What restrictions apply when using the DAAP relief for preflight planning?

When utilizing the DAAP (Departure Airport Analysis Program) relief for preflight planning, it is essential that all specified safety systems are operational to ensure a safe flight operation. Each of the three systems mentioned—lift dump devices, thrust reversers, and anti-skid systems—plays a critical role in the aircraft's ability to perform safely during takeoff and landing, particularly under specific weather and runway conditions.

Lift dump devices help the aircraft to decelerate quickly after landing, especially on shorter runways or when conditions are wet or slippery. If these systems are inoperative, there's an increased risk during landing phases, potentially impacting the aircraft's stopping capability.

Thrust reversers assist with slowing down the aircraft upon landing as well, and their failure could similarly result in extended landing distances. This is particularly important during heavy or fast landings, where every foot of stopping distance matters.

Anti-skid systems prevent wheel lockup during braking, allowing for better control and effectiveness in deceleration. Without a functioning anti-skid system, the risk of tire damage and loss of control during braking is heightened, especially on slippery surfaces.

Thus, the necessity of having all these systems operational is not just regulatory; it's fundamentally tied to flight safety and operational integrity, making