R
EVISION
:
-
D
ATE
:
12/29/04
P
AGE
:
16
Copyright
2004 Glasair Aviation, LLC Arlington, Washington All rights reserved
If the engine is not equipped with an external, full-flow oil filter, drain
the crankcase oil and then replace and safety-wire the drain plug.
Clean the oil suction and oil pressure screens, and check for metal
particles. Check all oil lines for leaks, chafing, dents or cracks. Refill
the engine with fresh oil.
7-7.5 E
XHAUST
S
YSTEM
Check the attaching flanges at the exhaust ports on the cylinders for
evidence of leakage. Examine the exhaust manifold for general
condition. Inspect for cracks, especially in the cabin heat muff area.
Soot on the inside surface of the heat muff shroud indicates the
presence of cracks. Any cracks must be repaired by welding before
further flight.
W A R N I N G
Stainless steel exhaust systems must be repaired by qualified
personnel using special methods to prevent contamination of
the metal during welding, otherwise cracking may persist.
7-7.6 C
YLINDERS
Check the rocker box covers for evidence of oil leaks. If leaks are
found, replace the gaskets and tighten the screws to 50 inch-pounds.
Check the cylinders for cracked cooling fins and for excessive heat
which is indicated by burned paint on the cylinder. Excessive heat is
indicative of internal damage to the cylinder; if found, its cause must be
determined and corrected before the aircraft resumes operation.