Reliability and Maintainability Evaluation of the Tower Cab Digital Display System.

Abstract

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)

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1980
Accession Number
ADA094079

Entities

People

  • Arthur R. Moss
  • George C. Apostolakis

Organizations

  • Federal Aviation Administration

Tags

Communities of Interest

  • Human Systems

DTIC Thesaurus Topics

  • Air Force
  • Air Force Facilities
  • Air Traffic
  • Circuit Boards
  • Control Panels
  • Display Systems
  • Failure Mode And Effect Analysis
  • Keyboards
  • Maintenance
  • Power Supplies
  • Preventive Maintenance
  • Printed Circuit Boards
  • Printed Circuits
  • Reliability
  • Telephone Lines
  • Time Intervals
  • United States

Readers

  • Aviation Safety and Air Traffic Management
  • Inertial Navigation Systems.
  • Mathematics or Statistics