Piper PA-34-200T Seneca II, Service Manual

Page: 811 / 869

PIPER SENECA II SERVICE MANUAL
XIV - ACCESSORIES AND UTILITIES 01/01/09
3C16
i. Oxygen Lines Clearance Check
(PIR-PPS60087, Rev. R.)
Make sure to check the oxygen lines for proper clearance as follows: (Refer to Figure 14-20b.)
1. 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.
2. At least 1/2 inch minimum between oxygen tubes and all rigid moving parts of the aircraft
such as levers and rigid control rods.
3. Six inch minimum separation between oxygen tubes and hydraulic, fuel and electrical system
lines and components. 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. (See Figure 14-
20b, Sketch C.)
4. A minimum of 1/8 inch between tubing and structure adjoining the supporting clamp as shown
in Figure 14-20b, Sketch A.
5. 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 14-20b, Sketch D.
6. 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. (See
Figure 14-20b, Sketch B.)
j. Perform any other required maintenance as directed in AC43.13-1, latest revision, Chapter 8.
k. Clean components as necessary per Oxygen System Components, Cleaning and Purging, below.
l. If cylinder is completely empty, it must be completely disassembled and inspected in an FAA
approved facility before recharging.