<< >> NASA ASRS Report 537287, February 2002

An MD80 rejected takeoff at 80 KTS due to right engine pressure ratio indicator stuck at idle with N1 and N2 normal.

Attributes
ACN	537287
Time
Date	200202
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	MD-80 Super 80
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
Qualification	pilot : atp
ASRS Report	537287
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	other flight crewa other flight crewb
Resolutory Action	flight crew : overcame equipment problem
Consequence	other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

While setting takeoff power at ZZZ right engine EPR gauge failed to respond and continued to read idle power as throttles were advanced. N1 and N2 advanced normally. Takeoff was aborted at a speed below 80 KTS. After taxiing clear of runway we troubleshot the EPR gauge with aid of the aircraft flight manual. While all the procedures seemed to be directed to in-flight configns we decided to turn on the engine anti-ice to see if we could regain operation to the affected EPR gauge. This resulted in proper function of the malfunctioning instrument. We took off without incident on the next attempt. With a temperature dew point of 6 degrees/-14 degrees and no visible moisture present use of anti-ice wasn't indicated. However, a short application of engine anti-ice to the affected engine resolved the problem.

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Original NASA ASRS Text

Title: AN MD80 REJECTED TKOF AT 80 KTS DUE TO R ENG PRESSURE RATIO INDICATOR STUCK AT IDLE WITH N1 AND N2 NORMAL.

Narrative: WHILE SETTING TKOF PWR AT ZZZ R ENG EPR GAUGE FAILED TO RESPOND AND CONTINUED TO READ IDLE PWR AS THROTTLES WERE ADVANCED. N1 AND N2 ADVANCED NORMALLY. TKOF WAS ABORTED AT A SPD BELOW 80 KTS. AFTER TAXIING CLR OF RWY WE TROUBLESHOT THE EPR GAUGE WITH AID OF THE ACFT FLT MANUAL. WHILE ALL THE PROCS SEEMED TO BE DIRECTED TO INFLT CONFIGNS WE DECIDED TO TURN ON THE ENG ANTI-ICE TO SEE IF WE COULD REGAIN OP TO THE AFFECTED EPR GAUGE. THIS RESULTED IN PROPER FUNCTION OF THE MALFUNCTIONING INST. WE TOOK OFF WITHOUT INCIDENT ON THE NEXT ATTEMPT. WITH A TEMP DEW POINT OF 6 DEGS/-14 DEGS AND NO VISIBLE MOISTURE PRESENT USE OF ANTI-ICE WASN'T INDICATED. HOWEVER, A SHORT APPLICATION OF ENG ANTI-ICE TO THE AFFECTED ENG RESOLVED THE PROB.

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.