Where can the normal oil level ranges be found?

The normal oil level ranges can be found in the Quick Reference Handbook (QRH) 0-24. This is because the QRH is specifically designed to provide quick access to critical information and procedures for pilots during flight operations. Among the various sections of the QRH, it includes essential data such as fluid levels, performance parameters, and emergency procedures that pilots need to reference quickly.

The other choices, while they may contain useful information, do not typically provide the immediate and concise data on oil levels like the QRH does. Aircraft maintenance logs focus primarily on historical maintenance records and may not specify current oil level ranges, the flight operations manual might govern standard operating procedures rather than specific oil specifications, and the engine specifications sheet would generally contain technical data about the engine but not specific operational procedures or fluid level guidance relevant for pilots during flight.