POSSIBLE TKOF WITH NO FLAPS.

Narrative

AFTER STARTING THE L ENG THE CAPT STATED THAT WE WOULD DO A SINGLE ENG TAXI OUT TO THE RWY; WE THEN COMPLETED THE AFTER START CHKLIST. AFTER WE STARTED TO TAXI IT WAS APPARENT THAT IT WOULD BE A SHORT TAXI OUT TO THE RWY AND THE CAPT ASKED ME TO START THE R ENG. WE COMPLETED THE DELAYED ENG START CHKLIST AND I STARTED THE R ENG. AFTER THE R ENG WAS STARTED WE COMPLETED THE AFTER START CHKLIST AND THE BEFORE TKOF CHKLIST. AT SOME POINT WHILE READING THE BEFORE START CHKLIST THE TWR CTLR CLRED US FOR TKOF; HE DID THIS OVER THE GND CTL FREQ. I SWITCHED OVER TO THE TWR CTL FREQ AND WE FINISHED THE CHKLIST. AFTER DEP AT 1000 FT AGL THE CAPT CALLED FOR THE FLAPS UP AND THE SLATS RETRACT. AT THIS POINT MY ATTN WAS DIVERTED. MY HAND WAS ON THE FLAP/SLAT CTL HANDLE AND I RETRACTED THE SLATS. AT THIS TIME THE CAPT APOLOGIZED FOR RUSHING THE DEP. WHILE DOING THE AFTER TKOF CHKLIST I GOT THIS FEELING THAT I DID NOT PUT THE FLAPS UP AND WONDERED IF WE TOOK OFF WITH THE FLAPS IN THE ZERO DEG CONFIGN. I NORMALLY PUT THE FLAPS DOWN AND EXTEND THE SLATS TO THE TKOF CONFIGN BEFORE WE START THE TAXI OUT. THEY ARE EXTENDED AS PART OF A FLOW PATTERN I USE. IF A SINGLE ENG TAXI PROC IS USED I THEN RECHK THE FLAPS AND SLATS USING A FLOW PATTERN. THE FLAPS AND SLATS ARE THEN RECHKED AGAIN BY BOTH THE FO AND CAPT WHILE DOING THE BEFORE TKOF CHKLIST. HERE IS WHAT I THINK MAY HAVE HAPPENED: 1) I MAY HAVE PUT THE FLAPS UP AT 1000 FT WHILE MY ATTN WAS DIVERTED WITHOUT CONSCIOUSLY THINKING ABOUT WHAT I WAS DOING. 2) THE CAPT MAY HAVE PUT THE FLAPS UP AT 1000 FT; WHICH THEY OCCASIONALLY DO. I THEN RETRACTED THE SLATS. 3) WE DEPARTED WITH THE FLAPS IN THE ZERO DEG CONFIGN; THEY ARE SUPPOSED TO BE SET TO EITHER 5 OR 15 DEGS. HERE IS WHAT I THINK MAY HAVE CONTRIBUTED: 1) CREW FATIGUE. WE HAD A SCHEDULED XX27 LAYOVER WHICH WAS REDUCED BECAUSE OF OUR LATE ARR THE NIGHT BEFORE. 2) INADEQUATE REST. THE HOTEL IS LOCATED AT THE DEP END OF A RWY. I WAS AWAKENED EARLY BY THE CARGO HUB DEP. 3) SHORT TAXI TO THE RWY WHICH CAUSED US TO RUSH. I CANNOT SAY IF THE FLAPS WERE UP OR DOWN FOR TKOF. I DO KNOW THAT THE SLATS WERE EXTENDED FOR TKOF.