B767-300 aborts takeoff at lax when right engine fails to produce desired thrust.

Attributes
ACN	708857
Time
Date	200609
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : lax.airport
State Reference	CA
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B767-300 and 300 ER
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
Experience	flight time last 90 days : 200 flight time total : 14000 flight time type : 1000
ASRS Report	708857
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	other flight crewa other controllera
Resolutory Action	flight crew : rejected takeoff
Consequence	other other
Supplementary
Problem Areas	Company Aircraft
Primary Problem	Aircraft

Narrative:

After receiving takeoff clearance; I advanced power to approximately 1.10 EPR. Both engines stabilized normally; but when I advanced power toward target reduced EPR of 1.38; the right engine EPR stopped climbing at approximately 1.27 EPR. Meanwhile N2 on the right engine continued to accelerate; attaining 104.0%. The disparity in power was confirmed by the fact that I had to use left rudder to keep the aircraft on the runway centerline. I aborted the takeoff at approximately 70 KTS. We taxied back to the gate and debriefed mechanics. The aircraft had a pre-existing problem with the right eec reflected in the logbook but the problems with the engine were actually so severe that it was unable to produce normal takeoff thrust. After changing aircraft; we continued uneventfully.

Original NASA ASRS Text

Title: B767-300 ABORTS TKOF AT LAX WHEN R ENG FAILS TO PRODUCE DESIRED THRUST.

Narrative: AFTER RECEIVING TKOF CLRNC; I ADVANCED PWR TO APPROX 1.10 EPR. BOTH ENGS STABILIZED NORMALLY; BUT WHEN I ADVANCED PWR TOWARD TARGET REDUCED EPR OF 1.38; THE R ENG EPR STOPPED CLBING AT APPROX 1.27 EPR. MEANWHILE N2 ON THE R ENG CONTINUED TO ACCELERATE; ATTAINING 104.0%. THE DISPARITY IN PWR WAS CONFIRMED BY THE FACT THAT I HAD TO USE L RUDDER TO KEEP THE ACFT ON THE RWY CTRLINE. I ABORTED THE TKOF AT APPROX 70 KTS. WE TAXIED BACK TO THE GATE AND DEBRIEFED MECHS. THE ACFT HAD A PRE-EXISTING PROB WITH THE R EEC REFLECTED IN THE LOGBOOK BUT THE PROBS WITH THE ENG WERE ACTUALLY SO SEVERE THAT IT WAS UNABLE TO PRODUCE NORMAL TKOF THRUST. AFTER CHANGING ACFT; WE CONTINUED UNEVENTFULLY.

Data retrieved from NASA's ASRS site as of January 2009 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.