B727-200 REJECTED TKOF AT COS; CO; FOR AUTOPACK TRIP SYS ARMED LIGHT NOT ILLUMINATED.

Narrative

TKOF WAS REJECTED DUE TO LACK OF AN AUTOPACK TRIP LIGHT. AS WE APCHED THE RWY WE COMPLETED THE DELAYED START CHKLIST AND BEFORE TKOF CHKLIST. AS WE BEGAN THE TKOF ROLL; I NOTICED THE AUTOPACK TRIP LIGHT DID NOT ILLUMINATE. MY PERCEPTION WAS THAT THE BULB WAS STILL DIMMED FOR NIGHT OPS. MY ATTN WAS CONCENTRATED ON TRYING TO BRIGHTEN THE BULB. AFTER 1-2 SECONDS; I REALIZED THE LIGHT WAS REALLY NOT ON AND ANNOUNCED 'NO GREEN LIGHT.' THE TKOF WAS REJECTED AND I IMMEDIATELY REALIZED THE SWITCH WAS LEFT IN THE CUTOUT POS. THE CHKLISTS WERE ACCOMPLISHED; A LOGBOOK ENTRY WAS MADE; BOOK COOLING PERIOD WAS OBSERVED AND WE NOTIFIED THE COMPANY. CONTRIBUTING FACTORS MAY HAVE INCLUDED THE MORNING DEP WITH MILD FATIGUE. THE BEFORE TKOF CHKLIST IS NORMALLY A VERY BUSY TIME; BUT I DID NOT FEEL MORE RUSHED THAN USUAL. I FEEL THAT SOMETHING MAY HAVE DISTR ME AT THE POINT IN THE CHKLIST WHEN I SHOULD HAVE POSITIONED THE AUTOPACK TRIP SWITCH TO NORMAL. BUT I DON'T RECALL A SPECIFIC ITEM. AFTER A YR IN THE SAME CREW POS; THE CHKLISTS ARE BECOMING ROUTINE. FOR THIS REASON; I FEEL IT IS MORE IMPORTANT THAN EVER TO BE VERY DELIBERATE WITH THE CHKLIST.