User manual

90 91
90 91
altitude instrument (2), indicates the differential pressure between the
cabin and the outside atmosphere.
Note:
A residual pressure of approximately .25 PSI will show on the differential
pressure gauge at any time pressurization is selected and the aircraft is
operating lower than the cabin altitude selected.
Do not land when aircraft is pressurized above .3 PSI
A warning light on the annunciator display warns the pilot should the
cabin altitude go above 10.500 feet (Garret: 11.500 feet to 12.000
feet) or should the cabin differential pressure go above 5.7 psi. Cabin
pressure is automatically regulated to a maximum of 5.5 psi. Should
the automatic regulator malfunction, a system of safety devices
releases pressure.