Before initiating practice single engine maneuvers using the TRNG switch, verify that the bleed air HEAT switch is secured.

Before initiating practice single engine maneuvers using the TRNG switch, verify that the bleed air HEAT switch is secured.

• A. Secured
• B. On
• C. Off
• D. Disabled

Answer: (A)

Before initiating practice single-engine maneuvers with the TRNG switch, you want the bleed air heat system in a safe, non-operating state. Secured means the bleed air HEAT switch is locked in its safe position so no bleed air heat is commanded during the maneuver. This prevents unintended heating of the bleed air system, which could affect engine temperatures or performance during training. If the heat switch were left On, heat would be applied; if it were Off but not secured, it could still be moved accidentally. Disabled isn’t the normal flight state for routine practice maneuvers. Keeping the switch secured ensures a stable, non-energized condition for the TRNG operation.

Before initiating practice single-engine maneuvers with the TRNG switch, you want the bleed air heat system in a safe, non-operating state. Secured means the bleed air HEAT switch is locked in its safe position so no bleed air heat is commanded during the maneuver. This prevents unintended heating of the bleed air system, which could affect engine temperatures or performance during training. If the heat switch were left On, heat would be applied; if it were Off but not secured, it could still be moved accidentally. Disabled isn’t the normal flight state for routine practice maneuvers. Keeping the switch secured ensures a stable, non-energized condition for the TRNG operation.