Mooney M20TN, Service And Maintenance Manual

Page: 351 / 1169

MOONEY AVIATION COMPANY, INC.
M20TN SERVICE & MAINTENANCE MANUAL
Date
2006
Rev Date
Page 5
35--00--00 -- GENERAL
AVOX/SCOTT OXYGEN SYSTEM (OPTIONAL)
The oxygen system is required for the M20TN. The sys-
tem consists of a 77.1 or (Optional) 115.7 cubic ft. cylin-
der located in the tailcone immediately aft of the bag-
gage compartment bulkhead. A reducing valve and
altitude compensating valve are connected to cylinder
to regulate oxygen flow for a given altitude. Lines con-
nected to altitude compensating valve distribute avia-
tors oxygen to pilot and passengers. The system is acti-
vated by the control knob located on the pilot’s side
panel and is rotated to open reducing valve. A gauge,
located on pilot’s arm rest adjacent to control knob, indi-
cates pressure of cylinder. When cylinder is full, pres-
sure will indicate 1850 P.S.I. at 21
°
C. (70
°
F.). The sys-
tem is serviced through an access opening located aft
of baggage compartment door. Standard refill fittings
are required to fill cylinder with aviators oxygen. (Spec.
No. MIL--O--27210).
-- WARNING --
Proper safety measures must be employed while
oxygen system maintenance is being performed
or a serious fire hazard will be created. Avoid
making sparks and keep all burning cigarettes or
fire away from vicinity of oxygen. Make sure that
your hands, tools, and clothing are clean, partic-
ularly with respect to oil or grease, for these will
IGNITE upon contact with pure oxygen under
pressure.
PRECISE FLIGHT OXYGEN SYSTEM (OPTIONAL)
The Precise Flight, Inc. Fixed Oxygen System (“Oxy-
gen System” or “System”), is installed to provide sup-
plemental oxygen for the pilot and passengers. The
System consists of the following:
1. A 77 cu. ft. (or Optional 115.7 cu. ft.) composite
wrapped cylinder mounted in the aft fuselage tail cone
of the aircraft on the right hand side.
2. An oxygen regulator which is connected to the
bottle and contains:
a. An overpressure discharge
b. A high pressure transducer
3. A Remote Filler Assembly located on the right
hand side of the aircraft, just aft of the baggage door
contains:
a. A service port for filling the Oxygen System, the
system uses a Puritan--Bennett valve.
4. Associated plumbing and fittings
5. A center console panel display and System actua-
tion switch
6. An overhead distribution manifold with low pres-
sure transducer and integrated interior LED dome light
located just aft of the pilots seats and in--front of the
passenger seats in the overhead
7. Breathing devices and flowmeters with cannulas,
or masks Setting the oxygen switch to ON illuminates
the display showing oxygen quantity and energizes the
System to allow oxygen to reach the overhead distribu-
tion manifold. Additionally the System annunciates if
oxygen should be used in the aircraft as well as oxygen
pressure or electrical faults. Four (4) manually oper-
ated oxygen flowmeters can be connected to the oxy-
gen distribution manifold. The flow controls are cali-
brated and adjustable for altitude by the user. The
following flow controls can be one of the following:
S
A4 Flowmeters and Standard or Oxygen Conserving
Cannulas -- Up to 18,000 Ft
S
A4 Flowmeters and Masks (Standard and Micro-
phone) -- Up to 25,000 Ft
S
A5 Flowmeters and Standard or Oxygen Conserving
Cannulas -- Up to 18,000ft
S
A5 Flowmeters and Masks (Standard and Micro-
phone) -- Up to 25,000 Ft
S
PreciseFlow
®
Oxygen Conserver with Dual Lumen
Cannula -- Up to 18,000ft
S
PreciseFlow
®
Oxygen Conserver with Masks (Stan-
dard and Microphone) -- Up to 25,000ft
35--00--01 -- AVOX/SCOTT RECHARGING PROCE-
DURES
-- WARNING --
Oil, grease or other lubricants in contact with
oxygen create a serious fire hazard, and such
contact must be avoided when handling oxygen
equipment.
-- WARNING --
NO SMOKING when refilling oxygen cylinder.
1. The oxygen cylinder should not be used to less
than 100 P.S.I.; contamination may occur to cylinder
and valve. The valve must be removed and cylinder
cleaned and inspected if this happens.
2. Refill cylinder with aviators oxygen Specification
No. MIL--O--27210, through Oxygen Servicing Access
Door (1) (Figure 35--1). Special fittings are required for
this servicing. A compatible fitting for the AVOX Sys-
tems/Scott Aviation Recharging Valve (2) must be
used. Mooney P/N 870025--501 oxygen recharge hose
assembly is recommended.
3. The cylinder contains 1850 P.S.I. at 21
°
C. (70
°
F.)
when fully charged. Temperature has an affect on the
correct charging pressure; See Section 12--10--04 and
(Figure 12--1) for pressure vs. temperature charging
pressure.
35--00--00
AUGUST 2010