CSP
−
900RMM
−
2
MD Helicopters, Inc.
Rotorcraft Maintenance Manual
Page 1
Original
21-20-00
VENT SYSTEM
DESCRIPTION AND OPERATION
1. Vent System
The vent system introduces outside air into
the cabin and crew compartment. Air enters
through an air inlet duct above the transmis
sion deck. Air is routed into a water separator
to remove moisture (rain), while maintaining a
constant air flow. A two speed vent fan, located
on the transmission deck is used to induce
airflow. Air enters the cockpit and cabin area
through a plenum, air ducts and gasper
assemblies.
2. Vent System Components
A. Inlet Duct
An inlet duct is attached to the right side of
the forward swashplate fairing assembly. An
inlet hole measuring five inches in diameter is
covered with an air scoop and screen to allow
outside air in for the air vent system.
B. Water Separator
The water separator is located immediately
downstream from the inlet duct. Outside air
enters the water separator. Moisture (rain)
entering the water separator with fresh air is
centrifugally extracted to the bottom of the
water separator when the air makes a 180
degree turn and flows into a vent fan. Water is
drained from the separator when a rubber
check valve opens into on the transmission
deck.
C. Vent Fan
The vent fan is used to initiate and sustain air
flow at 180 cubic feet per minute. The fan is a
two speed vane axial type with an aluminum
impeller. The fan is powered by a 28 vdc
brushless motor. The vent fan is mounted at
fuselage station 185.5 on the right side of the
transmission deck. A five position
AC/VENT
switch controls the vent fan and air condition
ing.
VENT LOW
provides vent air at a low
setting.
VENT HIGH
provides air at a high
setting, selected from the center console utility
panel assembly.
D. Air Supply Plenum
The air supply plenum distributes the air flow
from the inlet duct and vent fan to the air
ducts. The air supply plenum is constructed of
composite fiberglass.
E. Air Ducts
Air ducts route air directly to the gasper
assemblies from the air supply plenum. The
air ducts are constructed of silicon rubber
coated woven fiberglass, with a nylon heli-coil
reinforcement.
F. Crew Station Gasper Assemblies
Four crew station gasper assemblies allow air
to be directed into the cockpit. The gasper
assemblies are constructed of aluminum and
are capable of delivering a flow volume of 20
cubic feet per minute. The gasper assemblies
utilize an inner cylindrical disc that allows air
to discharge at adjustable volume rates. A
finger rotation of the assembly will alternate
the gasper assembly's cylindrical disc to
change air flow discharge volume.
G. Passenger Gasper Assemblies
Passenger gasper assemblies are located at six
various locations in the passenger compart
ment ceiling. Gasper assemblies are
constructed of aluminum and are capable of
delivering air at a flow volume of 20 cubic feet
per minute. Gasper assemblies utilize an inner
cylindrical disc to discharge air at adjustable
volume rates. A finger rotation of the assembly
will alternate the gasper assembly's cylindrical
disc to change the air flow discharge volume.
Summary of Contents for CSP-900RMM-2
Page 19: ...CSP 900RMM 2 MD Helicopters Inc Rotorcraft Maintenance Manual INTRODUCTION Chapter ...
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Page 23: ...CSP 900RMM 2 MD Helicopters Inc Rotorcraft Maintenance Manual Section 01 00 00 Introduction ...
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Page 223: ...CSP 900RMM 2 MD Helicopters Inc Rotorcraft Maintenance Manual DIMENSIONS AND AREAS Chapter ...
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Page 249: ...CSP 900RMM 2 MD Helicopters Inc Rotorcraft Maintenance Manual LIFTING AND JACKING Chapter ...
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Page 273: ...CSP 900RMM 2 MD Helicopters Inc Rotorcraft Maintenance Manual Section 08 20 00 Leveling ...
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Page 277: ...CSP 900RMM 2 MD Helicopters Inc Rotorcraft Maintenance Manual TOWING Chapter ...
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Page 281: ...CSP 900RMM 2 MD Helicopters Inc Rotorcraft Maintenance Manual Section 09 00 00 Towing ...
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Page 287: ...CSP 900RMM 2 MD Helicopters Inc Rotorcraft Maintenance Manual PARKING AND MOORING Chapter ...
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Page 299: ...CSP 900RMM 2 MD Helicopters Inc Rotorcraft Maintenance Manual Section 10 20 00 Mooring ...
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Page 311: ...CSP 900RMM 2 MD Helicopters Inc Rotorcraft Maintenance Manual PLACARDS AND MARKINGS Chapter ...
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Page 333: ...CSP 900RMM 2 MD Helicopters Inc Rotorcraft Maintenance Manual SERVICING Chapter ...
