Flight Controls And Hydraulics Flashcards
Define DASH
Differential Airspeed Hold
Define ILCA
Integrated Lower Control Actuators
Define CCDA
Cockpit Control Driver Actuator
Define CPT
Control Position Transducer
provides position and rate-of-change information to CAAS
Define DCP
Differential Collective Pitch
What component improves control feel by reducing control sensitivity?
Viscous damper
How many flight Control Hydraulic Systems does the CH 47 have?
2
When can the Hydraulic Service Module be used to add fluid to the hydraulic systems?
Anytime
What is the purpose and location of the #1And #2Flight Hydraulic Reservoir/Coolers And Fans?
FWD & AFT pylons, cool and store excess hydraulic fluid
What is the purpose and location of the #1And #2 Flight Hydraulic Pumps?
1- right side of FWD XMSN
#2- left side of AFT XMSN
keeps fluid pressurized in their respective system, each pump pressurizes half of both upper dual boost actuators on the FWD and AFT rotor systems
What is the purpose and location of the #1And #2 Flight Hydraulic power control modules?
FWD & AFT Pylon/Controls pressurized and return fluid for their respective systems
The lower control pressure control modules (LCPCMs) reduce pressure from ______ psi to ______psi for the operation of the____________.
3,000 psi
1,500 psi
ILCAs
What must be done if a jam indicator is found extended on preflight?
Contact maintenance
What is the purpose and location of the upper dual boost actuators?
Underneath the Forward and aft swashplates, transmit input into the swashplates (pivoting and swiveling UDBA)
What are the two sides of a PTU and what are their purpose?
Utility hydraulic side and flight hydraulic side
allow utility hydraulic system to pressurize flight hydraulic system
When will the flight hydraulic pumps provide hydraulic pressure to the system?
When the rotors are turning
What are the two drains on the flight hydraulic pumps and the purpose of each?
Seal drain- allows fluid to drain if a leak develops from either the transmission or the pump
Case drain-cooling and lubrication (1 gallon per minute, fault at 2.5 gallons per minute)
What does the HYD 1 or HYD2 FLT CONTR caution indicate?
A loss of pressure and/or fluid in the respective hydraulic system
If the HYD FLT CONTR caution is active, what other caution will also be active?
Associated AFCS caution
The No.1 and No.2 flight hydraulic systems are identical. They are _________ in operation, ________ separated, and __________ integrated.
Parallel in operation, hydraulically separated, and electronically integrated
Where are the accumulators for the No 1. And No 2. Flight Hydraulic Control Systems located?
What do they do?
They are located on the pressure control modules for their respective systems, in between the return filter and pressure filter.
They dampen low frequency pressure surges and provide stored hydraulic power for peak loads.
What hydraulic psi is supplied by the engine starter system for normal engine starts?
3,350 psi
(3,000 psi from the utility hydraulic pump is sufficient in other than normal conditions)
Power Control Module
ILCA Manifold
Power Transfer Unit
Flight Hydraulic Pump
Lower Control Pressure Control Module
Integrated Lower Control Actuators
First Stage Mixing Unit
Second Stage Mixing Unit
