DC-10 30
Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Confusion; Distraction
Deviation / Discrepancy - Procedural Published Material / Policy; Ground Event / Encounter Other / Unknown
Flight Crew Rejected Takeoff
Human Factors
We had been watching our fuel since we had the APU running for almost 2 hours due to extreme heat and a slow load team. As we took the runway I thought we had gone below required fuel on the release. We had been cleared for takeoff; I asked to cancel takeoff clearance to clear the runway and confirm fuels with [Operations]. We accomplished that and after I called [Operations] I realized I had been using takeoff fuel not required fuel. We in fact had plenty of fuel to depart. We reentered the line for the runway and departed uneventfully.As a crew we had just focused in on the wrong number on the release. I was coming off of a month of vacation so I wasn't as sharp as I needed to be on this day. Also the long wait followed by all the activity happening at once for departure did not help. I need to be a little more vigilant to what I am looking at on the release regardless of what is going on. I am glad we took the time to confirm things with [Operations]. It resulted in a little embarrassment for me but in the end we took a conservative route; we consulted with [Operations] and the cargo moved safely.
MD-10 flight crew reported misinterpreting fuel quantity on release.