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Page 337: ...CSP 900RMM 2 MD Helicopters Inc Rotorcraft Maintenance Manual Section 12 00 00 Servicing ...
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Page 401: ...CSP 900RMM 2 MD Helicopters Inc Rotorcraft Maintenance Manual Section 21 20 00 Vent System ...
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Page 525: ...CSP 900RMM 2 MD Helicopters Inc Rotorcraft Maintenance Manual EQUIPMENT FURNISHINGS Chapter ...
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Page 627: ...CSP 900RMM 2 MD Helicopters Inc Rotorcraft Maintenance Manual Section 25 60 10 Rescue Hoist ...
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Page 655: ...CSP 900RMM 2 MD Helicopters Inc Rotorcraft Maintenance Manual FIRE PROTECTION Chapter ...
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Page 711: ...CSP 900RMM 2 MD Helicopters Inc Rotorcraft Maintenance Manual FUEL SYSTEM Chapter ...
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Page 721: ...CSP 900RMM 2 MD Helicopters Inc Rotorcraft Maintenance Manual Section 28 00 00 Fuel System ...
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Page 887: ...CSP 900RMM 2 MD Helicopters Inc Rotorcraft Maintenance Manual HYDRAULIC SYSTEM Chapter ...
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Page 925: ...CSP 900RMM 2 MD Helicopters Inc Rotorcraft Maintenance Manual LANDING GEAR Chapter ...
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Page 983: ...CSP 900RMM 2 MD Helicopters Inc Rotorcraft Maintenance Manual DOORS AND WINDOWS Chapter ...
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Page 1049: ...CSP 900RMM 2 MD Helicopters Inc Rotorcraft Maintenance Manual FUSELAGE Chapter ...
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Page 1063: ...CSP 900RMM 2 MD Helicopters Inc Rotorcraft Maintenance Manual Section 53 00 00 Fuselage ...
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Page 1205: ...CSP 900RMM 2 MD Helicopters Inc Rotorcraft Maintenance Manual Section 53 40 00 Tailboom ...
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Page 1235: ...CSP 900RMM 2 MD Helicopters Inc Rotorcraft Maintenance Manual Section 53 55 00 Empennage ...
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Page 1259: ...CSP 900RMM 2 MD Helicopters Inc Rotorcraft Maintenance Manual Chapter MAIN ROTOR ...
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Page 1503: ...CSP 900RMM 2 MD Helicopters Inc Rotorcraft Maintenance Manual Section 63 20 00 Gearboxes ...
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Page 1579: ...CSP 900RMM 2 MD Helicopters Inc Rotorcraft Maintenance Manual Section 63 22 00 Rotor Brake ...
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Page 1619: ...CSP 900RMM 2 MD Helicopters Inc Rotorcraft Maintenance Manual ANTI TORQUE ASSEMBLY Chapter ...
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Page 1685: ...CSP 900RMM 2 MD Helicopters Inc Rotorcraft Maintenance Manual FLIGHT CONTROLS Chapter ...
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Page 1927: ...CSP 900RMM 2 MD Helicopters Inc Rotorcraft Maintenance Manual POWERPLANT Chapter ...
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Page 1935: ...CSP 900RMM 2 MD Helicopters Inc Rotorcraft Maintenance Manual Section 71 00 00 Powerplant ...
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Page 1985: ...CSP 900RMM 2 MD Helicopters Inc Rotorcraft Maintenance Manual Section 71 20 00 Engine Mounts ...
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Page 2001: ...CSP 900RMM 2 MD Helicopters Inc Rotorcraft Maintenance Manual Section 71 60 00 Air Intake ...
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Page 2033: ...CSP 900RMM 2 MD Helicopters Inc Rotorcraft Maintenance Manual Section 71 70 00 Engine Drains ...
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Page 2043: ...CSP 900RMM 2 MD Helicopters Inc Rotorcraft Maintenance Manual ENGINE BLEED AIR Chapter ...
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Page 2053: ...CSP 900RMM 2 MD Helicopters Inc Rotorcraft Maintenance Manual ENGINE CONTROLS Chapter ...
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Page 2105: ...CSP 900RMM 2 MD Helicopters Inc Rotorcraft Maintenance Manual ENGINE EXHAUST Chapter ...
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Page 2109: ...CSP 900RMM 2 MD Helicopters Inc Rotorcraft Maintenance Manual Section 78 00 00 Engine Exhaust ...
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Page 2121: ...CSP 900RMM 2 MD Helicopters Inc Rotorcraft Maintenance Manual ENGINE OIL Chapter ...
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Page 2125: ...CSP 900RMM 2 MD Helicopters Inc Rotorcraft Maintenance Manual Section 79 00 00 Engine Oil ...
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