A reliability and maintainability evaluation was performed on eight Tower Cab Digital Display (TCDD) systems located at four Florida air traffic control (ATC) facilities. Data were collected between August 25, 1979, and February 29, 1980. Analysis of these data showed that 21 chargeable hardware failures occurred (excluding the telephone lines). This corresponds to an overall system mean-time-between-failures (MTBF) of 1,001 hours and a mean-time-to-repair (MTTR) of 2.9 hours. In addition to the chargeable hardware failures, many system outages which could be attributed to transitory, environmental, or undefined causes occurred. These outages included noisy telephone lines, frequent automatic restarts, and high ambient room temperatures. The measured MTBF for a subset of the system was found to be lower than the corresponding predicted value. The 2.9-hour measured MTTR is considered excessive. Recommended actions for several design changes are included. (Author)

  • Corporate Authors:

    Federal Aviation Administration

    William J. Hughes Technical Center, Airport Technology Research and Development Branch
    Atlantic City International Airport
    Atlantic City, NJ  United States  08405

    Federal Aviation Administration

    800 Independence Avenue, SW
    Washington, DC  United States  20591
  • Authors:
    • Moss, A R
    • Apostolakis, G C
  • Publication Date: 1980-12

Media Info

  • Pagination: 48 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00328879
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: FAA-CT-80-32, FAA-RD-80-104
  • Files: NTIS, USDOT
  • Created Date: May 21 2003 12:00AM