Piper Malibu Meridian PA-46-500TP Airplane Maintenance Manual page 1123

G. Servicing
NOTE: Oxygen cylinders are identified by the ICC or DOT
identification stamped on the cylinder. The standard weight
cylinder (ICC or DOT 3AA1800) used in this airplane must
be hydrostatically tested every 5 years. The month and year
of the last test is stamped beneath the ICC/DOT
identification.
(1) Refilling Oxygen System
CAUTION: BEFORE SERVICING THE OXYGEN SYSTEM,
CAUTION: DO NOT OPERATE ELECTRICAL EQUIPMENT
CAUTION: DO
Refilling of oxygen systems should be done only by qualified
personnel. For comparison of filling pressures to ambient
temperatures refer to Chart 3. Proceed as follows:
(a) Only aviators breathing oxygen (MIL-0-27210) and
appropriate filling equipment should be used to fill the
system.
(b) If a cylinder has less than fifty (50) psi pressure or has
insufficient pressure to produce an audible hissing sound
when the valve is cracked, it should be removed and/or
purged, and if the condition has existed for a significant
length of time, hydrostatically test cylinder.
(c) Make sure both the charge valve and recharge cart fittings
are clean and free of contamination.
WARNING: BE
(d) Attach service cart hose to recharge port. Fill the system at a rate not exceeding 200 psig
per minute proceeding as follows:
1
2
6C13
PIPER AIRCRAFT, INC.
PA-46-500TP, MALIBU MERIDIAN
MAINTENANCE MANUAL
MAKE SURE THE AIRCRAFT IS SECURELY
GROUNDED ELECTRICALLY.
WHILE SERVICING OXYGEN SYSTEM.
NOT ATTEMPT TO TIGHTEN
CONNECTIONS WHILE THE SYSTEM IS
CHARGED.
CERTAIN
PETROLEUM BASED MATERIAL IS ON THE
FITTINGS OR IN THE IMMEDIATE VICINITY.
To obtain the correct filling pressure for the oxygen system at various ambient
temperatures, a table is included for your convenience. The pressures given are not
exact, but sufficiently accurate for practical purposes of working pressures between
1800 and 2400 psig cylinders. The cylinder should be allowed to cool to a stabilized
temperature after filling before checking against the values in Chart 2.
When using a recharge unit consisting of one supply cylinder, slowly open the valve
of the supply unit and allow the oxygen to transfer.
ANY
NO OIL OR OTHER
CHART 3
FILLING PRESSURE VS.
AMBIENT TEMPERATURE
Ambient Filling
Temperature Pressure
°F / °C
0 / -17.78 1650
10 / -12.22 1700
20 / -6.67 1725
30 / -1.11 1775
40 / 4.44 1825
50 / 10 1875
60 / 15.56 1925
70 / 21 1975
80 / 27 2000
90 / 32 2050
100 / 38 2100
110 / 43 2150
120 / 49 2200
130 / 54 2250
NOTE
Filling pressures are for
1850 PSI at
(21.11°C). Chart assumes
25°F (11.8°C) rise due to
heat of compressor with
max. fill rate.
35-10-00
Apr 15/07
(PSI)
70°F
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