Flight crew sets takeoff power with power levers. Autothrottles advance power asymmetrically causing...

Attributes
ACN	547386
Time
Date	200205
Day	Tue
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : mia.airport
State Reference	FL
Altitude	agl single value : 0
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	A300
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	ground : takeoff roll
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	547386
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : multi engine pilot : commercial
ASRS Report	547387
Events
Anomaly	aircraft equipment problem : less severe
Independent Detector	other flight crewa
Resolutory Action	aircraft : equipment problem dissipated controller : provided flight assist flight crew : rejected takeoff flight crew : overcame equipment problem
Consequence	other
Supplementary
Problem Areas	Aircraft Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

On taking runway, advancing and activating autothrottles, aircraft began to veer to right due to asymmetrical thrust. As I corrected to left, #2 engine came up and the aircraft veered to the left. Not extreme, but when I got aircraft straightened out, I found that takeoff power N1 setting had not been reached and throttles had declutched. Realizing that I could set power manually, it also occurred to me that I did not know how much runway I had left. Due to confusion, I aborted the takeoff. Was approximately 90 KTS, so autobrakes activated. Should have disengaged them first. Told tower immediately. Aircraft on final went around. Taxied to pad. Got a hot brake light, called and conferred with maintenance. Decided to go again due to perceived autothrottle problem. Had maintenance come and check #7 wheel which was overheating. Checked chart and constraints. Turned out #7 brake temperature indicator was erroneous, but waited till temperature came down below 150 degrees to attempt takeoff again. On next takeoff roll, autothrottles came up evenly but again did not reach prescribed takeoff power. Set manually and continued on to bog.

Original NASA ASRS Text

Title: FLC SETS TKOF PWR WITH PWR LEVERS. AUTOTHROTTLES ADVANCE PWR ASYMMETRICALLY CAUSING ACFT TO VEER. FLC ABORTS TKOF.

Narrative: ON TAKING RWY, ADVANCING AND ACTIVATING AUTOTHROTTLES, ACFT BEGAN TO VEER TO R DUE TO ASYMMETRICAL THRUST. AS I CORRECTED TO L, #2 ENG CAME UP AND THE ACFT VEERED TO THE L. NOT EXTREME, BUT WHEN I GOT ACFT STRAIGHTENED OUT, I FOUND THAT TKOF PWR N1 SETTING HAD NOT BEEN REACHED AND THROTTLES HAD DECLUTCHED. REALIZING THAT I COULD SET PWR MANUALLY, IT ALSO OCCURRED TO ME THAT I DID NOT KNOW HOW MUCH RWY I HAD LEFT. DUE TO CONFUSION, I ABORTED THE TKOF. WAS APPROX 90 KTS, SO AUTOBRAKES ACTIVATED. SHOULD HAVE DISENGAGED THEM FIRST. TOLD TWR IMMEDIATELY. ACFT ON FINAL WENT AROUND. TAXIED TO PAD. GOT A HOT BRAKE LIGHT, CALLED AND CONFERRED WITH MAINT. DECIDED TO GO AGAIN DUE TO PERCEIVED AUTOTHROTTLE PROB. HAD MAINT COME AND CHK #7 WHEEL WHICH WAS OVERHEATING. CHKED CHART AND CONSTRAINTS. TURNED OUT #7 BRAKE TEMP INDICATOR WAS ERRONEOUS, BUT WAITED TILL TEMP CAME DOWN BELOW 150 DEGS TO ATTEMPT TKOF AGAIN. ON NEXT TKOF ROLL, AUTOTHROTTLES CAME UP EVENLY BUT AGAIN DID NOT REACH PRESCRIBED TKOF PWR. SET MANUALLY AND CONTINUED ON TO BOG.

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.

Flight crew sets takeoff power with power levers. Autothrottles advance power asymmetrically causing aircraft to veer. Flight crew aborts takeoff.