Downloaded from https://www.everyspec.com MIL-STD-1808C w/CHANGE 1 SYSTEM SUB-SYSTEM TITLE DEFINITION 77 ENGINE INDICATING The subsystem components and associated systems that indicate engine operation. Includes indicators, transmitters, analyzers, etc. For turboprop engines, includes phase detectors. Does not include systems or items specifically included in other systems except when indication is accomplished as a part of an integrated engine instrument system (see Subsystem 40, INTEGRATED ENGINE INSTRUMENT SYSTEMS). 00 GENERAL 10 POWER The portion of the system that directly or indirectly indicates power or thrust.
Includes Brake Mean Effective Pressure (BMEP), pressure ratio, Revolutions Per Minute (RPM), etc. 20 TEMPERATURE The portion of the system that indicates temperatures in the engine. Includes cylinder head, exhaust (turbine inlet), etc. 30 ANALYZERS The portion of the system used to analyze engine performance or condition by means of instruments or devices, such as oscilloscopes. Includes generators, wiring, amplifiers, oscilloscopes, etc. 40 INTEGRATED ENGINE INSTRUMENT SYSTEMS The portion of the system that, in an integrated concept, receives several or all engine operating parameters and transmits them to a central processor for presentation to the flight crew.
Includes display units, transmitters, receivers, computers, etc. 50 ENGINE MONITORING SYSTEM The portion of the system that monitors engine operation, issues flight crew warnings on predetermined malfunctions, and stores engine information for later use by maintenance personnel. 88