Downloaded from https://www.everyspec.com MIL-STD-1808B SYSTEM SUB-SYSTEM TITLE DEFINITION 71 POWER PLANT The subsystem components included in the overall power package. Include engine air intake, mount, cowling, scoops, cowl flaps, etc. 00 GENERAL The portion of the system that includes general information, limits, and procedures. This subsystem covers engine changes, run-up, externally mounted spare power plants, etc. 10 COWLING The portion of the system that includes removable coverings that extend over and around the power plant assembly. Includes the functioning and maintenance aspects of accessory section cowls, cowl flaps, cowling supports, attach and locking mechanisms, etc.
Does not include the structure integral with the airframe (see System 54, NACELLES/ PYLONS). 20 MOUNTS The portion of the system that covers the framework, either of buildup construction or forgings, that supports the engine and attaches it to the nacelle or pylon. Includes engine mounts, vibration dampeners, support links, mounting bolts, etc. 30 FIRESEALS The portion of the system used to isolate areas subject to fire. Includes fire resistant partitions and seals mounted on or about the power package. Does not include firewalls (see System 54, NACELLES/PYLONS).
40 ATTACH FITTINGS The portion of the system covering fittings and brackets used for the support of equipment in and about the power package. 50 ELECTRICAL HARNESS The portion of the system covering electrical cables, conduits, plugs, sockets, etc., that serve several power plant systems, are banded together to facilitate removal, and installation of the power plant. Does not include wiring covered under another system. 60 AIR INTAKES The portion of the system that directs and may vary the mass air flow to the engine.
Includes nose ring cowls, scoops, compressor fan cowls, buried engine ducts, vortex generators, actuators, control handles, cables, wiring, plumbing, linkages, doors, warning systems, position indicators, etc. Does not include integral airframe structure (see System 54, NACELLES/PYLONS). 70 ENGINE DRAINS The portion of the system that drain off excess fluids from the power plant and its accessories. Includes drain lines, manifolds, tanks, flame arresters, vents, and supporting brackets, etc. Also includes components that are an integral part of, or fitted to, the power plant cowling. 76