Figure 3-6.-Rain removal system.
on it. The A-6E rain removal system (for those
aircraft with airframes change number 268
incorporated) is discussed in the following
Description and Components
The rain removal system is controlled by the
windshield switch located on the air-conditioning
control panel in the cockpit. (See fig. 3-7.) The
system uses hot bleed air from the 12th stage
compressor section of each engine. The nosewheel
well bleed-air shutoff valve controls the flow of
hot bleed air to the rain removal system.
Then the rain-removal, pressure-regulator
shutoff valve controls the airflow from the rain-
removal system to the windshield. When this valve
is open, it allows hot bleed air to flow to the rain-
removal nozzle assembly. The nozzle distributes
the air through a series of diffuser outlets to form
a wide stream of hot air over the windshield. The
temperature of the air is lowered by a mixing
ejector at the inlet of the rain-removal nozzle
assembly. The ejector uses hot bleed air as its
primary air, and it draws secondary air from the
nose radome compartment to cool the rain-
In the next several paragraphs, we will discuss
the major components of the rain removal system.
You should know the location and functions of
these components to aid you in troubleshooting
and maintaining the system.
NOSEWHEEL WELL BLEED-AIR SHUT-
OFF VALVE. The nosewheel well bleed-air
Figure 3-7.-Air-conditioning panel.
shutoff valve is a butterfly-type that is