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18 Cards in this Set
- Front
- Back
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Saftey |
Hydraulic fluid decomposed by heat, toxic gases are released Contact with liquid/mist causes dermatitis and irritation to skin and eyes Ensure all personally are clear of moving flight controls when turning on hydraulics |
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Hydraulic power system |
Provides hydraulic pressure to operate flight controls servos, rotor brake and APU accumulator |
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Measuring particle contamination |
Portable oil diagnostic system (PODS)
Used to measure metallic and non-metallic contamination levels in A/C and SE that lead to system failure Patch testing - used as a last resort Used to measure metallic and non-metallic contamination levels in A/C and SE that lead to system failure Maximum contamination level are Navy class 5 for A/C and Navy class 3 |
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#1 pump |
Mounted on and driven by port accessory module Provides hydraulic pressure to the first stage of primary servos and first stage of tail rotor servo |
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#2 pump |
Mounted on and driven by starboard accessory module Provides hydraulic pressure to the second stage primary servos and pilot-assist servo assembly |
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Backup pump |
Supplies pressure to the #1 and #2 hydraulic systems prior to rotor engagement Only source of hydraulic pressure to rescue hoist, recharges APU accumulator, and provides emergency hydraulic pressure to #1 and #2 pumps when pressure loss occurs Powered by alternating current (AC) electrical motor
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Reservoir level-indicator |
Red, green and blue indicators Pressure and return filter with red PDI |
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Utility pump |
Provides hydraulic pressure for carriage, stream, tow and recovery system (CSTRS) winch Powered by main transmission |
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#1 transfer module |
Located inboard of transmission-driven pump Connects hydraulic pressure to flight controls servos like Routes fluid from #1 pump to 1st stage of primary servos and 1st stage of tail rotor servo Automatically route fluid from backup pump if #1 system is lost |
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#2 transfer module |
Located inboard of transmission-driven pump Connects hydraulic pressure to flight controls servos Identical to #1, except incorporates second-stage primary servo shutoff valve |
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Selector valve |
Directs hydraulic fluid from hand pump reservoir (holds 1.3 quarts) to the three pump modules or to the rotor brake master cylinder |
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Priority valve |
While backup pump is supplying pressure to #2 tail rotor servo, priority valve may secure hydraulic pressure to the rescue hoist due to low system pressure Opens at minimum pressure of 2,500 psi, closes at 2,150-2,250 psi |
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Reservoirs |
Attached to #1 pump Attached to #2 pump Attached to backup pump Servicing reservoir in hydraulics bay Utility reservoir aft of MGB in oil cooler section
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Servos |
Flight controls servos convert pilot and copilot control movements into appropriate motion on the main and tail rotors |
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Primary servos |
3 primary dual stage servos position and absorb feedback forces from main rotor In the even of single-stage failure, other stage is capable of handling flight controls loads |
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Tail rotor servo |
Dual-stage, controls position and absorb feedback from tail rotor Normally only pressurized by the first stage (second stage is automatically pressurized in event of first stage lost) |
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Pilot assist servos (Boost) |
Collective boost, pitch trim, pitch boost, and yaw boost Reduce loads at the collective sticks SAS and DAFCS signals are applied to these services to Sid in stabilizing helicopter |
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Rescue hoist |
Electrically controlled and hydraulically powered winch Provides means if rescuing downed personnel Has a load capacity if 600 lbs and has 0 to 215 ft-per-minute speed capability in either direction Located on stbd side on A/C |
