TM 1-4920-445-13&P
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INTRODUCTION CONTINUED
Explanations of Entries in the MAC
Columns (1) - Group Number and (2) Component/Assembly. The functional groupings in the sample below iden-
tify maintenance signiicant components, assemblies, subassemblies, and modules with the next higher assem-
bly.
Group Number
Component/Assembly Description
04
POWER PLANT
0401
ENGINE, GENERAL
Servicing, handling inspection requirements, overhaul and retirement
schedules. External lines and hoses. (As applicable)
0402
COMPRESSOR SECTION (COLD SECTION MODULE)
Rotor, blades, vanes, impeller, stators, inlet guide vanes, mainframe,
particle separator, bleed valve, bearings, seals, external lines, and hoses.
0403
COMBUSTION SECTION (HOT SECTION MODULE)
Liners, nozzles, stators, rotor, seals, couplings, blades.
0404
POWER-TURBINE (POWER TURBINE MODULE)
Nozzles, rotors, blades, exit guide vanes, exhaust frame, drive shaft,
bearings, seals, external lines, and hoses.
0405
ACCESSORY GEAR BOX (ACCESSORY SECTION MODULE)
Input and output gears, seals, chip detector, housings, drive shaft, and
bearings.)
0406
FUEL SYSTEM
Fuel control, fuel boost pump, governors, fuel ilter assembly, sequence
valve, fuel manifold, fuel nozzle, external lines, and hoses.
0407
ELECTRICAL SYSTEM
Electrical control units, exciters, thermocouples, ignition harness, electrical
cables, history record, torque over speed sensor, Np sensor, external lines,
and hoses.
0408
OIL SYSTEM
Tanks, oil ilter, oil cooler, lube and scavenger pumps, oil ilter bypass
sensor, external lines, and hoses.
Column (3) - Maintenance Function. Column (3) list the functions to be performed on the items listed in Compo-
nent/Assembly.
Column (4) - Maintenance Level. The maintenance levels ield and sustainment are listed on the MAC with indi-
vidual columns for AMC, ASB, TASMG, and Depot that include the work times for maintenance functions at each
maintenance level. Work time presentations such as "0.1" indicate the average time (expressed in man-hours in
whole hours or decimals) it requires a maintenance level to perform a speciied maintenance function. If a work
time has not been established, the columnar presentation will indicate" --". Maintenance levels higher than the
level of maintenance indicated are authorized to perform the indicated function.
Column (5) - Tools and Equipment Reference Code. Column (5) speciies, by code, those common tool sets (not
individual tools), common TMDE, and special tools, special TMDE, and special support equipment required to
perform the designated function.
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