Flight crew aborted takeoff due to erratic pitch trim and erroneous takeoff warning horn.

Attributes
ACN	297531
Time
Date	199502
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : zzz
State Reference	US
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	Commercial Fixed Wing
Operating Under FAR Part	Part 121
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 : 50 flight time total : 5500 flight time type : 3700
ASRS Report	297531
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	aircraft equipment problem : less severe other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : rejected takeoff
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

Aborted takeoff due to pitch trim out of range warning. Noted pitch trim indicator needle fluctuating. Returned to gate and called maintenance control. Maintenance control deferred indicator, one of provisions said pitch trim out of range horn must work. It works, but it indicated a problem exists when in fact one did not (checked status of stabilizer manually). Maintenance clt indicated we could go and we did. However, after much thought, I am not sure. I am sure safety was not compromised, but I am concerned as to the legality of the operation. Note: no out of trim horn was heard, as trim indicator had settled down.

Original NASA ASRS Text

Title: FLC ABORTED TKOF DUE TO ERRATIC PITCH TRIM AND ERRONEOUS TKOF WARNING HORN.

Narrative: ABORTED TKOF DUE TO PITCH TRIM OUT OF RANGE WARNING. NOTED PITCH TRIM INDICATOR NEEDLE FLUCTUATING. RETURNED TO GATE AND CALLED MAINT CTL. MAINT CTL DEFERRED INDICATOR, ONE OF PROVISIONS SAID PITCH TRIM OUT OF RANGE HORN MUST WORK. IT WORKS, BUT IT INDICATED A PROB EXISTS WHEN IN FACT ONE DID NOT (CHKED STATUS OF STABILIZER MANUALLY). MAINT CLT INDICATED WE COULD GO AND WE DID. HOWEVER, AFTER MUCH THOUGHT, I AM NOT SURE. I AM SURE SAFETY WAS NOT COMPROMISED, BUT I AM CONCERNED AS TO THE LEGALITY OF THE OP. NOTE: NO OUT OF TRIM HORN WAS HEARD, AS TRIM INDICATOR HAD SETTLED DOWN.

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.