The drain and vent system consists of lines collecting and carrying waste fluids and vapor overboard from the engine and nacelle accessories. Drains are provided to carry fluids from any point where lines and accessories may leak and where fluids may accumulate in a cavity. Fluid from forward and aft sumps, oil-fuel heat exchanger, VBV, and VSV are discharged overboard through drains. In addition, some drain lines serve as vents to carry air and vapor from the engine and accessory cavities.

Carry out permanent repair by filling damaged area with potting compound BMS-287 with reference to SRM.

When you apply hydraulic pressure, make sure that the lever does not touch the stop (1).

Different wordings are used for tightening the bolts.

The manufacturer recommends that you prepare the mixture in an area with good airflow.

For some words, there are notes that tell you to use other approved alternatives or a different construction.

The forward and aft cargo electronic units are identical.

The air goes through riser ducts and up side walls to an overhead distribution duct.

The flight compartment gets conditioned air from the left pack and the mix manifold.

A flight starts when the air mode is sensed for longer than 30 seconds.

The armed position is the usual position of the switch.