Getting into the hot weather down here so time to consider this again. (I only deal with small airplanes.)
Originally Posted by
andrewr
Presumably where-ever you are supposed to get the temperature from for your performance calculations.... possibly even declared density?
CAO 20.7.4
Aeroplane weight and performance limitations aeroplanes not above 5 700 kg private, aerial work (excluding agricultural) and charter operations states "Approved declared conditions may be used instead of actual pressure height and temperature" - the declared conditions are from CAO 20.7.0 as declared density altitude.
A couple of years ago, a note in the Exposure Draft of Part 91 (MOS for 91.1035 Aircraft Performance): It is the intention that CAOs 20.7.4.
. will be subject of a project to review them and provide guidance material in the form of an AC in the future. Much of the content of the CAOs contain either certification standards or outdated information. CASA expects pilots to operate in accordance with the aircraft flight manual (AFM). All performance information in the AFM is produced and complies with the aeroplane certification standards.
I've heard nought of that project since.
If one has a FAR 23 airplane not more than 6,000 lb maximum weight there are no performance weight limitations in the AFM so just work your way through CAO 20.7.4 and try to deal with the outdated information and Australian-specific certification standards within it.