SUPPLEMENT 37
”EROS/INTERTECHNIQUE”
GASEOUS OXYGEN
SYSTEM
(31000 FT)
TBM
700
Page 9.37.9
Edition 1 -- November 30, 2010
Rev. 0
SECTION 7
DESCRIPTION
The TBM 700 airplane is equipped with an optional gaseous oxygen system,
which will be used by the crew and the passengers, when the cabin altitude is
greater than 10000 ft following a loss of pressurization or in case of cabin air
contamination.
The oxygen reserve is contained in an oxygen cylinder made of composite
material and located outside of the pressurized cabin into the R.H. karman.
Its capacity is 50.3 cu.ft (1425 litres) “STPD” (Standard Temperature
Pressure Dry) and use limit pressures are :
-- maximum pressure 1850 PSIG (127 bars) at 70
˚
F (21
˚
C).
Evolution of this pressure according to the outside temperature is given in
Section 8, Figure 9.37.3, as well as on a placard on the inside of the
cylinder service door,
-- minimum pressure 217 PSIG (15 bars).
The oxygen cylinder head is equipped with :
-- a hand--controlled isolation valve to permit cylinder installation and
removal,
-- a microswitch supplying the ”OXYGEN” CAS message located on the
MFD unit. This CAS message lights on, when the isolation valve is closed,
-- a graduated pressure gage,
-- a charging valve -- refer to the replenishment procedure in Section 8,
-- an overpressure system consisting of a safety disc. This disc is designed
to rupture between 2500 and 2775 PSIG (172 and 191 bars) discharging
the cylinder contents outboard,
-- a pressure reducing valve adjusting utilization pressure to a value
comprised between 64 and 85 PSIG (4.4 and 5.9 bars),
-- a low pressure safety valve calibrated to 116 PSIG (8 bars).
