Page 32.24 Chapter 32 Landing Gear R66 Maintenance Manual SEP 2012
32-64 System Maintenance (continued)
B. Inflation Check (continued)
5. Disconnect D674-1 hose assembly from pressure cylinder valve immediately after
initial pressure check. Install protective cap on cylinder valve fitting. Cover D674-1
hose fitting to prevent contamination, but do not install an air tight seal (D674-1 hose
must be allowed to leak to verify check valve function at each float chamber).
6. Verify no rips or chafing on floats or covers.
7. One to two hours after initial pressure check, again record OAT and pressure in
each float chamber. Allowable chamber pressure drop from initial measurement is
0.20 psi adjusted for any temperature change. For example, float chamber pressure
will decrease 0.6 psig if temperature drops 10 degrees C.
8. If leaks are detected, repair float with supplied repair kit then perform leak check per
Section 32-64 Part A on repaired float chamber.
9. Connect D674-1 hose assembly to valve fitting. Orient line as required to maintain
minimum 0.25 inch clearance to cylinder and C390-5 panel. Torque B-nut per
Section 20-33 and torque stripe.
10. Pack floats per Section 32-63 Part C.
NOTE
Annually apply A257-7 dry-film lubricant (see Section 20-78) to
float cover snap mating surfaces.
11. Remove cylinder assembly and depressurize cylinder per Section 32-61 Parts A &
B. Return cylinder to RHC for overhaul-exchange.
12. Install serviceable cylinder assembly per Section 32-61 Part D.
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