeast of vky descending to 9000 ft. Altitude capture worked but autothrottle had been disconnected. As captain applied power at leveloff the nose pitched up and the aircraft climbed back up to 9400 ft as captain pushed nose over to stop the climb. I am not sure yet why, the aircraft climbed as power was applied at leveloff after descent but the power application resulted in a climb instead of airspeed maintenance. I will certainly monitor pitch more closely on all attitude and flight condition changes but am concerned as to why the autoplt reversed a descent to a climb upon initial throttle application. Perhaps I missed something. Would appreciate any feedback by those in the know.

Original NASA ASRS Text

Title: ALTDEV ALT EXCURSION DURING AN ACFT EQUIP PROB WITHIN THE AUTOPLT IN AN A-300.

Narrative: IN SUM: APPROX 20 MI SE OF VKY DSNDING TO 9000 FT. ALT CAPTURE WORKED BUT AUTOTHROTTLE HAD BEEN DISCONNECTED. AS CAPT APPLIED PWR AT LEVELOFF THE NOSE PITCHED UP AND THE ACFT CLBED BACK UP TO 9400 FT AS CAPT PUSHED NOSE OVER TO STOP THE CLB. I AM NOT SURE YET WHY, THE ACFT CLBED AS PWR WAS APPLIED AT LEVELOFF AFTER DSCNT BUT THE PWR APPLICATION RESULTED IN A CLB INSTEAD OF AIRSPD MAINT. I WILL CERTAINLY MONITOR PITCH MORE CLOSELY ON ALL ATTITUDE AND FLT CONDITION CHANGES BUT AM CONCERNED AS TO WHY THE AUTOPLT REVERSED A DSCNT TO A CLB UPON INITIAL THROTTLE APPLICATION. PERHAPS I MISSED SOMETHING. WOULD APPRECIATE ANY FEEDBACK BY THOSE IN THE KNOW.

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.

Altitude deviation altitude excursion during an aircraft equipment problem within the autoplt in an A-300.