THE NEW PIPER AIRCRAFT, INC.
PA-32-301FT / 301XTC
MAINTENANCE MANUAL
PAGE 8
Jun 1/03
3I22
35-10-00
(4) An operational check of the regulator can be accomplished as follows: (Refer to Figure 3.)
(a) Using an 18 inch (45.72 cm) long hose having a 1/4 in. (0.635cm) I.D. x 1/2 in. (1.27cm)
O.D., attach a Scott Aviation 8570-00 plug-in to a sensitive pressure gauge having a
range of 0 to 100 psi. Connect the apparatus to the pilot's outlet in the overhead panel.
(b) Using a second 18 inch long hose having a 1/4 in. (0.635cm) I.D. x 1/2 in. (1.27cm) O.D.,
attach a Scott Aviation 8570-00 plug-in to a pneumatic flow apparatus having a range of
0-5 liters per minute. Connect the flow apparatus to the copilot's outlet.
(c) Insert a Scott plug-in in each of the other outlets and pull the oxygen control knob to the
on position. The pressure and flow at sea level should be 55 to 80 psi and 3.3 to 5.3 liters
per minute respectively.
(5) Check airframe logbook for last maintenance on oxygen system and perform as required per
Chart 3.
(6) Test the oxygen for odor. Pure oxygen is odorless and tasteless. Any system having a
significant odor present in the gas should be purged and the bottle replaced or removed and
purged.
(7) Any fittings, connectors, and tubes which have imperfect threads, pitted or disfigured cones, or
other damage should be replaced.
(8) Check plumbing for kinking, cracks, gouges, dents, deep scratches, or other damage. Replace
as necessary.
CAUTION: OXYGEN TUBES MUST NOT BE CLAMPED TO, OR SUPPORTED BY
ELECTRICAL WIRE BUNDLES, HYDRAULIC, PNEUMATIC OR OTHER LINES.
(9) Make sure to check the oxygen lines for proper clearance as follows: (Refer to Figure 4.)
(a) Two inch minimum between oxygen tubes and all flexible moving parts of the aircraft
(flexible control cables, etc.). If enough space cannot be attained, protection from abrasion
must be provided.
(b) At least 1/2 inch minimum between oxygen tubes and all rigid moving parts of the aircraft
such as levers and rigid control rods.
(d) Six inch minimum separation between oxygen tubes and hydraulic, fuel and electrical
system lines and components.
NOTE: When the six inch requirement cannot be complied with, one inch is allowed as
long as electrical cables and other lines are supported at least every two inches;
and, the oxygen tube(s) is protected by rubber neoprene hose fastened in place
with cable ties at the location the specific item crosses or is near the oxygen
tube(s). If an item is near the oxygen tube for a certain distance the oxygen tube
for that distance must be covered.
(d) A minimum of 1/8 inch between tubing and structure adjoining the supporting clamp as
shown in Figure 4, Sketch A.
(e) Where a tube passes through a grommet, the tube must not bear on the grommet in any
way that might cause cutting of the grommet in service as shown in Figure 4, Sketch D.
(f) While in service, items may receive vibrations causing them to come in contact with other
parts of the aircraft. With this in mind, low pressure tubing that is supported well enough
to prevent relative motion must have at least a minimum clearance of 1/8 inch from a
projection (bolt, nut, etc). Low pressure tubing that cannot be supported well enough to
prevent motion must have a minimum clearance of 1/8 inch allowed after the maximum
travel of the tube. High pressure lines are affected similarly but require 1/2 inch minimum
clearances. (Refer to Figure 4, Sketch B.)
(10 Perform any other required maintenance as directed in AC43.13-1 latest revision, Chapter 8.
(11) Clean components as necessary per Cleaning and Purging, below.
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