In satisfying airworthiness regulations of USA FAA (Federal Aviation Administration), Maintenence Data Computer (MDC) software is developed, verified and certified according to RTCA/DO-178B standard Level C, as part of the Sikorsky S-92 Helicopter Type Certification (TC).
The MDC is a component of the Maintenance Data Reporting System (MDRS) that performs aircraft system health, status determination, and reporting functions utilizing data acquired from aircraft sensors or the Avionics Management System (AMS92) and displaying that information to the flight or maintenance crew. The MDC receives data from several avionics systems via ARINC 429 buses. The MDC interfaces analog and discrete aircraft system data directly through its input signal interface hardware. MDC records and displays fault, status and warning information at SRU/LRU/Subsystem/System level on allocated Multifunctional Display (MFD) pages via ARINC 429 buses. The MDC also provides limited analog outputs for initiation of Built-In-Test (BIT) by other aircraft systems and subsystems. MDC sofrware is a real time, embedded application developed by using ADA83 programming language.