B727 low speed abort at pdx.

Attributes
ACN	439315
Time
Date	199906
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : pdx.airport
State Reference	OR
Altitude	agl single value : 0
Environment
Flight Conditions	Mixed
Weather Elements	Rain
Light	Daylight
Aircraft 1
Controlling Facilities	tower : pdx.tower
Operator	common carrier : air carrier
Make Model Name	B727 Undifferentiated or Other Model
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
Qualification	pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 300 flight time total : 6500 flight time type : 175
ASRS Report	439315
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	other flight crewa other flight crewb
Resolutory Action	flight crew : rejected takeoff
Consequence	other
Supplementary
Problem Areas	Aircraft Environmental Factor Maintenance Human Performance
Primary Problem	Aircraft

Narrative:

On initial takeoff roll the captain had trouble setting the power using the EPR gauges. I assisted and we got the EPR settings to stabilize on the bug settings. I then noticed the N1 rotor speeds all read about 85% -- normal takeoff power readings are 95%. I brought this to the captain's attention and he aborted the takeoff. Our speed had topped out at 75 KTS during our initial roll. We returned to the ramp and wrote up the anomalous engine readings. The next day our mechanics told us they had removed a large amount of insects and related material from the tubes and lines associated with the probes that provide the pressure readings for the EPR gauges. We also found out at that point that the airplane had sat several days without engine covers or plugs. I believe this whole incident could have been avoided if procedures regarding long-term aircraft parking had been followed.

Original NASA ASRS Text

Title: B727 LOW SPD ABORT AT PDX.

Narrative: ON INITIAL TKOF ROLL THE CAPT HAD TROUBLE SETTING THE PWR USING THE EPR GAUGES. I ASSISTED AND WE GOT THE EPR SETTINGS TO STABILIZE ON THE BUG SETTINGS. I THEN NOTICED THE N1 ROTOR SPDS ALL READ ABOUT 85% -- NORMAL TKOF PWR READINGS ARE 95%. I BROUGHT THIS TO THE CAPT'S ATTN AND HE ABORTED THE TKOF. OUR SPD HAD TOPPED OUT AT 75 KTS DURING OUR INITIAL ROLL. WE RETURNED TO THE RAMP AND WROTE UP THE ANOMALOUS ENG READINGS. THE NEXT DAY OUR MECHS TOLD US THEY HAD REMOVED A LARGE AMOUNT OF INSECTS AND RELATED MATERIAL FROM THE TUBES AND LINES ASSOCIATED WITH THE PROBES THAT PROVIDE THE PRESSURE READINGS FOR THE EPR GAUGES. WE ALSO FOUND OUT AT THAT POINT THAT THE AIRPLANE HAD SAT SEVERAL DAYS WITHOUT ENG COVERS OR PLUGS. I BELIEVE THIS WHOLE INCIDENT COULD HAVE BEEN AVOIDED IF PROCS REGARDING LONG-TERM ACFT PARKING HAD BEEN FOLLOWED.

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.