Medium large transport aborts takeoff as warning horn sounds.

Attributes
ACN	264392
Time
Date	199402
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : lga
State Reference	NY
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Dusk
Aircraft 1
Controlling Facilities	artcc : zmp
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	climbout : takeoff other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 8200 flight time type : 2500
ASRS Report	264392
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : less severe other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : overcame equipment problem
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

As we advanced the throttles for takeoff, the takeoff warning horn sounded. We rejected the takeoff and taxied clear of runway. We checked to see if the flaps, spdbrake, or trim tabs were not set, but everything was set in the correct position for takeoff. I told the captain that we should go back to the gate 3 times. He said there was nothing wrong with the aircraft and that he was going to takeoff. In ground school, it has been suggested that for any rejected takeoff we should return to the gate and make some type of write-up in the logbook. To make a long story short, we re-ran the checklist, made another takeoff, which was uneventful. The only thing we found that might have caused the takeoff horn was the pointer on one of the trim wheels was not aligned with the other pointer. The trim setting that we were using put the line of the pointer close to the limit for takeoff. When a person should return to the gate after an attempted takeoff is not a clearly defined area. Maybe it should be better defined in company training and operations manuals.

Original NASA ASRS Text

Title: MLG ABORTS TKOF AS WARNING HORN SOUNDS.

Narrative: AS WE ADVANCED THE THROTTLES FOR TKOF, THE TKOF WARNING HORN SOUNDED. WE REJECTED THE TKOF AND TAXIED CLR OF RWY. WE CHKED TO SEE IF THE FLAPS, SPDBRAKE, OR TRIM TABS WERE NOT SET, BUT EVERYTHING WAS SET IN THE CORRECT POS FOR TKOF. I TOLD THE CAPT THAT WE SHOULD GO BACK TO THE GATE 3 TIMES. HE SAID THERE WAS NOTHING WRONG WITH THE ACFT AND THAT HE WAS GOING TO TKOF. IN GND SCHOOL, IT HAS BEEN SUGGESTED THAT FOR ANY REJECTED TKOF WE SHOULD RETURN TO THE GATE AND MAKE SOME TYPE OF WRITE-UP IN THE LOGBOOK. TO MAKE A LONG STORY SHORT, WE RE-RAN THE CHKLIST, MADE ANOTHER TKOF, WHICH WAS UNEVENTFUL. THE ONLY THING WE FOUND THAT MIGHT HAVE CAUSED THE TKOF HORN WAS THE POINTER ON ONE OF THE TRIM WHEELS WAS NOT ALIGNED WITH THE OTHER POINTER. THE TRIM SETTING THAT WE WERE USING PUT THE LINE OF THE POINTER CLOSE TO THE LIMIT FOR TKOF. WHEN A PERSON SHOULD RETURN TO THE GATE AFTER AN ATTEMPTED TKOF IS NOT A CLRLY DEFINED AREA. MAYBE IT SHOULD BE BETTER DEFINED IN COMPANY TRAINING AND OPS MANUALS.

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.