Mooney M20TN, Service And Maintenance Manual

Page: 358 / 1169

MOONEY AVIATION COMPANY, INC.
M20TN SERVICE & MAINTENANCE MANUAL
Date
2006
Rev Date
Page 12
TAILCONE ASSY
BAGGAGE
WALL
BOTTLE
ASSY
BAND
CLAMP
NUT
MOUNTING
HARDWARE
GROUND STRAP
AND HARDWARE
LOOKING AFT FROM STA 120
PRECISE FLIGHT OXYGEN SYSTEM - OXYGEN BOTTLE INSTALLATION
FIGURE 35--9
Oxygen System Bleed--Down (Purging)
Use the following procedure to bleed--down the oxygen
system should any of the hard lines, nonconductive line
be opened, or bottle removed and re--installed/re-
placed. This procedure is required to prevent contami-
nation, or moisture inside the system.
1. Attach the filler line to the filler port, making sure to
purge the line prior to attaching to the aircraft.
2. With the System ON, and flowmeters (or open
Connectors) installed in the distribution ports, initiate
flow for 1--2min.
3. Removed the flowmeters from the distribution port,
and turn the oxygen System OFF, and fill to 650psig.
4. Perform leak checks as required.
5. Turn the System ON and using flowmeters (or
open connectors) installed in the distribution ports;
bleed the system down to below 50psig (but above
0psig).
6. Repeat steps 3--5 once. (Leak check not required
on second purge)
7. Removed the flowmeters from the distribution port,
and turn the oxygen System OFF, and fill to 1500psig.
8. Perform Final leak check.
9. Fill System to 1800--2000psig as required.
Pulse Oximeter (FlightStat) -- (Optional)
The Non in Medical “FlightStat” Pulse Oximeter (Fig-
ure 35--7) emits red and infrared light through the fin-
ger and detects the fluctuating signals caused by the
pulsating blood flow. Pulse rate is determined from
the signals received by a light detector. The ratio of
the fluctuation between red and infrared light signals
is used to calculate the relative blood oxygen satura-
tion (%SpO2) of hemoglobin. A pulse oximeter indi-
cates what percent of hemoglobin molecules are
carrying oxygen; blood oxygen saturation or
%SpO2. A %SpO2 reading of 97 indicates that a rel-
ative 97% of your hemoglobin molecules are carry-
ing oxygen.
At higher altitudes, %SpO2 decreases due to less
oxygen available because of the decrease in air
pressure. Physical exertion at high altitude may be
difficult because of the reduced oxygen level.
35--00--05
AUGUST 2010