Slope Operations

Objective

The CFI candidate will demonstrate the ability to teach slope operations by explaining the elements, factors, and techniques involved while demonstrating proper slope approach, touchdown, and departure procedures. Upon completion, the CFI candidate will be able to identify suitable slopes, explain dynamic rollover prevention, demonstrate proper control technique throughout all phases, and analyze common errors associated with slope operations per ACS task HI.VIII.E.

Content

Elements Related to Slope Operations (HI.VIII.E.K1)

Slope operations involve landing on or taking off from sloping terrain where one skid or wheel contacts the surface before the other. This advanced maneuver requires precise control coordination and thorough understanding of helicopter limitations.

Key Elements:

• Upslope skid contact first during landing
• Gradual lowering of downslope skid with cyclic control
• Maintaining heading and preventing lateral drift
• Proper control neutralization after touchdown
• Smooth transition back to hover for departure

Teaching Analogy: Think of slope operations like parking a car on a steep hill - you must be deliberate, use proper technique, and understand the forces at work to prevent unwanted movement.

Factors for Selecting Appropriate Slopes (HI.VIII.E.K2)

Primary Selection Criteria:

• Slope angle within manufacturer limitations (typically 15° maximum)
• Surface composition - firm, stable ground preferred
• Adequate size for helicopter dimensions plus safety margin
• Clear approach and departure paths
• Wind direction relative to slope orientation
• Absence of loose debris, rocks, or obstacles

Evaluation Process:

1. Overfly the area for initial assessment
2. Check for surface stability and composition
3. Identify potential hazards (power lines, obstacles)
4. Confirm slope angle is within limits
5. Plan approach and departure routes

Effect of Wind on Slope Operations (HI.VIII.E.K3)

Wind significantly impacts slope operation safety and technique:

Upslope Wind (Preferred):

• Provides natural lift assistance
• Easier control during approach
• More stable during landing phase
• Assists with departure

Downslope Wind:

• Creates challenging control situation
• May require higher power settings
• Increases dynamic rollover potential
• Generally avoided when possible

Crosswind Considerations:

• Can induce unwanted lateral drift
• Affects cyclic control requirements
• May create turbulence near terrain
• Requires constant correction inputs

Dynamic Rollover Considerations (HI.VIII.E.K4)

Dynamic rollover occurs when the helicopter pivots around the downslope skid, potentially leading to loss of control.

Contributing Factors:

• Excessive lateral cyclic input
• High gross weight conditions
• Soft or uneven surface conditions
• Rapid or abrupt control inputs
• Operating near slope limitations

Prevention Techniques:

• Make smooth, deliberate control inputs
• Monitor cyclic position continuously
• Abandon operation if approaching control limits
• Ensure proper weight and balance
• Select firm, stable landing surfaces

Recovery Techniques:

• Immediately lower collective if rollover begins
• Apply opposite cyclic to stop roll motion
• Consider lifting off if safe to do so
• Avoid overcorrection that might induce rollover in opposite direction

Helicopter Slope Limitations (HI.VIII.E.K5)

Manufacturer Limitations:

• Maximum slope angle (typically 15°)
• Gross weight restrictions
• Center of gravity limitations
• Surface condition requirements

Operational Considerations:

• Density altitude effects on performance
• Available power margins
• Cyclic control authority remaining
• Pilot experience and proficiency levels

Common Errors (HI.VIII.E.K6)

1. Excessive approach angle - Too steep approach path
2. Poor slope selection - Exceeding limitations or unsuitable surface
3. Inadequate wind consideration - Failing to account for wind effects
4. Abrupt control inputs - Causing dynamic rollover tendency
5. Premature collective reduction - Losing control authority
6. Improper heading control - Allowing unwanted yaw movement

Risk Management

Operations on a Slope (HI.VIII.E.R1):

• Thoroughly brief the operation beforehand
• Ensure adequate performance margins exist
• Have abort criteria clearly established
• Maintain constant situational awareness

Loss of Tail Rotor Effectiveness (HI.VIII.E.R2):

• Consider wind direction and terrain effects
• Maintain adequate airspeed during approach
• Be prepared for unexpected yaw inputs
• Position aircraft to minimize LTE susceptibility

Passenger Safety and Rotor Hazards (HI.VIII.E.R3):

• Brief passengers on approach and departure procedures
• Establish clear communication signals
• Ensure passengers understand rotor disc area
• Maintain positive aircraft control throughout passenger movement

Dynamic Rollover Prevention (HI.VIII.E.R4):

• Monitor cyclic position continuously
• Make smooth, progressive control inputs
• Establish abort criteria before beginning operation
• Maintain adequate power margins

Surface Conditions Assessment (HI.VIII.E.R5):

