SECTION 7
DESCRIPTION
T B M
850
PILOT’S OPERATING HANDBOOK
Page 7.9.3
Edition 1 -- June 22, 2007
Rev. 14
System protection
Power for the engine bleed air system is supplied by the BUS 2 bar and is
protected by the CAB BLEED breaker.
CABIN PRESSURIZATION CONTROL SYSTEM
In flight, the GASC controls the modulation of the Outflow Valve (OFV) in
order to reach the computed cabin altitude.
System operation
See Figure 7.9.3.
The BLEED switch allows to activate the pressurization system.
The expected flight altitude (A/C ALT) is selected by the pilot through the
Cabin Pressurization Control Panel (CPCP) which computes the cabin
altitude to be managed by the GASC. The set cabin altitude is reported in the
information display on the MFD as ALT SEL FT.
The GASC controls the OFV through a torque motor on the valve.
Cabin altitude management
In order to maximize comfort during all phases of flight, the cabin altitude is
automatically computed by the GASC using flight parameters (such as
aircraft altitude, altitude rate of change) sent by the avionics.
The cabin altitude rates of change during climb or descent phases are set by
default to +/-- 525 ft/min at sea level.
System monitoring
The pilot monitors information related to the pressurization system through
gauges and information displayed on the MFD :
-- computed cabin altitude in ft,
-- cabin altitude in ft,
-- cabin climb speed in ft/min,
-- cabin differential pressure (
Δ
P) in PSI.
These gauges are independent of the GASC controls and internal sensors.
PIM - DO NOT USE FOR FLIGHT OPERATIONS
Summary of Contents for TBM 850
Page 1: ...PILOT S INFORMATION MANUAL TBM 850 Edition 1 PIM DO NOT USE FOR FLIGHT OPERATIONS ...
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