Operations Dispatch Practice Exam

ETOPS critical fuel planning is about ensuring you have enough fuel to handle the most demanding contingencies when you are far from a diversion point. The key scenarios considered are the immediate need to descend if cabin pressurization is lost, the ability to proceed to a suitable alternate airport, and the requirement to hold at a safe altitude (typically around 10,000 feet) for the remainder of the flight while the situation is resolved. This combination—fuel to descend to a safe altitude after a pressurization loss, fuel to reach an alternate, and fuel to maintain 10,000 feet for the rest of the trip—provides a dependable buffer for an unforeseen abnormal event and a diversion, without counting on power sources like the APU or RAT that may not be available in all ETOPS scenarios. The other options introduce elements that aren’t part of the standard critical-fuel calculation, so they don’t fit the concept as defined for ETOPS critical fuel planning.