Operational Requirements – VII. Hovering Maneuvers, Task E: Slope Operations

Objective

The CFI candidate will demonstrate the ability to teach slope operations to the ACS standards for Task HI.18.E. Upon completion, the candidate will effectively explain and demonstrate parallel slope operations within manufacturer limitations or 5-10 degrees if no limitations are published, emphasizing thorough area assessment and risk management. The candidate will teach proper techniques for approaching, landing on, and departing from sloped terrain while maintaining aircraft control and safety margins.

Content

Introduction to Slope Operations

Slope operations represent one of the most challenging and potentially hazardous helicopter maneuvers. Think of it like parking a car on a steep hill - you need to understand the forces at work and have specific techniques to maintain control. The helicopter’s center of gravity, rotor system limitations, and ground contact points all create unique challenges when operating on sloped surfaces.

Manufacturer Limitations and Standards (HI.XVIII.E.K1, HI.XVIII.E.K2)

Published Limitations: When manufacturer slope limitations exist, they are absolute - never exceed them. These limitations consider:

• Main rotor clearance with cyclic displacement
• Tail rotor clearance
• Landing gear stress limits
• Center of gravity envelope changes
• Dynamic rollover susceptibility

Standard Practice Limitations: When no published limitations exist, restrict parallel slope operations to approximately 5-10 degrees maximum. This conservative approach provides safety margins for:

• Pilot technique variations
• Ground surface irregularities
• Wind effects
• Aircraft loading variations

Prohibited Operations (HI.XVIII.E.K3)

Uphill and downhill landings are prohibited during certification testing due to extreme hazards:

• Uphill landings: Severe tail rotor strike risk, loss of anti-torque effectiveness
• Downhill landings: Dynamic rollover potential, main rotor strike risk during departure

Only parallel slope operations (perpendicular to slope direction) are acceptable.

Area Assessment Requirements (HI.XVIII.E.K4, HI.XVIII.E.R1)

Systematic Area Review Process:

1. Overhead reconnaissance: Assess slope angle, surface conditions, obstacles
2. Wind evaluation: Determine wind direction relative to slope
3. Escape route planning: Identify abort options for each phase
4. Hazard identification: Power lines, loose debris, soft spots, holes

Critical Hazards to Identify:

• Rotor clearance obstacles (trees, structures, terrain features)
• Loose debris that could be blown by rotor wash
• Surface conditions (soft ground, loose rocks, ice)
• Wind shear areas or turbulence sources

Slope Operation Techniques

Approach Technique:

• Use steepest acceptable approach angle
• Approach into the wind when possible
• Maintain visual reference to both slope and obstacles
• Plan abort point before committing to landing

Landing Technique:

• Contact uphill skid first (like a see-saw effect)
• Gradually lower collective to settle onto slope
• Maintain slight upslope cyclic pressure
• Be prepared for immediate departure if settling occurs

Departure Technique:

• Lift off directly up from slope - no sideways movement
• Gain altitude before transitioning to forward flight
• Maintain rotor clearance throughout departure

Risk Management Integration (HI.XVIII.E.R2)

Conservative Decision Making:

• When in doubt about slope angle, don’t attempt the operation
• Always use maximum available power margins
• Consider aircraft loading effects on slope capability
• Account for density altitude effects on performance

Dynamic Rollover Prevention:

• Understand critical angle concepts
• Recognize rollover cues (lateral acceleration, skid sliding)
• Maintain positive aircraft control throughout operation

Teaching Methodology

Progressive Instruction Approach:

1. Ground school with visual aids showing forces and clearances
2. Demonstration flight with detailed explanations
3. Guided practice with immediate feedback
4. Independent practice with monitoring

Common Student Errors:

• Attempting slopes beyond aircraft/pilot capability
• Inadequate area assessment
• Poor wind awareness
• Rushing the operation without proper setup

Schedule

Equipment

Required References

• FAA-H-8083-4 Helicopter Instructor’s Handbook
• FAA-S-ACS-29 Helicopter Practical Test Standards
• Aircraft Flight Manual/Pilot’s Operating Handbook
• Sectional chart of local area

Visual Aids and Materials

• Slope angle demonstration tool (inclinometer or smartphone app)
• Whiteboard for force diagrams
• Photos/videos of proper slope operations
• Diagram showing rotor clearance requirements

Aircraft Equipment

• Dual-control helicopter appropriate for slope operations
• Current aircraft documentation
• Emergency equipment appropriate for terrain

Instructor Actions

The CFI candidate will:

1. Explain manufacturer limitations and testing standards while referencing specific aircraft documentation, demonstrating how to determine applicable slope limits for the aircraft being used

2. Conduct comprehensive pre-flight area assessment showing systematic evaluation techniques including overhead reconnaissance, hazard identification, and escape route planning

3. Demonstrate proper slope operation techniques including approach setup, landing sequence with uphill skid first contact, slope position maintenance, and safe departure procedures

4. Teach risk management strategies emphasizing conservative decision-making, dynamic rollover prevention, and recognition of limiting factors

5. Provide real-time coaching during student practice, offering specific feedback on technique and decision-making while maintaining safety oversight

6. Evaluate student performance against ACS standards, providing constructive feedback on areas needing improvement

Student Actions

The student will:

1. Participate in ground discussion by asking relevant questions about limitations, techniques, and hazards associated with slope operations

2. Demonstrate understanding of manufacturer limitations and standard practices through verbal explanation and reference to aircraft documentation

3. Conduct area assessment following systematic procedures taught by the instructor, identifying hazards and planning escape routes

4. Practice slope operations under instructor guidance, demonstrating proper approach, landing, and departure techniques

5. Self-assess performance by comparing their execution to ACS standards and identifying areas for improvement

6. Ask clarifying questions about any aspect of slope operations they don’t fully understand

Completion Standards

The CFI candidate successfully completes this lesson when they demonstrate the ability to teach slope operations to ACS Task HI.18.E standards by:

1. Teaching manufacturer limitations compliance - accurately explaining how to determine and apply slope limitations from aircraft documentation, or applying the 5-10 degree standard when no limitations are published (HI.XVIII.E.K1, HI.XVIII.E.K2)

2. Emphasizing prohibited operations - clearly explaining why uphill/downhill landings are not permitted during certification and the associated hazards (HI.XVIII.E.K3)

3. Demonstrating systematic area assessment - conducting thorough area review that identifies all relevant hazards and ensures adequate clearances (HI.XVIII.E.K4, HI.XVIII.E.R1, HI.XVIII.E.S2)

4. Teaching conservative limitations adherence - consistently applying manufacturer limitations or 5-10 degree limits with appropriate safety margins (HI.XVIII.E.R2)

5. Demonstrating proper slope operation techniques - executing parallel slope operations within published limitations or 5-10 degrees if none published, with smooth control inputs and adequate safety margins (HI.XVIII.E.S1)

6. Maintaining instructional standards - providing clear explanations, appropriate guidance, and accurate performance assessment throughout the lesson

The lesson meets ACS standards when the CFI candidate can effectively teach slope operations with emphasis on safety, proper technique, and regulatory compliance.