Before Takeoff Check

Objective

Upon completion of this lesson, the student will demonstrate the ability to perform a complete and systematic before takeoff check in accordance with FAA-S-ACS-15 Area of Operation II, Task D. The student will complete appropriate checklists, review takeoff performance and emergency procedures, verify powerplant parameters are suitable for takeoff, maintain proper rotor speed limits, and effectively divide attention between inside and outside the helicopter while explaining the purpose of each checklist item and identifying potential malfunctions.

Content

Regulatory Foundation

The before takeoff check is a critical safety procedure mandated by 14 CFR 91.103, which requires pilots to familiarize themselves with all available information concerning the flight. Additionally, 14 CFR 91.7 requires that no person may operate an aircraft unless it is in an airworthy condition, making the before takeoff check essential for confirming continued airworthiness.

Purpose of Before Takeoff Checklist Items

Systematic Verification Process The before takeoff check serves three primary purposes that work together like a final quality control inspection before a product leaves the factory. Each checklist item has a specific reason for being there, developed through decades of helicopter operations and accident analysis.

Reasons for Checking Each Item

• Flight Controls: Full and free movement confirms hydraulic systems are functioning and no mechanical binding exists that could cause control restriction during critical flight phases
• Engine Parameters: Oil pressure, temperature, and fuel flow verification ensures the powerplant will deliver reliable power throughout the flight
• Rotor System: Nr (rotor speed) within limits confirms the transmission and drive system are operating normally
• Electrical Systems: Battery and alternator checks ensure navigation equipment, radios, and engine monitoring systems will function reliably
• Fuel System: Quantity verification prevents fuel exhaustion, while boost pump operation ensures uninterrupted fuel flow during attitude changes
• Anti-Icing/Environmental: Pitot heat and carburetor heat (if equipped) preparation prevents icing-related emergencies

Detecting Malfunctions The before takeoff check acts like a diagnostic scan, catching problems before they become airborne emergencies. Think of it as the difference between finding a loose wheel bolt in your driveway versus discovering it at highway speed.

Key malfunction detection focuses:

• Abnormal Engine Parameters: High oil temperatures, low oil pressure, or unusual fuel flows indicate internal engine problems
• Hydraulic System Issues: Sluggish or heavy flight controls reveal hydraulic degradation that could lead to complete system failure
• Electrical Anomalies: Charging system problems or battery voltage issues that could result in total electrical failure
• Transmission Problems: Unusual vibrations, metal particles in sight gauges, or abnormal Nr behavior indicating drive system deterioration

Manufacturer Configuration Requirements Each helicopter model has specific configuration requirements based on its unique design characteristics and certification testing. Like following a recipe exactly, deviating from manufacturer procedures can compromise safety margins built into the aircraft’s certification.

Common configuration items include:

• Collective Position: Full down position reduces power demand and allows proper engine parameter verification
• Cyclic Position: Neutral position prevents uncommanded movement during power application
• Anti-Torque Pedals: Centered position establishes baseline for engine torque verification
• Switch Positions: Navigation lights, transponder, and other systems as required for the intended flight
• Weight and Balance: Final confirmation that loading remains within certified limits

Risk Management Considerations

Division of Attention Challenges The before takeoff check requires constant attention division between checklist completion and outside awareness. This is like a surgeon who must monitor the patient while reviewing the surgical checklist—both are critical and neither can be ignored.

Risk mitigation strategies:

• Position the helicopter to maintain visual contact with traffic patterns and approach paths
• Brief passengers on the procedure and request they assist with outside scanning
• Use the “challenge-response-verify” method rather than silent reading
• Pause checklist completion for any traffic conflicts or changing conditions
• Maintain situational awareness of wind changes, weather developments, or airport activity

ATC Communication Complexities Unexpected or unclear clearances create task saturation during an already demanding phase of flight. Unlike airline pilots with first officers to share the workload, helicopter pilots must manage both checklist completion and ATC communication simultaneously.

