CH.IX.B.R9

From the FAA library

• Helicopter Flying Handbookp. 11-16
  Chapter 11: Helicopter Emergencies and Hazards › Low Rotor RPM and Rotor Stall

  Other causes of a power-on low rotor rpm condition include the pilot rolling the throttle the wrong way in helicopters not equipped with a governor or a governor failure in helicopters so equipped. As the rpm decreases, the amount ... upon itself rapidly leading to rotor stall. There are a number of ways the pilot can recognize the low rotor rpm situation. Visually, the pilot can not only see the rotor rpm indicator decrease but also the change in torque…

• Helicopter Flying Handbookp. 5-6
  Chapter 6: Weight and Balance

  information that might be covered include physiological factors, general weather information, fuel conservation procedures, external load warnings, low rotor rpm considerations, and recommendations that if not adhered to, could lead to an emergency. Chapter Summary This chapter familiarized the reader…

• Helicopter Flying Handbookp. 10-11
  Chapter 10: Advanced Flight Maneuvers › Pinnacle and Ridgeline Operations › Approach and Landing

  If downdrafts are encountered, it may become necessary to make an immediate…

• Helicopter Flying Handbookp. 10-10
  Chapter 10: Advanced Flight Maneuvers › Confined Area Operations › Approach

  confined area operations, with the exception of a pinnacle operation (see next section, Takeoff), the angle of descent should be no steeper than necessary to clear any barrier with the tail rotor in the approach path and still land ... barrier by a few feet and maintaining normal operating rpm, with perhaps a reserve of power, is better than clearing a barrier by a wide margin but with a dangerously low rpm and no power reserve…

• Pilot's Handbook of Aeronautical Knowledgep. 9-10
  Chapter 9: Flight Manuals and Other Documents › Minimum Equipment Lists (MEL) and Operations With Inoperative Equipment

  equipment must be placarded INOPERATIVE. All small rotorcraft, non-turbine powered airplanes, gliders, or lighter-than-air aircraft operated under 14 CFR part 91 are eligible to use the maintenance deferral provisions of 14 CFR, part 91, section ... However, once an operator requests an MEL, and a Letter of Authorization (LOA) is issued by the FAA, then the use of the MEL becomes mandatory for that aircraft. All maintenance deferrals must be accomplished in accordance with the terms…

• Helicopter Flying Handbookp. 5-3
  Chapter 5: Rotorcraft Flight Manual › Operating Limitations (Section 2) › Rotor Limitations

  Altitude Limitations If the rotorcraft has a maximum operating density altitude (see page 7-2), it is indicated in this section of the flight manual. Sometimes the maximum altitude varies based on different gross weights. Rotor Limitations Low rpm does ... produce sufficient lift, and high rpm may cause structural damage, therefore rotor rpm limitations have minimum and maximum values. A green arc depicts the normal operating range with red lines showing the minimum and maximum limits. [Figure 5-3] There…