Cylinder barrel temperatures must be corrected by adding to them 0.7 times the difference between the maximum ambient atmospheric temperature for the relevant altitude for which approval has been requested and the temperature of the ambient air at the time of the first occurrence of the maximum cylinder barrel temperature recorded during the cooling test. (Change 523-5) 523.1045 Cooling Test Procedures for Turbine Engine Powered Aeroplanes (a) Compliance with 523.1041 must be shown for all phases of operation.
A single rear position light may be installed in a position displaced laterally from the plane of symmetry of an aeroplane if: (1) The axis of the maximum cone of illumination is parallel to the flight path in level flight; and (2) There is no obstruction aft of the light and between planes 70° to the right and left of the axis of maximum illumination.