There is a lot more out there.
My day job is working at an avionics engineer for an airline. It pays for my 100LL habit. At an airline, the Engineering department is primarily responsible for configuration control of the aircraft. I was an airline A&P before I got my bachelors in electrical engineering. I don't design anything. We aren't trying to be super mechanics, despite the impression mechanics have. We have them for the mechanical work. I work in a 24x7 maintenance support center. From where I sit I can read almost everything that's recorded about the Mx on a fleet of about 400 airliners world wide.
When you work for a properly funded engineering group, typically the company pays for access to specification databases. We use Information Handling Systems (IHS). They provides us an online library of specifications which also includes an e-book library with hundreds of design text books on titles you really don't find anywhere else. Seriously, where else would you find a downloadable copy of. "Aviation weather surveillance systems - advanced radar and surface sensors for flight safety and air traffic management"?
In addition, when the airline is a member of ARINC and RTCA, you have access to all of their specs too. When you operate Boeing and Airbus aircraft, you also have access to limited specifications, drawings and their customer specific data too. There are Non-disclosure agreements in place that prevent me from sharing most of that info.
RTCA specs affect everyone trying to get a TSO. ARINC members are airliner OEMs and operators. GAMA represents GA on new aircraft.
For GA there are GAMA standards and honestly, when there is overlap, I can't tell you how an ARINC 429 data bus differs from a GAMA 429 data bus. It could be relevant though.
See ->
https://gama.aero/facts-and-statist...ry-technical-publications-and-specifications/
When I bought an airplane, it was a mess electrically, despite the fact that the paperwork looked in order. When I decided to fix it all, I started looking for design references. I found surprisingly little outside of the 43-13 Advisory Circulars and they are really limited.
I also belong to a social networking group somewhat like POA for engineers. Like POA, anyone can read the information posted, they would rather not have any non-engineers posting questions.
See->
https://www.eng-tips.com/
Over the years I've posted questions about circuit breakers, aircraft wiring questions, splice reliability questions etc. One of the folks in there is an aerospace designer that's been active for a lot of years, I'm not sure if he works on the military or civilian side.
He shared the following list of documents to look at with regard to circuit breakers, if you are interested. Installed circuit breakers look simple, but a lot has been written about them with regard to aircraft over the years.
Here is his somewhat dated list. It's probably incomplete.
FAA AC25.13567-1 Circuit protective devices.
FAA AC25-16 Electrical Fault and Fire Prevention and Protection
FAA AC43-206 Inspection, Prevention, Control, and Repair of Corrosion on Avionics Equipment
SAE ARP1199, DEVICES, ELECTRIC OVERCURRENT PROTECTIVE, SELECTION, APPLICATIONS, AND INSPECTION OF
SAE ARP4101/5 Aircraft Circuit Breaker and Fuse Arrangement
SAE ARP4404 Aircraft Electrical Installations
SAE AS50881 WIRING, AEROSPACE VEHICLE
SAE AS58091 Circuit Breakers, Trip-Free, Aircraft General Specification For
SAE J553 Circuit Breakers
SAE/TP 2006-01-2419 Arc Fault Protection, Application Techniques for Aircraft Circuit Breakers
MIL-DTL-27715 CIRCUIT BREAKER, TRIP-FREE, HIGH TEMPERATURE, AIRCRAFT GENERAL SPECIFICATION FOR
MIL-DTL-23928 PANELS, ELECTRICAL, POWER DISTRIBUTION AND MANUAL TRANSFER, CIRCUIT BREAKER TYPE
MIL-HDBK-522 GUIDELINES FOR INSPECTION OF AIRCRAFT ELECTRICAL WIRING INTERCONNECT SYSTEMS
MIL-HDBK-5400 ELECTRONIC EQUIPMENT, AIRBORNE GENERAL GUIDELINES FOR
MIL-STD-7080 SELECTION AND INSTALLATION OF AIRCRAFT ELECTRIC EQUIPMENT
WRDC-TR-90-4075 FAILURE ANALYSIS TECHNIQUES FOR THE EVALUATION OF ELECTRICAL AND ELECTRONIC COMPONENTS IN AIRCRAFT ACCIDENT INVESTIGATIONS
WL-TR-95-4004 AIRCRAFT MISHAP INVESTIGATION HANDBOOK FOR ELECTRONIC HARDWARE
DOT/FAA/AR-01/118 Aircraft Age-Related Degradation Study on Single- and Three-Phase Circuit Breakers
USAF T.O. 1-1-686-1, CLEANING AND CORROSION CONTROL VOLUME I CORROSION PROGRAM AND CORROSION THEORY
USAF T.O. 1-1-686-3, CLEANING AND CORROSION CONTROL VOLUME III AVIONICS AND ELECTRONICS
USAF T.O. 1-1-686-5, CLEANING AND CORROSION CONTROL VOLUME V CONSUMABLE MATERIALS AND EQUIPMENT FOR AVIONICS
USAF T.O. 1-1A-14 INSTALLATION AND REPAIR PRACTICES VOLUME 1 AIRCRAFT ELECTRIC AND ELECTRONIC WIRING
There are other specifications bodies out there. The FAA has been using American Society for Testing and Materials (ASTM) to define the requirements for a lot of the small aircraft Part 23 requirements. See ->
https://www.faa.gov/aircraft/air_ce...es/small_airplanes_regs/media/part_23_moc.pdf
In one of the most depressing EAA meetings I went to, 5-6 years ago, the FAA rep was talking about ASTM specs now being the standard. He didn't even know what ASTM stood for or who they were.
I don't have these at work, I did buy one ASTM - F2490 - 20 to see what a real Electrical Load Analysis for a GA airplane should look like. The comment, "Electrical Load Analysis within limits." on the 337s for my airplane looked good to someone but, were meaningless.
Hope this helps put it in perspective.