FUEL ADAPTER AND NOZZLE ASSEMBLY (AVIM) (Continued)
6-6-5 TESTING (Cont)
Functional check. (Cont)
f. Connect 100 psig filtered air at regulator (27).
Tighten connection (28) securely.
g. Operate pressure regulating valve (29) gradually
until pressure gage (30) indicates 12.5 psig.
h. A full conical spray, free of spitting or drooling,
should appear at, or below 12.5 psig. An 'onion'
formation may or may not appear. Inspect.
i. Adjust pressure regulating valve (29) to increase
the fuel pressure to 60 psig. The volume of spray
should increase and be evenly spread about the center
axis of the fuel nozzle orifice. Inspect.
j. Spitting or drooling at 12.5 psig or more than 20
percent streakiness at 60 psig is reason for rejection.
Streakiness is defined as variations of
spray quantity in different parts of the
spray cone, showing up as darker
streaks in the spray.
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