RELIABILITY ANALYSIS OF THE SYSTEM MAINTENANCE MONITOR CONSOLE
The specification for the system maintenance monitor console (SMMC) calls for a minimum mean uptime (MUT) of 5,000 hours and a maximum mean downtime (MDT) of 1 hour for each SMMC module type. Formal MUT and MDT tests were performed in accordance with approved test plans. A major cause of concern has been the high replacement rate and limited availability of the type 247 subminiature lamps used in the projection readout indicators (PRI's). Detailed replacement studies of these lamp failures brought out that an average of two lamps per day per SMMC failed. Comparative life tests were performed between the type 247 and three alternative type lamps, types 6180, 714, and 685. Types 714 and 685 showed significantly greater mean lives but lower luminosities than the 247. Human factors studies are being planned to determine the suitability of using lamps of lower luminosity.
NATIONAL AVIATION FACILITIES EXPERIMENTAL CENTERATLANTIC CITY, NJ United States
Federal Aviation Administration800 Independence Avenue, SW
Washington, DC United States 20591
- Moss, A R
- Publication Date: 1975-3
- Pagination: 85 p.
- TRT Terms: Air traffic control; Consoles; Electrical equipment; Lamps; Maintainability; Maintenance equipment; Monitoring; Reliability
- Uncontrolled Terms: Monitors
- Old TRIS Terms: Indicators; Subminiature electrical equipment
- Subject Areas: Operations and Traffic Management; Vehicles and Equipment;
- Accession Number: 00090506
- Record Type: Publication
- Source Agency: National Technical Information Service
- Report/Paper Numbers: FAA-NA-74-53 Final Rpt.
- Files: NTIS, USDOT
- Created Date: May 29 1975 12:00AM