Downloaded from https://www.everyspec.com MIL-STD-1808C w/CHANGE 1 SYSTEM SUB-SYSTEM TITLE DEFINITION 72 (1) ENGINE: TUR- BINE/TURBOPROP 00 GENERAL The portion of the system that covers general information, limits, and procedures. 10 REDUCTION GEAR AND SHAFT SECTION (TURBOPROP) The portion of the system that contains the propeller shafts and reduction gears. Includes drives for nose mounted accessories, etc. 20 AIR INLET SECTION The portion of the system through which the air enters the compressor section. Includes guide vanes, shrouds, cases, etc. 30 COMPRESSOR SECTION The portion of the system where air is compressed. Includes cases, vanes, shrouds, rotors, diffusers, etc.
Also includes maintenance of stator blades, but not the operation of variable stator blades (see System 75, AIR). Does not include compressor bleed system. 40 COMBUSTION SECTION The portion of the system where air and fuel are combined and burned. Includes burner cans, cases, etc. 50 TURBINE SECTION The portion of the system containing the turbines. Includes turbine nozzles, turbine rotors, cases, etc. 60 ACCESSORY SECTION The portion of the system covering mechanical power takeoffs to drive accessories. Includes engine mounted gearboxes, gears, seals, pumps, etc. Does not include remotely installed gearboxes (see System 83, ACCESSORY GEARBOXES).
70 BYPASS SECTION The portion of the system that bypasses a portion of the normal engine airflow (either ram or compressed air) for the prime purpose of adding to engine thrust or reducing specific fuel consumption. 82