Pressure surges and vibration can cause wear on the hoses.

The AC electrical power distribution on board is carried out in several steps: from the different sources towards the main AC busbars; then, from the main AC busbars, either directly towards important consumers (pumps, galleys...), or towards the associat

AC GENERATION includes items such as inverters, AC generators, control and regulating components, indicating systems, etc., all wiring to but not including main buses, as applicable.

Electrical Power system is about units and components which generate, control and supply AC and/or DC electrical power for other systems, including generators and relays, inverters, batteries, etc.

Audio Integrating controls the output of communications and navigation receivers into the flight crew headphones and speakers, and the output of the flight crew microphones into the communications transmitters.

Speech communication utilizes voice modulated electro-magnetic waves to transmit and/or receive messages from air-to-air or air-to-ground installations.

Environment control system is composed of those units and components which furnish a means of pressurizing, heating, cooling, moisture controlling, filtering and treating the air used to ventilate the areas of the fuselage within the pressure seals.

"Unscheduled Servicing" includes instructions such as those for ice and snow removal from parked aircraft, preoiling of radial engines after extended shutdown, etc.

"Scheduled Servicing" includes internal cleaning, etc. Shall not include lubrication procedures required for the accomplishment of maintenance practices.

The procedure that follows contains information as specified in the IATA Guidance Material on Standard Into-Plane Fueling Procedures.

The section 12-10 of AMM describes replenishing. It provides instructions necessary for the replenishment of fuel , oil , hydraulic fluid , water, other fluids , tire pressure, etc…