Air carrier flight crew and Dispatcher reported during preflight that the flight release was missing the 'overburn fuel' requirement due to Dry Ice on board. It was determined that the missing fuel was negligible and flight departed.
Synopsis
Air carrier flight crew and Dispatcher reported during preflight that the flight release was missing the 'overburn fuel' requirement due to Dry Ice on board. It was determined that the missing fuel was negligible and flight departed.
Narrative
Just prior to pushback; we received the final weight and balance. I noticed the reference to dry ice in the aft belly and the need for cooling in that compartment. We complied with the dry ice procedures. I missed the fact that a fuel over burn was not included on our flight plan release due to the dry ice procedure. While taxiing out; our Dispatcher notified us that he had just learned of the inclusion of dry ice and asked us if we wanted new fuel numbers to include the overburn of fuel. I responded that we were OK continuing since it was a XX minute flight and we had plenty of gas planned upon reaching our destination and the overburn would be negligible. The Dispatcher concurred and we continued. Our assumption was that he'd run the numbers and we were good to go. In hindsight; we should have gotten new fuel burn numbers.Cause: Late notification of additional dry ice at pushback and dealing with the follow up during taxi for takeoff.Suggestions: Make sure to contact Dispatch with any changes to our flight.
Second reporter narrative
Upon receiving our weight and balance form for the flight; the Captain noted the requirements based on the amount (weight) of dry ice onboard; which were performed in accordance with company operations manual. This was not accounted for in the initial flight plan release; which we did not note. Upon taxi out; our Dispatcher learned of the dry ice on board; which requires action by him and he queried us about issuing new fuel burn numbers due to additional air conditioning. While this is normally a considered factor for standard long haul flying; this happened to be a flight of well under one hour; and the Captain and I agreed that new fuel numbers were not required due to the negligible nature of the difference in burn. While that was a correct assessment by the crew and Dispatcher in this case; it was frankly an abnormal (short) flight profile for our equipment and that is not always the case. Cause: Late notification to the crew and no notification to Dispatch of dry ice procedure requirements being met.Suggestions: Timely information passed to Dispatch prior to block out of any changes to cargo affecting the fuel calculations of the leg.
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Source: NASA Aviation Safety Reporting System (public domain). Reports are voluntary submissions and are not verified by NASA.