Specifications

SECTION II
MODEL 560 AIRPLANE AND SYSTEMS
VAPOR CYCLE AIR CONDITIONING
A standard vapor cycle air conditioner using R134A refrigerant is available. It discharges conditioned
air from floor mounted evaporator/blowers in the forward and aft ends of the dropped isle, to provide rapid
cabin cooling. The air conditioner is controlled by a switch panel on the copilot’s instrument panel, and can
be used on the ground or in flight up to 18,000 feet. The MODE, AC/FAN/OFF switch controls primary
power to the system. The AC position turns on the compressor and the forward blower. The FWD FAN
HI/LO switch controls the forward blower speed when the MODE switch is in AC or FAN. A COMP ON
twist-dimmable light illuminates when the compressor is powered. The system may not be operated in the
AC mode above 18,000 feet. A ground unit, or at least one generator, must be on line to run the
compressor.
OXYGEN
GENERAL
The oxygen system provides supplementary oxygen for the cockpit sweep-on type masks and the
passengers' continuous flow masks. It is not normally used since a cabin altitude of 8000 feet can be
maintained at the maximum certified airplane altitude with normal pressurization system operation.
OXYGEN BOTTLE
In the unlikely event supplementary oxygen is required, a fully charged 64.0 cubic foot bottle, located
in the left side of the tailcone compartment, beneath the floor, provides approximately one hour of oxygen
for crew and six passengers. Duration for actual personnel aboard can be computed by assuming
consumption at a rate of 4.3 liters per minute per occupant, and a usable full bottle output of 1812 liters.
Normal pressure for the system is 1600 to 1800 PSI.
The bottle assembly contains a pressure reducing valve, shutoff valve and provisions for external
servicing. A green disc is installed in the end of the bottle overpressure vent line which is flush mounted on
the lower left side of the aft empennage. This disc, when ruptured, indicates bottle pressure has exceeded
2500 PSI and is empty. This overpressure system will actuate under only the most adverse circumstances;
therefore, if the disc is ruptured, determine the cause of the overpressure before flight. The oxygen bottle
pressure is displayed on the right instrument panel. A locking connector has been provided on the right
and left flight deck consoles to supply the flight compartment occupants with 70 PSI oxygen for diluter
demand mask use. The diluter demand masks have an integrally mounted microphone and oxygen
regulator. Each oxygen regulator has a lever allowing manual selection of diluter demand (normal) or
demand (100% oxygen) flows. The lever is normally placed in the 100% position so it is ready for
emergency use at high altitudes. If oxygen is used below 20,000 feet, the lever can be repositioned to
normal to conserve oxygen.
OXYGEN CONTROL PANEL
The left console contains the oxygen controls regulating flow to the passenger compartment. An
oxygen control valve labeled CREW ONLY, NORMAL and MANUAL DROP allows the pilot to select oxygen
flow to the flight deck only (CREW ONLY position), or flow to both the passenger compartment and flight
deck (NORMAL position). The MANUAL DROP position will allow the passenger oxygen masks to be
manually deployed in the event of an emergency and the masks fail to automatically deploy. A switch on
both the pilot's and copilot's control panels, labeled MIC OXY MASK/MIC HEADSET, selects which
microphone will be used. Refer to Figure 2-28 for the pilot’s side console.
I 56OMB-01 Configuration AA 2-57