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Required and recommended airspeeds (and the configuration of the airplane for which the airspeeds apply) deemed likely to enhance safety of operation during an emergency shall be listed at the beginning of this Section or in the Emergency Procedures Check List.
Circle-to-land maneuver is the maneuver made by the pilot to align the aircraft with the landing runway when a linear instrument approach is not possible or required. At tower control airports, air traffic control clearance must be obtained and a visual reference of the airport must be established before such maneuvers can be performed.
The yaw damper works by sensing any yaw motion and then applying corrective inputs to the aircraft＇s rudder to reduce or eliminate any unwanted yawing. It is particularly useful in minimizing the effects of turbulence or other external disturbances that can cause yawing and make the aircraft harder to control. The yaw damper is an important safety feature that helps to improve the overall stability and control of the aircraft, especially during critical phases of flight such as takeoff and landing.
Pressure Altitude refers to altitude measured from standard sea level pressure (29.92 in. hg.) by a pressure or barometric altimeter. It is the indicated pressure altitude corrected for position and instrument error. In this Handbook, altimeter instrument errors are assumed to be zero.
In cases where an item has an exceptionally high degree of complexity requiring specialized techniques, test equipment, or expertise, it is not required that internal diagrams and construction details, or data in interconnect systems, maintenance, troubleshooting, inspection or repair, will be included in the basic airframe Maintenance Manual on major components such as avionics, specialty electronics, engines and propellers.
Deactivation/Reactivation procedures for circuits, systems, units, etc., shall be included. This is important because during maintenance, certain components may need to be deactivated for safety reasons or to prevent damage to the aircraft or equipment. It is also important to have instructions for reactivating these components once maintenance is complete to ensure that they are functioning properly and do not pose a risk to the safety of the aircraft or its occupants.
The recommended fuel conservation procedures shall contain a caution, if applicable, that the power settings recommended by the manufacturer must be used during the break-in period of new and newly overhauled engines. The use of economy power settings during this period may be detrimental to the engine life.
The schematic diagrams should include generators, tanks, and reservoirs that are considered to be the starting points of the flow shown. The diagram shall be arranged so that the flow of the system can be traced with a minimum of effort. Cross-overs shall be avoided as much as possible.
That portion of the system which is used to extend and retract the landing gear and open and close the landing gear doors. Includes items such as actuating mechanisms, bogie trim, bungees, up and down latches, operating controls, valves and motors, cables, plumbing, etc.
Some types of airplanes (e. g., turbopropeller powered) may have VMCA determined with automatic propeller pitch control devices that may have substantially more drag from an engine operating at reduced power, to simulate an engine failure, than with an inoperative engine.
