CH-47D Cargo Handling System

Cargo Handling

Terminal Learning Objective (TLO) Action: Describe the components, operational characteristics, functions, limitations and emergency procedures of the CH-47D Cargo Handling Systems Conditions: In a classroom, and given a student handout Standards: Correctly answer in writing, without reference, four of six questions pertaining to components, operational characteristics, limitations, functions, and emergency procedures of the CH-47D Cargo Handling System, IAW TM 1−1520−240−10 (Operator’s manual) and the student handout

Terminal Learning Objective (TLO) – (Cont.) Safety Requirements: None Risk Assessment Level: Low Environmental Considerations: None Evaluation: Each student will be evaluated on this block of instruction during the third written examination. This will be a criterion type examination requiring a GO on each scored unit. You will have 90 minutes for the exam

Learning Step/Activity #1 Describe the components, operational characteristics, functions, emergency procedures and limitations of the Cargo Ramp/Door

Cargo Ramp/Door Located: Operated: Primary Use: Maximum Weight: Sta.486 Operated: Hydraulically Primary Use: Loading and Unloading Personnel and Cargo Maximum Weight: 3,000 LBS or 300 PSF Cargo Door: Jettisonable Provide Closure Contains a emergency exit panel

Components – Cargo Ramp

Ramp Control Valve Located: Purpose: Between Sta.482 and 502 R/H side Three position:- UP STOP DN (Down) Purpose: Used to Stop the Ramp between:- Full UP Full Down

Actuating Cylinders Located: Contains: Mechanical locks Prevents:- L/H and R/H side of the Ramp Hydraulically Contains: Mechanical locks Prevents:- Accidental opening Keeping ramp closed Hydraulically unlocked

Cargo Door Actuated Motor Located: Inside the ramp Contains: Reversible motor (Extend and Retract) Controlled: Sequence valve

Sequence Valve Located: Use: Purpose: R/H side Sta.490 Mechanically operate ramp Sequences:- Extension Retraction Purpose: Keep cargo door:- Retracted Do not press Valve Plunger Do not Unlock unless ramp is Down

Pressure Actuated Valve Purpose: Stop ramp operation:- Extending/Retracting cargo door Red plunger:- Manual override Use ONLY if ramp fails to operate normally

Ramp PWR Switch Located: Overhead hydraulics panel Switch: Three position:- OFF ON EMERG (Emergency)

Utility Return Control Module Located: L/H side Sta.534 Purpose: Central collection point Transfer cylinder:- Holds fluid (Actuators) Indication: Filter indicator

Emergency Utility Press Valve Located: R/H Side Ramp Sta.527 Purpose: Operate ramp:- Pressure from APU Start Accumulator

Learning Step/Activity #2 Describe the components, limitations, emergency procedures and operational characteristics of the Triple Cargo Hook system

Triple Cargo Hook System Page: 5-5-1 Rated: Center – 26,000 LBS Forward – 17,000 LBS Aft – 17,000 LBS Tandem – 25, 000 LBS (Fwd and Aft Hooks)

Center Cargo Hook Mounted: Sta.331 (Inside the Cabin Escape Hatch) Beam Assembly: Rotates, Pivots and allows the Hook to Swing Air Charge: Minimum – 2,000 PSI Types of opening: Hydraulically, Pneumatically, and Manually Manual Release: 2408-13 Entry

Forward and Aft Cargo Hook Rated: 17,000LBS 88° degrees (Fwd and Aft) 58° degrees (Left and Right) Located: Sta.249 Sta.409 Accessible: Ground Personnel Hook load 18-22 LBS Types of Release: Electrically (Normal/Emergency) Manually

Cargo Hook Control Panel MSTR (Master) Switch: MSTR RESET OFF ARM Hook Switch: Five position Switch position determines Hook Hook Load Lights: Fwd and Aft Illuminate – 150 LBS Sensors

Hoist Operator's Control Panel Located: R/H side Sta.320 Three Position: ARM, RMTE (Remote) and RESET Activated: MASTER switch – ARM

Master Caution/Advisory Panel Purpose: Indicates respective Hook – Open Turn lights off:- Master switch – RESET Dual Hook Fault Lights: Indicates loss of electrical power Fwd and Aft Hook – Manually

Jettisoning External Cargo Primary Method: CARGO HOOK EMERG switch – REL ALL Alternate Method: Forward, Center and Aft hook release lever – Pull aft Page: 9-2-1

Learning Step/Activity #3 Describe the components, limitations and operation of the Cargo Winch/Rescue Hoist system

Cargo Winch and Rescue Hoist System Located: Heater closet (Compartment) Hydraulic motor Mechanical brake Cable length:- 150 feet/1/4 inch (Steel) Purpose: Aid loading/Unloading – Cargo Hoist loads – Thru rescue hatch Accessories Storage: Pulleys Cable/Hook quick disconnect

Cable/Hook Quick Disconnect Cover Guard Cover Guard Cap Quick Disconnect Device Guard Cover – Must be installed

Selector Lever Mounted: Use: Normal Operation: Top of the winch assembly Use: Select Mode of operation RESCUE CARGO Normal Operation: No.1 DC Bus No.1 PDP

Cable Cutter Arming Device Located: Back wall Sta.95 Arming Device: Installed Winch – CARGO position

Maximum Load 12,000 LBS with the aid of pulleys

Straight Line Pull 3,000 LBS

One (1) Pulley Attached 6,000 LBS

Two (2) Pulley Attached 9,000 LBS

Additional Pulleys 12,000 LBS

Winching Out

Operators Manual Caution Do not exceed 3,000 pounds single line pull. Overload will result in the winch overload switch actuating to stop the winch Page: 4-3-8

Winching Operation Reel in speed: Remove slack: Limit switches: Single line pull – 0 to 20 feet per min (Cargo mode) Remove slack: Applying loads Limit switches: IN OUT Provide slack: Load is secure INTERNAL Load

Operators Manual Caution To prevent dangerous electrical shock to personnel being hoisted, the cable must touch the Ground or Water prior to contacting personnel Page: 4-3-13

Rescue Operation Rescue Mode – Hoisting light loads Selector Lever – RESCUE Position Cargo Hook – Removed Structural Limit – 600 LBS max Reel in Speed – 0 to 100 feet per min In Limit Switch

Cable Cutter Device Cable Cutter Device: Pulleys: Must be installed Sta.331 (Cutter device)

Hoist Controls Located: Cockpit overhead panel HOIST MASTER switch – REMOTE, OFF and PLT Rotary Control Switch – IN/OUT Cable Cutter Switch – CABLE CUT and ON (Red guarded)

Hoist Operator's Panel Located: R/H side Sta.320 CARGO HOOK RELEASE CABLE CUTTER (Red guarded) Toggle Switch – Winch cable IN/OUT PRESS TO TALK Winch Arming Trigger

Winch Control Valve Located: Use: Sta.120 L/H side Emergency Loss of electrical power Break shear wire Push in plunger Rotate knurled knob Return knob – Center (OFF)

Operators Manual Caution When the winch is operated in emergency mode, the cable limit switches are disabled Page: 4-3-9

Any Question?

Check on Learning What must you do to cause the ramp to raise or lower if it fails to operate normally? Press the red button on the Pressure Actuated Valve What is the primary method of jettisoning external cargo? EMER REL ALL switch What caution must be observed when operating the cargo winch in the emergency mode? Cable Limit Switches are inoperative How is the ramp kept closed (up) and locked? Mechanical Locks

Summary

Don’t Forget: EP’s and Limitations!