<< >> NASA ASRS Report 739793, May 2007

B757-200 flight crew reports inability to achieve planed thrust during takeoff from phx with ensuing rejected takeoff.

Attributes
ACN	739793
Time
Date	200705
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : phx.airport
State Reference	AZ
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B757-200
Operating Under FAR Part	Part 121
Flight Phase	ground : takeoff roll
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
ASRS Report	739793
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	739794
Events
Anomaly	aircraft equipment problem : critical incursion : taxiway non adherence : clearance
Independent Detector	other flight crewa other flight crewb
Resolutory Action	flight crew : rejected takeoff
Consequence	other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

Throttles were advanced and EPR was called for. EPR and autothrust did not engage. Thrust was 'pushed up' to the 'carrot' indicator on the EPR gages manually. Required EPR for takeoff was 1.61 and maximum EPR was 1.70. The 'carrot' on the EPR gauge was indicating 1.51. At 60 KTS captain noticed that EPR was 1.51 and noting difference between required EPR of 1.61 increased thrust to the EPR limit indicator. When thrust was increased to the limit indicator; EPR was showing only 1.60 on both engines; egt on left engine was 838 and right was 808. Noting that maximum thrust of 1.70 was not being produced we rejected the takeoff at approximately 85 KTS. First officer notified the tower of reject; taxied off the runway and complied with air carrier notification procedures for flight attendant and passenger. While trying to coordinate with maintenance; gate; the flight attendants and operations; we missed a call from ground control to hold our position. We taxied to the gate and were met by maintenance. Maximum to thrust was unable to be achieved.

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Original NASA ASRS Text

Title: B757-200 FLT CREW REPORTS INABILITY TO ACHIEVE PLANED THRUST DURING TKOF FROM PHX WITH ENSUING REJECTED TKOF.

Narrative: THROTTLES WERE ADVANCED AND EPR WAS CALLED FOR. EPR AND AUTOTHRUST DID NOT ENGAGE. THRUST WAS 'PUSHED UP' TO THE 'CARROT' INDICATOR ON THE EPR GAGES MANUALLY. REQUIRED EPR FOR TKOF WAS 1.61 AND MAX EPR WAS 1.70. THE 'CARROT' ON THE EPR GAUGE WAS INDICATING 1.51. AT 60 KTS CAPT NOTICED THAT EPR WAS 1.51 AND NOTING DIFFERENCE BTWN REQUIRED EPR OF 1.61 INCREASED THRUST TO THE EPR LIMIT INDICATOR. WHEN THRUST WAS INCREASED TO THE LIMIT INDICATOR; EPR WAS SHOWING ONLY 1.60 ON BOTH ENGS; EGT ON L ENG WAS 838 AND R WAS 808. NOTING THAT MAX THRUST OF 1.70 WAS NOT BEING PRODUCED WE REJECTED THE TKOF AT APPROX 85 KTS. FO NOTIFIED THE TWR OF REJECT; TAXIED OFF THE RWY AND COMPLIED WITH ACR NOTIFICATION PROCS FOR FLT ATTENDANT AND PAX. WHILE TRYING TO COORDINATE WITH MAINT; GATE; THE FLT ATTENDANTS AND OPS; WE MISSED A CALL FROM GND CTL TO HOLD OUR POS. WE TAXIED TO THE GATE AND WERE MET BY MAINT. MAX TO THRUST WAS UNABLE TO BE ACHIEVED.

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.