Straight Descents and Descending Turns

Objective

The CFI candidate will demonstrate the ability to teach straight descents and descending turns per ACS task HI.XI.D. Upon completion, the CFI candidate will effectively explain the purpose and procedures, demonstrate proper control inputs and visual references, integrate flight instruction techniques, identify common errors, and manage associated risks. The candidate will meet the teaching standards outlined in HI.XI.D while demonstrating competency in both flight performance and instructional delivery.

Content

Purpose and Procedures (HI.XI.D.K1)

Straight descents and descending turns are fundamental maneuvers that allow pilots to lose altitude efficiently while maintaining directional control. These maneuvers are essential for:

• Normal approach operations
• Traffic pattern entries
• Navigation between altitude levels
• Emergency procedures requiring rapid altitude loss

Straight Descent Procedures:

1. Reduce collective to initiate descent
2. Apply slight aft cyclic to maintain airspeed
3. Maintain heading with pedals
4. Adjust collective as needed to control rate of descent
5. Monitor airspeed, altitude, and vertical speed

Descending Turn Procedures:

1. Initiate turn with lateral cyclic
2. Reduce collective to begin descent
3. Coordinate with pedals to prevent adverse yaw
4. Maintain desired airspeed and descent rate
5. Monitor bank angle and turn coordination

Flight Control and Trim Use (HI.XI.D.K2)

Primary Control Effects:

• Collective: Primary control for descent rate - lowering collective reduces lift and initiates descent
• Cyclic: Controls airspeed and turn entry - slight aft pressure maintains airspeed as collective is lowered
• Pedals: Maintain coordination and heading - compensate for torque changes as collective is adjusted

Control Coordination: As collective is reduced, less engine power is required, reducing torque. Right pedal input may be needed to maintain heading. The amount varies with aircraft type and descent rate.

Trim Considerations: In aircraft equipped with trim systems, proper trim reduces control pressures and pilot workload during extended descents.

Visual References (HI.XI.D.K3)

Attitude References:

• Horizon relationship for pitch attitude
• Reference points on windscreen for consistent sight picture
• Bank angle assessment using horizon and aircraft attitude

Performance References:

• Airspeed indicator for speed control
• Altimeter for altitude awareness
• Vertical speed indicator for descent rate
• Turn coordinator for coordination in turns

Outside References:

• Ground references for wind drift assessment
• Traffic scan for collision avoidance
• Landing area identification during approaches

Integrated Flight Instruction (HI.XI.D.K4)

Effective instruction integrates multiple elements simultaneously:

• Performance-based instruction: Focus on specific, measurable outcomes
• Scenario-based training: Use realistic situations like traffic pattern entries
• Positive transfer: Connect to previously learned maneuvers like straight-and-level flight
• Progressive instruction: Build complexity from straight descents to turning descents
• Error analysis: Immediate feedback and correction techniques

Teaching techniques include demonstration, guided practice, and independent performance with decreasing instructor intervention.

Common Errors (HI.XI.D.K5)

Altitude/Descent Rate Errors:

• Excessive or insufficient descent rate
• Failure to arrest descent at target altitude
• Inconsistent descent performance

Airspeed Errors:

• Allowing airspeed to increase excessively
• Insufficient airspeed control during descent
• Poor airspeed/attitude coordination

Directional Control Errors:

• Heading deviations in straight descents
• Uncoordinated flight in turns
• Overcontrolling pedal inputs

Turn Execution Errors:

• Improper bank angle control
• Poor turn entry/recovery technique
• Failure to maintain desired descent rate during turns

Risk Management

Distractions and Situational Awareness (HI.XI.D.R1):

• Maintain primary focus on aircraft control while scanning for traffic
• Prioritize flight path management over secondary tasks
• Use systematic scan patterns to prevent fixation
• Recognize signs of disorientation and take corrective action
• Establish clear task priorities: aviate, navigate, communicate

Collision Hazards (HI.XI.D.R2):

• Maintain enhanced traffic vigilance during descent operations
• Use radio calls when appropriate for position awareness
• Understand traffic pattern procedures and right-of-way rules
• Scan systematically for converging traffic
• Consider aircraft performance differences when operating near faster aircraft

Instructional Techniques

Demonstration Phase: Show complete maneuver while explaining each step Guided Practice: Student performs with instructor coaching Independent Practice: Student performs while instructor monitors Error Correction: Immediate feedback using positive approach Assessment: Continuous evaluation against completion standards

Schedule

Equipment

Required References:

• FAA-S-ACS-29 Helicopter Airman Certification Standards
• FAA-H-8083-4 Helicopter Instructor’s Handbook
• FAA-H-8083-21 Helicopter Flying Handbook
• Aircraft-specific POH/AFM

Training Materials:

• Whiteboard or flip chart for diagram illustration
• Aircraft performance charts
• Visual aid showing proper sight pictures
• Error demonstration examples

Aircraft Requirements:

• Dual-control training helicopter
• All required instruments operative
• Adequate fuel for training flight
• Current weight and balance

Instructor Actions

The CFI candidate will demonstrate the ability to:

1. Explain maneuver purpose and procedures clearly using appropriate terminology and logical sequence
2. Demonstrate proper control technique while providing simultaneous explanation of inputs and aircraft response
3. Show correct visual references and explain sight picture interpretation for both inside and outside references
4. Execute both straight descents and descending turns meeting ACS standards while maintaining instructional commentary
5. Identify and correct student errors using appropriate critique techniques and immediate feedback
6. Integrate risk management concepts throughout the instruction, emphasizing collision avoidance and situational awareness
7. Assess student performance against measurable standards and provide constructive feedback
8. Demonstrate recovery techniques from common errors while explaining the correction process

Student Actions

The student (examiner) will:

1. Listen actively to instruction and ask relevant questions about procedures and techniques
2. Observe demonstrations while taking notes on key teaching points and control inputs
3. Practice maneuvers following instructor guidance and responding to coaching inputs
4. Demonstrate understanding by explaining procedures back to instructor when requested
5. Exhibit common errors when prompted to allow instructor error analysis demonstration
6. Respond to corrections by implementing suggested improvements
7. Ask questions about risk management and decision-making scenarios
8. Evaluate instruction quality based on clarity, accuracy, and teaching effectiveness

Completion Standards

The CFI candidate successfully completes this lesson when they demonstrate the ability to teach straight descents and descending turns per ACS task HI.XI.D by:

Knowledge Demonstration (HI.XI.D.K1-K5):

• Clearly explaining the purpose and procedures for both maneuvers with 100% accuracy
• Demonstrating complete understanding of control inputs and coordination requirements
• Identifying all visual references with specific examples
• Showing effective integration of flight instruction techniques
• Recognizing and explaining all common errors with appropriate correction methods

Risk Management (HI.XI.D.R1-R2):

• Addressing distraction management and situational awareness with specific examples
• Explaining collision hazard mitigation with practical applications

Skill Demonstration (HI.XI.D.S1-S2):

• Establishing, maintaining, and recovering from descents within ±100 feet of target altitude
• Maintaining airspeed within ±10 knots of target speed
• Demonstrating coordinated flight throughout all maneuvers
• Analyzing and correcting errors using appropriate instructional techniques
• Maintaining heading within ±10 degrees in straight descents
• Executing turns with proper bank angle and coordination

Instructional Standards:

• Delivering clear, logical instruction sequence
• Demonstrating maneuvers while providing simultaneous explanation
• Using appropriate teaching techniques for skill level
• Providing effective error analysis and correction
• Maintaining professional demeanor and positive learning environment