Why is the cam checked for a 15° setting during the daily MAAS inspection?

Why is the cam checked for a 15° setting during the daily MAAS inspection?

• A. To calibrate drive ratio
• B. To adjust belt tension
• C. Because improperly set cam may not stop the aircraft in time
• D. To ensure proper fan speed

Answer: (C)

The cam is part of the mechanism that times the stop sequence. Checking it at 15° during the daily MAAS inspection ensures the stop linkage engages at the correct point in the rotation, so the aircraft will be brought to a halt within the required time. If the cam isn’t at the proper angle, the stopping action can be delayed or occur too soon, which could compromise safety. This setting isn’t about calibrating drive ratios, belt tension, or fan speed. Those aspects are controlled by other parts of the system; the cam’s role here is specifically to time the stopping action.

The cam is part of the mechanism that times the stop sequence. Checking it at 15° during the daily MAAS inspection ensures the stop linkage engages at the correct point in the rotation, so the aircraft will be brought to a halt within the required time. If the cam isn’t at the proper angle, the stopping action can be delayed or occur too soon, which could compromise safety.

This setting isn’t about calibrating drive ratios, belt tension, or fan speed. Those aspects are controlled by other parts of the system; the cam’s role here is specifically to time the stopping action.