Commuter aircraft has warning horn on takeoff roll. Aborts.

Attributes
ACN	249951
Time
Date	199308
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : bos
State Reference	MA
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Medium Transport, High Wing, 2 Turboprop Eng
Flight Phase	climbout : takeoff other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 10000 flight time type : 2000
ASRS Report	249951
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	non adherence other other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	other
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

During the takeoff roll on runway 4L the takeoff warning horn sounded just prior to or at V1. I called for the abort and the first officer aborted. After clearing the runway we investigated the problem. We discovered that the first officer added some nose up trim late in the takeoff roll which in turn put the elevator trim just out of the takeoff trim limits. The trim was reset and a brief runup indicated that the problem was resolved and the next takeoff went off without any problem.

Original NASA ASRS Text

Title: COMMUTER ACFT HAS WARNING HORN ON TKOF ROLL. ABORTS.

Narrative: DURING THE TKOF ROLL ON RWY 4L THE TKOF WARNING HORN SOUNDED JUST PRIOR TO OR AT V1. I CALLED FOR THE ABORT AND THE FO ABORTED. AFTER CLRING THE RWY WE INVESTIGATED THE PROB. WE DISCOVERED THAT THE FO ADDED SOME NOSE UP TRIM LATE IN THE TKOF ROLL WHICH IN TURN PUT THE ELEVATOR TRIM JUST OUT OF THE TKOF TRIM LIMITS. THE TRIM WAS RESET AND A BRIEF RUNUP INDICATED THAT THE PROB WAS RESOLVED AND THE NEXT TKOF WENT OFF WITHOUT ANY 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.