The Engineering module is introduced for aircraft and engines to monitor compliance with aviation regulations, Service Bulletins and Engineering Orders.
This module qualifies with "continued airworthiness" requirements. You could also use this module to include the Manufacturer options (and pricing) and monitor the aircraft configurations in this way.

Requirements of regulatory authorities (FAA/JAR, EASA/JAR, UK CAA, etc.) will be shown under the individual aircraft/engine/APU serial number and the compliance status can be included.

AD, SB, EO etc compliance status reports can be produced.