Aborted takeoff, possible false warning.

Attributes
ACN	276787
Time
Date	199407
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : ilm
State Reference	NC
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	Fokker 100
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : flight engineer pilot : commercial pilot : cfi pilot : atp
Experience	flight time last 90 days : 180 flight time total : 11300 flight time type : 3500
ASRS Report	276787
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 240 flight time total : 13000 flight time type : 2500
ASRS Report	276785
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : rejected takeoff
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

Upon takeoff, toga power at 50 KTS, a lift dumper unsafe warning sounded, (3 bell warning) I immediately rejected the takeoff with reverse thrust, but minimal braking to slow and clear the runway at midfield. The lift dumper fault had cleared itself prior to the stop. No maintenance is available at ilm and the warning had not continued, so I elected to perform the pre-takeoff checklist once again. With no discrepancies, once again we taxied back for takeoff again on runway 24. The takeoff was normal until climbing out of 2000 ft AGL then the 'lifted unsafe' warning occurred again on right MFDU. The procedure was accomplished. No abnormal aircraft performance was noted, and the flight continued to charlotte. I elected to land on the long runway 18R at charlotte, all proceeded normally, landing without lift dumpers. Our aircraft, an F-100 had performed normally for the 4 flts prior to this one, the lift dumper warning was at first intermittent (bad switch sensing expected). So that is why the flight was continued. Supplemental information from acn 276785: lift-dumper unsafe warning is a triple-chime alert and requires that we abort.

Original NASA ASRS Text

Title: ABORTED TKOF, POSSIBLE FALSE WARNING.

Narrative: UPON TKOF, TOGA PWR AT 50 KTS, A LIFT DUMPER UNSAFE WARNING SOUNDED, (3 BELL WARNING) I IMMEDIATELY REJECTED THE TKOF WITH REVERSE THRUST, BUT MINIMAL BRAKING TO SLOW AND CLR THE RWY AT MIDFIELD. THE LIFT DUMPER FAULT HAD CLRED ITSELF PRIOR TO THE STOP. NO MAINT IS AVAILABLE AT ILM AND THE WARNING HAD NOT CONTINUED, SO I ELECTED TO PERFORM THE PRE-TKOF CHKLIST ONCE AGAIN. WITH NO DISCREPANCIES, ONCE AGAIN WE TAXIED BACK FOR TKOF AGAIN ON RWY 24. THE TKOF WAS NORMAL UNTIL CLBING OUT OF 2000 FT AGL THEN THE 'LIFTED UNSAFE' WARNING OCCURRED AGAIN ON R MFDU. THE PROC WAS ACCOMPLISHED. NO ABNORMAL ACFT PERFORMANCE WAS NOTED, AND THE FLT CONTINUED TO CHARLOTTE. I ELECTED TO LAND ON THE LONG RWY 18R AT CHARLOTTE, ALL PROCEEDED NORMALLY, LNDG WITHOUT LIFT DUMPERS. OUR ACFT, AN F-100 HAD PERFORMED NORMALLY FOR THE 4 FLTS PRIOR TO THIS ONE, THE LIFT DUMPER WARNING WAS AT FIRST INTERMITTENT (BAD SWITCH SENSING EXPECTED). SO THAT IS WHY THE FLT WAS CONTINUED. SUPPLEMENTAL INFO FROM ACN 276785: LIFT-DUMPER UNSAFE WARNING IS A TRIPLE-CHIME ALERT AND REQUIRES THAT WE ABORT.

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.