According to Master Parachute Rigger, Marcelo Garcia:
“Only a rigger can assemble an AAD, and only a Master Rigger can ‘install’.
The difference in the two words is critical:
assembly means the unit is placed in the existing pouch and channels already in the container
installation means the master rigger is actually sewing the pouch and channels in order to assemble an AAD,
so in a sense it is an alteration to the current configuration, pretty rare these days as all units come AAD ready from factory.
AAD is not mandatory, in fact AAD’s are not certificated component and the only thing the FAA can do about them is require the use and maintenance be in accordance to the manufacturer’s instructions.”
“Only a rigger can assemble an AAD, and only a Master Rigger can ‘install’.”