Piper PA-32R-301T SARATOGA S, Maintenance Manual

Page: 795 / 956

GENERAL.
INSPECTION OF EXHAUST SYSTEM.
(Refer to Figure 1 and Figure 2)
A very thorough inspection of the entire exhaust system, including heat exchange shroud, (muffler and
muffler baffles on PA-32R-301 or complete tailpipe assembly on PA-32R-301T). stacks and all exhaust
connections must be accomplished at each 100 hour inspection. The possibility of exhaust system failure
increases with use. It is recommended that the system be checked even more carefully as the number of
hours increase; for example an inspection at the 700 hour period would be more critical than one in the 100
hour period. The system should also be checked carefully before winter operation when the cabin heat will
be in use.
– CAUTION –
When removing or installing coupling clamp, slide clamp over
end of pipe before assembly. Excessive spreading can lead to
premature failure of clamp.
– NOTE –
It is recommended that all airplanes be fitted with a new (muf-
fler PA-32R-301 or tailpipe assembly for PA-32R-301T) at or
near 1000 hours of service life.
On PA-32R-301 removal of the tail pipe and stacks are required for inspection of the muffler baffles. On
PA-32R-301T removal of the tail pipe is required for inspection of the cabin heat shroud and heat sink
material under the shroud on the tail pipe. Remove or loosen all exhaust shields, cabin heat shroud, heat
blankets, etc., as required to permit inspection of the complete system. Perform the necessary cleaning
operations and inspect all external surfaces for dents, cracks and missing parts. Pay particular attention to
welds, clamps, supports and support attachment lugs, slip joints, stack flanges and gaskets. Inspect internal
baffles or diffusers on PA32R-301. Any cracks, warpage or severe oxidation are cause for replacement of
muffler or tail pipe assembly.
If any component is inaccessible for a thorough visual inspection, accomplish one of the following:
1. Perform a submerged pressure check of the PA-32R-301 muffler and exhaust stack at 2 psi air pressure
or perform a submerged pressure check of the tail pipe assembly at 20 psi air pressure on PA-32R-
301T airplanes.
2. Conduct a ground test using a carbon monoxide indicator by heading the airplane into the wind, warm-
ing the engine on the ground, advancing the throttle to full static RPM with cabin heat valves open,
and taking readings of the heated airstream inside the cabin at each outlet. Appropriate sampling pro-
cedures applicable to the particular indicator must be followed. If carbon monoxide concentration
exceeds .005 percent or if a dangerous reading is obtained on an indicator not calibrated in percent-
ages, the muffler on PA32R-301 or tail pipe assembly on PA-32R-301T must be replaced.
PIPER AIRCRAFT
PA-32R-301/301T
MAINTENANCE MANUAL
78-00-00
Page 78-1
Reissued: July 1, 1993
4C23