spaschal on DSK3GDR082PROD with CFR Section 1.1 14 CFR Ch. I (1-1-19 Edition) Mach number means the ratio of true airspeed to the speed of sound. Main rotor means the rotor that supplies the principal lift to a rotorcraft. Maintenance means inspection, overhaul, repair, preservation, and the replacement of parts, but excludes preventive maintenance. Major alteration means an alteration not listed in the aircraft, aircraft engine, or propeller specifications - (1) That might appreciably affect weight, balance, structural strength, performance, powerplant operation, flight characteristics, or other qualities affecting airworthiness; or (2) That is not done according to accepted practices or cannot be done by elementary operations. Major repair means a repair: (1) That, if improperly done, might appreciably affect weight, balance, structural strength, performance, powerplant operation, flight characteristics, or other qualities affecting airworthiness; or (2) That is not done according to accepted practices or cannot be done by elementary operations. Manifold pressure means absolute pressure as measured at the appropriate point in the induction system and usually expressed in inches of mercury. Maximum engine overtorque, as it applies to turbopropeller and turboshaft engines incorporating free power turbines for all ratings except one engine inoperative (OEI) ratings of two minutes or less, means the maximum torque of the free power turbine rotor assembly, the inadvertent occurrence of which, for periods of up to 20 seconds, will not require rejection of the engine from service, or any maintenance action other than to correct the cause.Maximum speed for stability characteristics, VFC/MFC means a speed that may not be less than a speed midway between maximum operating limit speed (VMO/MMO) and demonstrated flight diving speed (VDF/MDF), except that, for altitudes where the Mach number is the limiting factor, MFC need not exceed the Mach number at which effective speed warning occurs. Medical certificate means acceptable evidence of physical fitness on a form prescribed by the Administrator. under standard atmospheric conditions at sea level. (3) A maximum never-exceed speed (VNE) of not more than 120 knots CAS for a glider. (4) A maximum stalling speed or minimum steady flight speed without the use of lift-enhancing devices (VS1) of not more than 45 knots CAS at the aircraft-s maximum certificated takeoff weight and most critical center of gravity. (5) A maximum seating capacity of no more than two persons, including the pilot. (6) A single, reciprocating engine, if powered. (7) A fixed or ground-adjustable propeller if a powered aircraft other than a powered glider. (8) A fixed or feathering propeller system if a powered glider. (9) A fixed-pitch, semi-rigid, teetering, two-blade rotor system, if a gyroplane. (10) A nonpressurized cabin, if equipped with a cabin. (11) Fixed landing gear, except for an aircraft intended for operation on water or a glider. (12) Fixed or retractable landing gear, or a hull, for an aircraft intended for operation on water. (13) Fixed or retractable landing gear for a glider. Lighter-than-air aircraft means aircraft that can rise and remain suspended by using contained gas weighing less than the air that is displaced by the gas. Load factor means the ratio of a specified load to the total weight of the aircraft. The specified load is expressed in terms of any of the following: aerodynamic forces, inertia forces, or ground or water reactions. Long-range communication system (LRCS). A system that uses satellite relay, data link, high frequency, or another approved communication system which extends beyond line of sight. Long-range navigation system (LRNS). An electronic navigation unit that is approved for use under instrument flight rules as a primary means of navigation, and has at least one source of navigational input, such as inertial navigation system or global positioning system. 12 VerDate Sep<11>2014 12:50 Apr 30, 2019 Jkt 247046 PO 00000 Frm 00022 Fmt 8010 Sfmt 8010 Y:\SGML\247046.XXX 247046