• Evaluate surface stability before commitment
• Consider effects of loose material or debris
• Assess drainage and moisture conditions
• Identify potential shifting or unstable areas

Collision Hazards (HI.VIII.E.R6):

• Maintain clearance from terrain and obstacles
• Monitor tail rotor clearance continuously
• Be aware of main rotor disc proximity to terrain
• Plan escape routes for emergency situations

Slope Limitation Compliance (HI.VIII.E.R7):

• Know and respect manufacturer limitations
• Use slope angle measurement tools when available
• Consider cumulative effects of weight, density altitude, and slope angle
• Establish conservative personal limitations

Schedule

Equipment

Required References:

• FAA-H-8083-21A Helicopter Flying Handbook, Chapter 11
• FAA-H-8083-4 Helicopter Instructor’s Handbook
• Aircraft Flight Manual/Pilot Operating Handbook
• Current sectional chart for local area

Materials and Visual Aids:

• Helicopter configured for normal operations
• Pre-flight inspection checklist
• Before landing checklist
• Slope angle measurement tool (clinometer or smartphone app)
• Whiteboard/markers for diagram illustration
• Wind direction indicator (windsock or streamer)

Safety Equipment:

• First aid kit accessible
• Fire extinguisher available
• Emergency communication device

Instructor Actions

The CFI candidate will demonstrate teaching ability by:

1. Explaining slope selection process while pointing out suitable and unsuitable areas from the air, describing factors that make each location appropriate or inappropriate

2. Demonstrating proper approach technique while narrating control inputs, wind considerations, and safety margins maintained throughout the approach phase

3. Showing upslope skid contact with smooth, controlled descent while explaining the importance of maintaining heading and preventing lateral drift

4. Illustrating progressive downslope skid lowering while monitoring cyclic position and explaining dynamic rollover prevention techniques

5. Demonstrating control neutralization after touchdown while explaining the importance of this step for passenger safety and aircraft stability

6. Performing smooth departure transition while explaining the sequence of control inputs required for safe slope departure

7. Analyzing student errors by identifying common mistakes and providing specific, actionable correction techniques

8. Teaching risk assessment by explaining how to evaluate slope angle, surface conditions, wind effects, and performance margins

9. Demonstrating abort procedures if conditions become unsuitable, showing proper technique for safe operation abandonment

Student Actions

The student (DPE) observing the demonstration will:

1. Ask questions about slope selection criteria and demonstrate understanding of limiting factors

2. Identify risk factors present in the demonstration scenario and explain how they would be managed

3. Describe control techniques being demonstrated and explain the reasoning behind each input

4. Recognize teaching points being emphasized and confirm understanding of critical safety elements

5. Evaluate instruction quality based on clarity, technical accuracy, and adherence to ACS standards

6. Challenge scenarios by proposing “what if” situations to test CFI candidate’s knowledge depth

7. Request clarification on any teaching points that need additional explanation or demonstration

Completion Standards

The CFI candidate’s performance will be evaluated as satisfactory when they demonstrate the ability to teach slope operations and can:

Knowledge Teaching Standards (HI.VIII.E.K):

• Clearly explain all elements of slope operations including approach, landing, and departure phases
• Identify and describe factors for slope selection with specific examples
• Explain wind effects on slope operations with practical applications
• Describe dynamic rollover causes, prevention, and recovery with demonstration
• State helicopter slope limitations and explain their importance
• Identify and correct common errors with specific teaching techniques

Risk Management Teaching (HI.VIII.E.R):

• Demonstrate thorough slope operation risk assessment
• Explain conditions leading to loss of tail rotor effectiveness
• Address passenger safety and rotor blade hazards
• Identify and prevent dynamic rollover conditions
• Assess surface conditions appropriately
• Identify collision hazards and mitigation strategies
• Ensure compliance with manufacturer slope limitations

Skill Demonstration Standards (HI.VIII.E.S):

• Select suitable slope meeting all criteria
• Complete appropriate checklists systematically
• Demonstrate proper approach considering wind and obstacles
• Maintain powerplant and Nr within normal operating limits throughout
• Maintain heading within ±5° and prevent unwanted aircraft movement
• Execute smooth, positive descent to upslope skid contact
• Recognize slope limitations and demonstrate abort technique if needed
• Maintain positive control during downslope skid lowering
• Properly neutralize controls after landing
• Execute smooth transition to stabilized hover
• Demonstrate proper departure from slope
• Maintain specified heading ±5° throughout all phases
• Identify, analyze, and teach correction of common errors

The CFI candidate must demonstrate teaching proficiency by providing clear explanations, using effective teaching techniques, and maintaining flight safety throughout the demonstration per ACS task HI.VIII.E standards.