A B737 flight crew abort their takeoff due to an oil filter bypass light.

Attributes
ACN	632773
Time
Date	200410
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : iah.airport
State Reference	TX
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : sna.tower
Operator	common carrier : air carrier
Make Model Name	B737-300
Operating Under FAR Part	Part 121
Flight Phase	ground : takeoff roll ground : taxi ground other : eng start
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain observation : company check pilot oversight : pic
Experience	flight time last 90 days : 240 flight time total : 14000 flight time type : 8000
ASRS Report	632773
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	aircraft equipment other aircraft equipment : oil filter bypass light other flight crewa
Resolutory Action	flight crew : rejected takeoff
Consequence	other
Supplementary
Problem Areas	Flight Crew Human Performance Aircraft
Primary Problem	Aircraft

Narrative:

During engine start on first flight of the day, first officer and I noticed that the oil filter by-pass light was flickering during and after start. After approximately 2 mins the light stayed out. The engine was running for about 8-9 mins before we took runway for takeoff. The temperature was 20 degrees C (70 degrees F). It was the first officer's leg. Power was added and takeoff roll begun. Everything was normal until just prior to 80 KIAS when first officer pointed to the oil filter by-pass light which was illuminated. I aborted the takeoff. We notified tower and cleared runway. We contacted maintenance and explained the situation. By this time light was out again. We coordinated with maintenance and did an engine run-up. All indications were normal and the light remained out. We decided to continue the flight after sending an information-only message to maintenance. They concurred. Everything went normally after that.

Original NASA ASRS Text

Title: A B737 FLT CREW ABORT THEIR TKOF DUE TO AN OIL FILTER BYPASS LIGHT.

Narrative: DURING ENG START ON FIRST FLT OF THE DAY, FO AND I NOTICED THAT THE OIL FILTER BY-PASS LIGHT WAS FLICKERING DURING AND AFTER START. AFTER APPROX 2 MINS THE LIGHT STAYED OUT. THE ENG WAS RUNNING FOR ABOUT 8-9 MINS BEFORE WE TOOK RWY FOR TKOF. THE TEMP WAS 20 DEGS C (70 DEGS F). IT WAS THE FO'S LEG. PWR WAS ADDED AND TKOF ROLL BEGUN. EVERYTHING WAS NORMAL UNTIL JUST PRIOR TO 80 KIAS WHEN FO POINTED TO THE OIL FILTER BY-PASS LIGHT WHICH WAS ILLUMINATED. I ABORTED THE TKOF. WE NOTIFIED TWR AND CLRED RWY. WE CONTACTED MAINT AND EXPLAINED THE SIT. BY THIS TIME LIGHT WAS OUT AGAIN. WE COORDINATED WITH MAINT AND DID AN ENG RUN-UP. ALL INDICATIONS WERE NORMAL AND THE LIGHT REMAINED OUT. WE DECIDED TO CONTINUE THE FLT AFTER SENDING AN INFO-ONLY MESSAGE TO MAINT. THEY CONCURRED. EVERYTHING WENT NORMALLY AFTER THAT.

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.