When ambient temperatures are above what value in Celsius does the windshield delay selection issue occur after takeoff?

When ambient temperatures are above what value in Celsius does the windshield delay selection issue occur after takeoff?

• A. 25C
• B. 30C
• C. 35C
• D. 40C

Answer: (B)

Ambient temperature can change how the windshield heating/defogging system sequences after takeoff. In hot conditions, the windshield heater logic uses a delay to avoid thermal stress on the glass and to prevent unnecessary power use while the aircraft is accelerating and climbing. The CRJ-550 design notes that this delay behavior can appear when ambient temperatures exceed thirty degrees Celsius. That’s why the issue is associated with hotter conditions. Below that temperature, the system tends to follow its normal, immediate sequencing, so the delay issue isn’t expected there.

Ambient temperature can change how the windshield heating/defogging system sequences after takeoff. In hot conditions, the windshield heater logic uses a delay to avoid thermal stress on the glass and to prevent unnecessary power use while the aircraft is accelerating and climbing. The CRJ-550 design notes that this delay behavior can appear when ambient temperatures exceed thirty degrees Celsius. That’s why the issue is associated with hotter conditions. Below that temperature, the system tends to follow its normal, immediate sequencing, so the delay issue isn’t expected there.