THE NEW PIPER AIRCRAFT, INC.
PA-32-301FT / 301XTC
MAINTENANCE MANUAL
PAGE 14
Jun 1/03
3J4
35-10-00
4. Oxygen System Components
Keeping in mind the effect of compressed oxygen on materials, oxygen system components must be
handled carefully. Ports on regulators, indicators, and other opened components must also be kept
capped or plugged to prevent ingestion of foreign material. Adjustments or modifications should only be
initiated under the auspices of the FAA, Piper, or Scott Aviation.
NOTE: Replacement time for the recharge valve is on condition, but recommended each 5 years. The
regulator requires overhaul every six (6) years. The lightweight composite cylinder must be
removed every three (3) years for hydrostatic testing.
A. Oxygen Cylinder (Refer to Figure 6.)
(1) Removal
CAUTION
: BEFORE ENTERING THE TAIL CONE, FIRST SUPPORT THE AIRCRAFT TAIL
WITH A SUITABLE TAILSTAND.
From inside the aft cabin:
(a) Remove screws attaching finished bulkhead to fuselage bulkhead.
(b) Remove finished bulkhead.
(c) With immediate area clear of flammables (grease, hydraulic fluid, fuel, etc.) and oxygen
system off; connect a mask or tube to an outlet to exhaust any pressure in the system.
NOTE: Continuous pressure is applied to high pressure line until it is disconnected from
cylinder. A check valve will close when high pressure line is disconnected from
cylinder. The closing of this valve is frequently accompanied by a loud popping
sound.
(d) Carefully unscrew high pressure feed/recharge line at regulator until pressure decreases
and then remove line. Cap line immediately after removal.
(e) Disconnect high pressure relief line from regulator. Cap line immediately after removal.
(f) Disconnect low pressure line from regulator. Cap line immediately after removal.
(g) Loosen and open clamps securing oxygen cylinder to its shelf.
(h) If necessary, move cylinder slightly to gain access to regulator valve control arm.
Disconnect regulator valve control cable from cylinder by removing the retaining screw
and clamp from the cable support bracket and the cotter pin attaching the cable to the
control arm. Take care not to kink cable.
CA
UTION: OPENING CONTROL VALVE DURING REMOVAL OF OXYGEN LOW
PRESSURE LINE FROM CYLINDER WILL RESULT IN AN UNCHECKED
FLOW OF OXYGEN INTO BAGGAGE COMPARTMENT UNTIL VALVE CAN
BE CLOSED.
(i) Safety valve on cylinder in the OFF position.
(j) Remove cylinder from airplane.
(2) Installation
(a) If cylinder mounting shelf has been removed, reinstall it first.
(b) Position cylinder in airplane as shown in Figures 1 and 5. Ensure that regulator valve
control arm is free to move and does not contact surrounding area.
(c) Attach and secure regulator valve control cable (use a new cotter pin), before securing
cylinder to shelf.
(d) Install and secure two cylinder hold down clamps.