REMOVE AFT FUEL TANK VENT VALVE
Do not puncture or scratch lining
of fuel tank. If lining is broken, fuel
penetrates and activates self-sealing
layers. Activated layers swell and trap
fuel. Activated green spongy material
also contaminates fuel system. This
makes it necessary to replace fuel
tank and flush fuel system.
Disconnect hose (7) from valve (8). Plug and
remove hose from tank (9).
Disconnect tube (10) from valve (8).
Remove four bolts (11) and washers (12).
Remove valve (8) and adapter (13) from tank
(9) as a unit.
Four different types of aft fuel cells
are used on the helicopter. Each is
interchangeable but has a different
assembly between valve adapter
and cell. Goodyear cells have four
bushings, FPT cells have an adapter
plate, and Uniroyal cells have nothing
between adapter and cell.
Remove shim plate (14) or four bushings (15)
from tank (9).
Cover access hole (16) in tank (9). Use barrier
material (E80) and tape (E388).