A321 flight crew experiences a red ECAM- auto thrust lock; during level off at 4;000 feet. The capta...

Attributes
ACN	1306400
Time
Date	201510
Local Time Of Day	0601-1200
Place
Locale Reference	MCO.Airport
State Reference	FL
Aircraft 1
Make Model Name	A321
Operating Under FAR Part	Part 121
Flight Phase	Initial Approach
Flight Plan	IFR
Component
Aircraft Component	Autothrottle/Speed Control
Person 1
Function	Pilot Not Flying Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Person 2
Function	First Officer Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Altitude Excursion From Assigned Altitude Deviation - Procedural Published Material / Policy Deviation - Speed All Types

Narrative:

I was advised after the fact that we had a slat over speed of eleven knots. I did write up a five knot over speed in the aircraft maintenance log (aml). First officer was the flying pilot. Aircraft leveled at four thousand feet on downwind to 18R. Left engine stayed in idle while right engine accelerated. Soon thereafter; red ECAM- auto thrust lock. Accomplished ECAM procedure which quickly accelerated left engine to match the right engine which was developing more thrust due to left engine at idle. Due to all this rapid acceleration; speed went above slat speed. I quickly retracted the slats. During all this; we also deviated three hundred feet off our altitude when the autopilot was turned off.

Original NASA ASRS Text

Title: A321 flight crew experiences a red ECAM- auto thrust lock; during level off at 4;000 feet. The Captain performs the ECAM actions which causes a rapid increase in thrust and an over speed of the slats.

Narrative: I was advised after the fact that we had a slat over speed of eleven knots. I did write up a five knot over speed in the Aircraft Maintenance Log (AML). FO was the flying pilot. Aircraft leveled at four thousand feet on downwind to 18R. Left engine stayed in idle while right engine accelerated. Soon thereafter; red ECAM- auto thrust lock. Accomplished ECAM procedure which quickly accelerated left engine to match the right engine which was developing more thrust due to left engine at idle. Due to all this rapid acceleration; speed went above slat speed. I quickly retracted the slats. During all this; we also deviated three hundred feet off our altitude when the autopilot was turned off.

Data retrieved from NASA's ASRS site 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.

A321 flight crew experiences a red ECAM- auto thrust lock; during level off at 4;000 feet. The captain performs the ECAM actions which causes a rapid increase in thrust and an over speed of the slats.