SECTION 7
DESCRIPTION
TBM
700
PILOT’S OPERATING HANDBOOK
Page 7.9.5
Edition 1 -- November 30, 2010
Rev. 0
PRESSURIZATION
(Figures 7.9.2 and 7.9.3)
Pressurization system maintains the pressure corresponding to an altitude
compatible with passengers’ safety and comfort inside the cabin.
The system uses the air conditioning system to pressurize the cabin and the
vacuum generation system for check and safety. Pressure controller, located
on ”ECS” panel allows pilot selecting :
-- a cabin altitude between sea level and 8900 ft,
-- the cabin climb speed.
Cabin altitude is maintained by an outflow valve and a safety valve limits
differential pressure between cabin and atmosphere at 6.2 psi (427 mb).
These valves are attached to rear pressure bulkhead and each one is
connected to a static port located on rear cone for the outflow valve and under
rear baggage compartment for safety valve.
Cabin is automatically depressurized as soon as the airplane is on ground
through landing gear switch (airplane on ground) or, if necessary, by
actuating ”DUMP” switch located on ”ECS” panel (in normal operation, this
switch is protected and locked by a cover).
Indicating
The “CABIN ALTITUDE” warning message appears in the GDU 1500 MFD
“CAS” window (in display normal conditions) when the cabin altitude is over
10000 ft or when the cabin--atmosphere differential pressure is higher than
6.2 psi (427 mb).
The “CABIN DIFF PRESS” warning message appears in the GDU 1500 MFD
“CAS” window (in display normal conditions) when the cabin--atmosphere
differential pressure is over 6.2 psi (427 mb).
NOTE :
”CABIN DIFF PRESS” CAS message displayed has no effect on system
functioning -- Refer to Section 3 ”Emergency procedures”.