MIL-DTL-83495C (USAF)
t. If the Fault Isolation manual will duplicate the Fault Reporting Log Book (see 3.5.5.3).
u. If the Wiring Data manual will be prepared in single manual format or separate manuals
by system (see 3.6).
v. If the WD manual will be combined with the SD manual (see 3.6).
w. If the Schematic Diagram manual will be prepared in single manual format or separate manuals
by system (see 3.7).
x. If the Schematic Diagram manual will be independent, combined with the General Systems
manual(s), or combined with the Wiring Data manual(s) (see 3.7).
y. Packaging requirements will be as speciied in 5.1.
6.3 Technical manuals. The requirement for technical manuals should be considered when this speciication
is applied on a contract. If technical manuals are required, speciications and standards that have been
authorized and assigned an Acquisition Management Systems Control (AMSC) number must be listed on a
separate Contract Data Requirements List (DD Form 1423), which is included as an exhibit to the contract.
The technical manuals must be acquired under separate contract line item in the contract."
6.4 Deinitions.
6.4.1 Component. A unit, consisting of accessories that collectively perform a speciic functional operation,
which is normally removed and replaced as a single item. Examples are engines, guidance and control
packages, gearboxes, hydroelectric-mechanical actuators, servos, receivers, transmitters, motors, etc.
6.4.2 Consumable materials. Sealants, lubricants, gaskets, seals, cleaning solvents, paint, etc., are
considered consumable items.
6.4.3 Faults.
6.4.3.1 Basic fault. A "basic fault" requires additional diagnostics to complete.
6.4.3.2 Subfault. Completion of the basic fault analysis results in a "sub fault". Subfault analysis
completes the isolation process.
6.4.3.3 Single entry fault. Fault isolation that terminates the analysis process without generating a subfault.
6.4.4 Follow-on maintenance. A maintenance action required upon completion of a function or task,
to return the equipment to operation.
6.4.5 Higher level designator (HLD). An enhanced reference designation indicator (RDI) identiication
code assigned by the contractor and given to all LRUs and SRUs. HLDs are assigned according to the
requirements of MIL-HDBK-863. and DOD-STD-1808. The code relects the functional system, subsystem,
sub-subsystem, equipment class letter(s), as sequentially assigned number, and a sufix letter, when required.
For example: An HLD for a light station temperature control relay could be 2161K003 (21-air conditioning
system, 6...-temp control subsystem, ...1-light station subsubsystem, K-relay, 003-third relay on the drawing).
6.4.6 Line replaceable unit (LRU). An LRU is a unit which can be removed from a system and replaced
with a like operating unit, in order to restore the operational capability of the next higher system.
6.4.7 Maintenance procedure. This type of procedure is speciic in nature and is performed on the vehicles
systems, components, LRUs, and SRUs. Systems 18 and 21 through 99 normally contain functional
maintenance procedures. A typical functional maintenance procedure includes:
1. Input condition page for each function (remove, install, etc.)
a. Task or series of tasks
1) Steps with illustrations
6.4.8 Maintenance function. A task or series of related maintenance tasks performed upon installed
equipment or component. Examples of maintenance functions include: removal, installation, adjustment,
calibration, component checkout, cleaning, etc.
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