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  • Chapter 14: Airport Operations › Collision Avoidance › Pilot Deviations (PDs)

    Pilot Deviations (PDs) A pilot deviation (PD) is an action of a pilot that violates any Federal Aviation Regulation. While PDs should be avoided, the regulations do authorize deviations from a clearance in response to a traffic alert and collision ... avoidance system resolution advisory. You must notify ATC as soon as possible following a deviation. Pilot deviations can occur in several different ways. Airborne deviations result when a pilot strays from an assigned heading or altitude or from an instrument…

  • 14 CFR § 91.326 Exception to operating certain aircraft for the purposes of flight training, flightcrew member checking, or flightcrew member testing.

    category aircraft, experimental aircraft, or primary category aircraft to conduct flight training, checking, or testing without a letter of deviation authority if no person provides and no person receives compensation for the flight training, checking, or testing ... aircraft. (d) Previously issued letters of deviation authority. For deviation authority issued under § 91.319 prior to December 2, 2024, the following requirements apply— (1) The deviation holder may continue to operate under the letter of deviation authority until December…

  • Chapter 5: Flight Instruments › Dynamic Pressure Type Instruments › Magnetic Compass Errors

    Figure 5-19. A compass correction card shows the deviation correction for any heading. The corrections for variation and deviation must be applied in the correct sequence as shown below starting from the true course desired. Step 1: Determine ... Course True Course (180°) ± Variation (+10°) = Magnetic Course (190°) The Magnetic Course (190°) is steered if there is no deviation error to be applied. The compass card must now be considered for the compass course of 190°. Step 2: Determine…