What is the minimum temperature in flight listed for the aircraft?

What is the minimum temperature in flight listed for the aircraft?

• A. -70 C
• B. -65 C
• C. -75 C
• D. -80 C

Answer: (A)

Outside air temperature has a published lower limit for in-flight operation, indicating the lowest ambient temperature at which the aircraft’s performance data and systems are valid. For this CRJ-550, that in-flight minimum is -70 C, so you should not rely on standard performance data if the OAT drops below that value. The other numbers aren’t the aircraft’s published in-flight minimum, so they don’t apply here.

Outside air temperature has a published lower limit for in-flight operation, indicating the lowest ambient temperature at which the aircraft’s performance data and systems are valid. For this CRJ-550, that in-flight minimum is -70 C, so you should not rely on standard performance data if the OAT drops below that value. The other numbers aren’t the aircraft’s published in-flight minimum, so they don’t apply here.