What is AC 21-99 and Why You Need It for Aircraft Wiring and Bonding
This Australian CASA advisory circular (AC 21-99) is set up similarly to FAA AC 43.13 1B/2B describing acceptable standards for the inspection, installation and repair, specifically for aircraft electrical systems.
Daily maximum and minimum ambient temperatures were obtained from HadUK-Grid Gridded Climate Observation (v1.0.0.0) [50] on 1 km grid and downloaded from the Centre for Environmental Data Analysis [67]. The data in each of the four cities and three regions were cropped with the digital boundaries of the local authorities obtained from EDINA Digimap Service (the data in the four cities were excluded from the three regions) and area-level mean daily maximum and minimum temperatures were calculated. The daily mean temperature of each locality was taken as the average of the area-level mean daily maximum and minimum temperature.
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