Narrative:

As we initiated our takeoff roll at valdosta, GA, (runway 35), the first officer called out that a rudder warning caption was showing. I aborted the takeoff, and upon exiting the runway, noted that the right rudder boost switch, was positioned to 'off'. Evidently, while performing the rudder system check prior to takeoff, I failed to switch the right rudder boost back on. The night before we were scheduled for our overnight in valdosta on reduced rest (8 hours). During this time, I estimate that I received about 5:30 sleep. My first officer noted that he did not receive adequate rest either. We were both very fatigued when we dutied in at early am, and I found myself overlooking items that I ordinarily am quite sharp with. The day prior, we had completed a twelve hour duty day with six hours flying, and I found my attention tending to wander. I believe that the FAA regulation allowing scheduled reduced rest periods following long duty days contributes to problems of this nature.

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Original NASA ASRS Text

Title: PIC ABORTS TKOF AS ALERT FO CALLS OUT WARNING FROM ACFT CAPTION PANEL. RIGHT RUDDER BOOST SWITCH WAS NOT ON FOR TKOF.

Narrative: AS WE INITIATED OUR TKOF ROLL AT VALDOSTA, GA, (RWY 35), THE F/O CALLED OUT THAT A RUDDER WARNING CAPTION WAS SHOWING. I ABORTED THE TKOF, AND UPON EXITING THE RWY, NOTED THAT THE R RUDDER BOOST SWITCH, WAS POSITIONED TO 'OFF'. EVIDENTLY, WHILE PERFORMING THE RUDDER SYS CHK PRIOR TO TKOF, I FAILED TO SWITCH THE R RUDDER BOOST BACK ON. THE NIGHT BEFORE WE WERE SCHEDULED FOR OUR OVERNIGHT IN VALDOSTA ON REDUCED REST (8 HRS). DURING THIS TIME, I ESTIMATE THAT I RECEIVED ABOUT 5:30 SLEEP. MY F/O NOTED THAT HE DID NOT RECEIVE ADEQUATE REST EITHER. WE WERE BOTH VERY FATIGUED WHEN WE DUTIED IN AT EARLY AM, AND I FOUND MYSELF OVERLOOKING ITEMS THAT I ORDINARILY AM QUITE SHARP WITH. THE DAY PRIOR, WE HAD COMPLETED A TWELVE HR DUTY DAY WITH SIX HRS FLYING, AND I FOUND MY ATTN TENDING TO WANDER. I BELIEVE THAT THE FAA REG ALLOWING SCHEDULED REDUCED REST PERIODS FOLLOWING LONG DUTY DAYS CONTRIBUTES TO PROBS OF THIS NATURE.

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.