AIR LINES AND FITTINGS (Continued)
Remove lockwire and disconnect tube nut (1) at
Install No. 4 union to tube nut (1) and torque tube
nut to 90 to 100 inch-pounds.
cleaning, use approved protective
equipment for eyes and face. Do not
use more than 30 psig air pressure.
Do not direct air toward yourself or
another person. Failure to comply
could result in injury, get medical
Connect an 80 ±
5 psi dry, clean air supply to No.
Allow five minute stabilization period, then apply
fluid (E. 38) to entire surface of all connections
throughout pneumatic system to check for leaks.
No leaks are permitted, other than that from
constant bleed hole at base of fuel control unit.
Leak testing fluid has a low viscosity
and readily forms an unbroken film
around connections. Any air leaks at
bubbles under film.
Wipe all fluid from connections if no leaks are
detected. If leaks are detected, disconnect faulty
connection and inspect for condition of associated parts.
Install replacement parts as necessary. Retorque and
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