The ambient temperature range for landings spans from:

The ambient temperature range for landings spans from:

• A. -50 °C to ISA +25 °C
• B. -60 °C to ISA +40 °C
• C. -40 °C to ISA +35 °C
• D. -20 °C to ISA +30 °C

Answer: (C)

Ambient temperature limits define the certified operating envelope for landing and takeoff. For the Beechjet 400A, the approved range is from -40°C up to ISA plus 35°C. This means you can operate safely during landing and takeoff anywhere within that spread because the aircraft’s systems, materials, and performance have been tested and verified to function properly there. The lower bound of -40°C protects against issues like fuel and lubrication viscosity changes, brittle materials, and battery/avionics performance at extreme cold. The upper bound of ISA+35°C ensures the environmental control system, engines, and other systems aren’t pushed beyond tested conditions in hot ambient air, where heat management and performance margins could be challenged. Other ranges fall outside the certified envelope, which is why they’re not correct.

Ambient temperature limits define the certified operating envelope for landing and takeoff. For the Beechjet 400A, the approved range is from -40°C up to ISA plus 35°C. This means you can operate safely during landing and takeoff anywhere within that spread because the aircraft’s systems, materials, and performance have been tested and verified to function properly there. The lower bound of -40°C protects against issues like fuel and lubrication viscosity changes, brittle materials, and battery/avionics performance at extreme cold. The upper bound of ISA+35°C ensures the environmental control system, engines, and other systems aren’t pushed beyond tested conditions in hot ambient air, where heat management and performance margins could be challenged. Other ranges fall outside the certified envelope, which is why they’re not correct.