Managing ATC challenges:

• Request progressive taxi instructions if the route is complex
• Ask ATC to “stand by” if a clearance arrives during critical checklist items
• Repeat back any clearance that seems unusual or conflicts with normal procedures
• Don’t hesitate to request clarification—ATC prefers clear communication over assumptions
• Complete all checklist items before accepting takeoff clearance

Emergency Procedures Review

Before takeoff checks include reviewing emergency procedures specific to the departure phase:

• Engine Failure During Takeoff: Height/velocity diagram considerations and autorotation entry procedures
• Tail Rotor Failure: Immediate landing techniques and power management
• Hydraulic Failure: Control technique changes and landing considerations
• Fire or Smoke: Immediate action items and emergency landing procedures

Powerplant Parameter Verification

Engine parameters must fall within manufacturer-specified green arc ranges:

• Oil Pressure: Typically 25-100 PSI depending on engine type and temperature
• Oil Temperature: Generally 180-245°F maximum, varying by engine model
• Fuel Flow: Appropriate for power setting and atmospheric conditions
• EGT/TIT: Within normal operating ranges for current conditions
• Nr: Maintained within ±5% of normal operating range (typically 97-107% Nr)

Schedule

Equipment

• Robinson R22/R44 helicopter or applicable training helicopter
• Manufacturer’s checklist (laminated or digital)
• FAA-H-8083-21B Helicopter Flying Handbook
• Helicopter flight manual/pilot’s operating handbook
• Watch or timer for monitoring check duration
• Kneeboard and writing materials
• Airport diagram and current weather information
• ATC frequency reference card

Instructor Actions

1. Position the helicopter in a safe location away from main taxiways but with good visibility of airport operations
2. Demonstrate proper checklist usage, explaining that checklists are read and performed, not memorized and rushed through
3. Show how to systematically work through each checklist item while maintaining outside awareness
4. Explain each engine parameter’s normal range and what abnormal indications might suggest
5. Demonstrate proper communication techniques when ATC calls during checklist completion
6. Point out how to verify flight control freedom and proper hydraulic system operation
7. Show how to review takeoff performance charts for current conditions and weight
8. Demonstrate the proper sequence for emergency procedure review
9. Explain how to maintain Nr within acceptable limits during the power checks
10. Show how to position the helicopter for best outside visibility during the check
11. Demonstrate recovery techniques when checklist items reveal abnormalities
12. Review common student errors and their consequences

Student Actions

1. Perform complete before takeoff checklist using proper challenge-response technique
2. Explain the purpose of each checklist item as it is completed
3. Demonstrate ability to pause checklist for traffic or ATC communications
4. Verify all engine parameters are within acceptable limits for takeoff
5. Show proper technique for checking flight control freedom and response
6. Review appropriate emergency procedures for the departure phase
7. Calculate takeoff performance for current helicopter weight and conditions
8. Maintain proper Nr during power verification checks
9. Demonstrate effective attention division between checklist and outside scanning
10. Identify simulated abnormal indications and explain appropriate responses
11. Practice clear communication with ATC while managing checklist completion
12. Complete the entire check within reasonable time limits while maintaining thoroughness

Completion Standards

The student demonstrates satisfactory performance when they can complete the before takeoff check in accordance with FAA-S-ACS-15 PH.II.D by:

1. Completing the appropriate manufacturer’s checklist systematically without omissions or errors
2. Reviewing takeoff performance calculations and emergency procedures appropriate for the departure
3. Verifying that all powerplant temperatures and pressures are within manufacturer’s specified limits for takeoff operations
4. Maintaining Nr within ±3% of normal operating range during all power verification checks
5. Effectively dividing attention between checklist completion and outside traffic scanning with no loss of situational awareness
6. Explaining the specific purpose of at least 80% of checklist items when questioned by the instructor
7. Identifying at least three potential malfunctions that the before takeoff check is designed to detect
8. Demonstrating proper procedures when simulated ATC communications interrupt the checklist sequence
9. Completing the entire before takeoff check within 10 minutes while maintaining thoroughness and safety awareness
10. Taking appropriate action when presented with simulated abnormal engine parameter indications during the check