Embedded Computer Systems: Status of C-17 Software
Abstract
The C-17 will be the most computerized, software-intensive, transport aircraft ever built. Embedded computers are essential for the C-17 to accomplish its mission--the aircraft depends on these computers to control basic avionics functions such as flight control, communication, and instrument displays. The C- 17 relies on 19 different types of embedded computers incorporating over 80 microprocessors and about 1.3 million lines of code. This statement provides information on the current status of embedded computer and software development for the C-17. In summary, we have observed a pattern of the Air Force continuing to permit its prime contractor, McDonnell Douglas Corporation, to defer software development to future aircraft. Originally, the first aircraft (T-1), delivered in September 1991, was supposed to include all the software. But, McDonnell was unable to develop and deliver the software on time. Rather than slowing aircraft production until the software could be completed, McDonnell deferred software development, initially to the P-2 aircraft, then to the P-5 aircraft, and now to the P-6 and future aircraft. Each software development deferral further delays the Air Force's ability to fully test the software and demonstrate that the C-17 can meet all of its requirements.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 18, 1993
- Accession Number
- ADA267307
Entities
Organizations
- United States Government Accountability Office