PIPER SENECA II SERVICE MANUAL
14-75. TESTING FOR LEAKS.
(PIR-PPS60087, Rev. R.)
Leak-Tec Formula #16-OX (available from Scott Aviation) is recommended for leak testing. Refer to the
List of Consumable Materials.
a.
Remove the royalite covers in the baggage compartment and, with oxygen system turned off,
disconnect the low pressure supply line and connect it to a regulated cylinder charged with dry
nitrogen.
NOTE: Whenever a leak check is performed, all fitting connections as well as other questionable
areas, should be inspected.
b.
Apply the leak detector solution to the test surface and watch for indication of leakage.
c.
Large leaks will produce bubbles immediately, but small leaks will form a white foam in 5 to 60
seconds.
d.
With outlets vacated of masks, connect a test pressure gauge (Figure 14-20b) to the copilot's outlet
(Figure 14-20) as described in Inspection and Maintenance, above.
e.
Adjust the regulator on the dry nitrogen cylinder for 100 psi and check for leakage at the outlets.
f.
Correct any leaks and wipe off excess leak detector solution.
g.
Close the valve on the nitrogen gas tank and insert a flow test apparatus (or equivalent) (Figure 14-
20b) to relieve system pressure.
h.
Disconnect pressure test gauge, flow test apparatus, and nitrogen tank.
i.
If the oxygen cylinder is not to be hooked up or installed immediately, cap and cover the exposed
fittings with new clean plastic bags. Temporarily support lines as needed to prevent damage. Make
sure caps and coverings are as clean as possible.
14-76. NOT USED.
XIV - ACCESSORIES AND UTILITIES
01/01/09
3C20
Содержание PA-34-200T Seneca II
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