In the event a page must be added after the initial printing, use the number of the preceding page with a letter suffix added for the added page(s) (e.g., Page 1-6A, 1-6B,etc.).

Explain how to recognize impending problems and what to do if malfunctions occur.

The effect of weight should also be scheduled if it significantly affect cruise performance.

Each page shall bear a page number and date of issue or revision at the bottom.

To adjust the volume, use the buttons on the side of the phone.

When you install the antenna, the alignment arrow must point forward.

The equipment cooling system has low flow detectors to give a warning when there is not sufficient cooling airflow. On the ground, the crew call horn sounds when low flow is detected in the supply system.

The fans are single-stage fans with an integral induction motor. They each have a check valve and install as a unit.

The supply and exhaust fans install with V-band clamps. Arrows show the correct direction of flow. The supply and exhaust fans are interchangeable.

The recirculation system uses a fan to move air from the passenger compartment to the main distribution manifold. This system reduces the amount of air necessary for the packs to supply.

Gas pressure in the sense tube holds the fault pressure switch in the closed position. The other two pressure switches close when the gas pressure increases because of an overheat or fire condition.