Specifications

MIL-sTD-1472E
5.9 Design for maintainer.
5.9.1 General.
5.9.1.1 Standardization. Standard parts SIMMbe used whenever practicable and should meet the
human engineering criteria herein.
5.9.1.2 Special tools. Special tools shall be used oniy when common hand tools cannot be
used, when they provide significant advantage over common hand tools, or where required by security
considerations. Special tools required for operational adjustment maintenance should be securely
mounted within the quipment in a readily accessible lmation.
5.9.1.3 Modtdarm
tdacaent. Equipment should be replaceable as modukr packages and shall
be coti]gured for removal and replacement by one person where permitted by structural, functional,
and weight limitations. (See 5.9. 11.3.)
5.9.1.4
SeDarate adiustabiiity, It shall ‘bepossible to check and adjust each item, or function of
an item, individually.
5.9.1.5 Malfunction identification. Equipment design shall facilitate rapid and posi[ive fault
detection and isolation of defective items to pen-nit their prompt removal and replacement.
5.9.1.6 Assembly and disassembly. Equipment shall be capable of behg assembled and
disassembled in its operational environment by a minimum number of trained personnel wearing
clothing appropriate to the operating environment sptxifkd for the system maintenance
concepL
5.9.1.7 Clothinuconstraints. Equipmentshall be capabk of beingrcmove4 replaced, and
repaid by personnel wearing personal and special purpose clothing and equipment appropriate to the
maintenance concept, including NBC protective clothing in an NBC contaminated environment.
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r- roof desi n. Improper mounting and installation (including interchange of items
of a same or smular orm that are not in fact fimctional.!yintuclutrqpbk) shall be prevented by
physical measures to (a) facilitate identification and interchange of interchangeable items (e.g.,
coding), (b) ensure proper mounting of items (e.g., alignment devices ), and (c) include cables and
connectom in identification, orientation, and alignment
provisions.
5.9.2 Mountimzof items within units.
5.9.2.1 Stackirw avoidance. Patts should be mounted in an orderly array on a “two-
dimensional” surface, rather thar, stacked (i.e., a lower layer should not support an upper layer, so
subassemblies do not have to be removed to access other subassemblies within the equipment.
5.9.2.2 Similar -. S&a& A shall* a common mounting design and orientation
within the unit. This mounting design shall preclude interchange of items which are not functionally
interchangeable. Similar items which ate not functionally interchangeable shall be made
distinguishable by labeling, color coding, Or marking to prevent unwanted substitution.
5.9.2.3 Delicate iterm. Components susceptible to maintenance-induced damage e.g., rough
handling, static eiectncity, abrasion,
cmbminatim) shall be ckarly identified and guarded from abuse
both physically and proccduralty.
5,93 Acllustment controls. controls required for maintenance purpcma
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5.5.
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