What procedure is required before the first flight of a day if the airplane has been cold-soaked at -30C or colder for more than 8 hours?

What procedure is required before the first flight of a day if the airplane has been cold-soaked at -30C or colder for more than 8 hours?

• A. The engines must be motored for 60 seconds and the fan rotation must be verified before an engine start is initiated.
• B. The engines must be motored for 30 seconds.
• C. Only the hydraulic system needs to be checked.
• D. No special procedure is required.

Answer: (A)

Cold soaking at very low temperatures can thicken lubricants and allow ice or stiffness to develop in engine components. Before the first flight after such a condition, motors are run on the engines for a full 60 seconds to circulate oil, pressurize systems, and reveal any unusual resistance. After this motoring, the fan should rotate freely, confirming there’s no binding or obstruction before fuel is introduced and the engine start is attempted. This pre-start check helps catch issues like a stuck rotor or seized bearings and reduces the risk of a failed or damaging start. Shorter motoring or checking only the hydraulic system wouldn’t provide the same protection, and skipping a special procedure isn’t appropriate after extended cold exposure.

Cold soaking at very low temperatures can thicken lubricants and allow ice or stiffness to develop in engine components. Before the first flight after such a condition, motors are run on the engines for a full 60 seconds to circulate oil, pressurize systems, and reveal any unusual resistance. After this motoring, the fan should rotate freely, confirming there’s no binding or obstruction before fuel is introduced and the engine start is attempted. This pre-start check helps catch issues like a stuck rotor or seized bearings and reduces the risk of a failed or damaging start. Shorter motoring or checking only the hydraulic system wouldn’t provide the same protection, and skipping a special procedure isn’t appropriate after extended cold exposure.