Draft AC 21-38 v2.0 - electrical load analysis and power source capacity

Closed 15 Aug 2017

Opened 31 Jul 2017

Published responses

View submitted responses where consent has been given to publish the response.


This AC provides guidance material for the preparation of an electrical load analysis. This guidance is appropriate in the absence of information from the type certificate or supplemental type certificate holder.

The AC will be of interest to:

  • Subpart 21.B type certificate holders
  • Subpart 21.E supplemental type certificate holders
  • Subpart 21.J approved design organisations
  • Subpart 21.M authorised persons
  • Part 42 continuing airworthiness management organisations
  • CAR 30 certificate of approval holders.

Why your views matter

We have made substantial amendments to this AC and are seeking feedback from industry and the public before the AC is published.

The content of this AC is designed to assist the creation or alteration of electrical load analysis design under Part 21 of CASR. The corresponding AWB 24-7 on Electrical Load will be amended to suit the content of this AC and provide information for licensed aircraft maintenance engineers to use when conducting testing on aircraft for electrical load analysis.

A copy of the draft advisory circular is provided below. You can read the document on this screen using the scroll bar or save it to your computer using the popup options. Annex A to this AC is available in the 'related documents' section at the end of this page.

Please read the documents before providing your feedback in the online survey.

Your browser does not support inline PDF viewing.Please download the PDF.



  • Air operators
  • Airworthiness organisations
  • Engineers
  • Manufacturers


  • Airworthiness / maintenance
  • Aircraft certification and design