A320 crew had an engine compressor stall when they advanced power for takeoff.

Attributes
ACN	630266
Time
Date	200409
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : ord.airport
State Reference	IL
Altitude	agl single value : 0
Environment
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	A320
Operating Under FAR Part	Part 121
Flight Phase	ground : takeoff roll
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Experience	flight time total : 14750 flight time type : 2000
ASRS Report	630266
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	aircraft equipment other aircraft equipment : n2 instrument other flight crewa other flight crewb
Resolutory Action	flight crew : rejected takeoff
Consequence	other other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

All operations normal and standard until taking active runway. I moved the power levers to the flex detent and called, set flex. At that moment there was a loud bang from the left side of the aircraft. I immediately rejected the takeoff and cleared the runway at T8. With the aircraft stopped, I asked the first flight attendant to inspect the left side of the aircraft. Also, our attention was drawn to the left engine N2 parameter which was flashing a 7.4 indication. The first flight attendant reported no fire, no visible damage. After securing the left engine as a precautionary measure, the aircraft was returned to the gate.

Original NASA ASRS Text

Title: A320 CREW HAD AN ENG COMPRESSOR STALL WHEN THEY ADVANCED PWR FOR TKOF.

Narrative: ALL OPS NORMAL AND STANDARD UNTIL TAKING ACTIVE RWY. I MOVED THE PWR LEVERS TO THE FLEX DETENT AND CALLED, SET FLEX. AT THAT MOMENT THERE WAS A LOUD BANG FROM THE L SIDE OF THE ACFT. I IMMEDIATELY REJECTED THE TKOF AND CLRED THE RWY AT T8. WITH THE ACFT STOPPED, I ASKED THE FIRST FLT ATTENDANT TO INSPECT THE L SIDE OF THE ACFT. ALSO, OUR ATTN WAS DRAWN TO THE L ENG N2 PARAMETER WHICH WAS FLASHING A 7.4 INDICATION. THE FIRST FLT ATTENDANT RPTED NO FIRE, NO VISIBLE DAMAGE. AFTER SECURING THE L ENG AS A PRECAUTIONARY MEASURE, THE ACFT WAS RETURNED TO THE GATE.

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.