||Avoid swivel type connectors and fittings for air, fuel, or hydraulic line interfaces due to their history of low reliability.|
||Provide spacing between parallel plumbing runs so that in-line couplings can be replaced without removing lines or disconnecting any line support devices.|
||Ground vehicles with storage bays or compartments accessible from outside the vehicle should:|
- Have the door sill located no lower than knee height to accommodate a wide range of percentiles while standing.
- Ensure door handles are flush with outer surface to protect personnel.
- Contain goose neck hinges to protect the hinge from the elements.
- Contain peripheral door seals that will protect against blowing sand entry at 50 mph.
- Ensure door can be opened with transport tie downs installed.
- Ensure door opening envelope does not intrude into the opening envelope of an adjacent door.
- Contain simple sheet metal hold-open spring or mechanism.
- Ensure floor of bay or compartment is flush with sill to simplify cleanout and drainage.
- Ensure door unlocking and opening mechanism can be actuated by a 95 percentile male hand while wearing arctic gloves.
- Contain 15 percent added volume for density growth.
Ground vehicles with small exterior storage bays or compartments containing emergency equipment or supplies should:
- Be located at chest height of the 50 percentile male.
- Contain unlatching mechanisms activated by pushing inward on the door.
- Meet all other generic bay and compartment requirements.
||Orient all vehicle liquid servicing fittings to ensure fluids will not come in contact with protective garb during connect/disconnect activities.|
||Ensure vehicle overboard passive liquid drains are clearly marked or visible to enable personnel to remain clear of area.|
||Design fuel cell drains so they can not be activated in a manner that would allow fuel to come in contact with a protected hand.|
||Design emergency ingress provisions so they can be activated by a 95 percentile male wearing full protective chemical or biological protection gear.|
||Size rescue doors, panels, and "cut here" areas to accommodate the 95 percentile shoulder width wearing full protective chemical or biological protection gear.|
||Consider the reduction in peripheral vision resulting from wearing chemical or biological protection gear when designing intended fire paths and crash rescue paths into a vehicle.|
||Use fiber-optic technologies in preference to conventional interconnect concepts to reduce the number of interconnects/interfaces, reduce manufacturing and ownership costs, and significantly improve R&M.|
||Standardize connector and wire types to improve testability and logistic support. Keep the number of "different" standard connectors to a minimum. Use the same connector type keyed differently where possible.|
||Provide clearance around connectors for engagement/disengagement of cables and proper connector orientation under anticipated environmental conditions (e.g., bare hand of 50 percentile male in an enclosed or protected environment and a gloved hand of a 50 percentile male in an open or unprotected environment).|
||Use quick release cables and locate cables to make removal and replacement easy and to avoid having to remove one cable to gain access to another. Provide adequate space for cables, including sleeving and tie-downs, and adequate service loops for ease of assembly/disassembly|
||Orient and space connectors to allow a sufficient grip on the connector for cable or wire extraction without fear of using the wiring or cable for additional leverage.|
||Label, and where possible color code, each wire in a harness or cable to facilitate tracking from origin to termination. Each wire, cable, and coax-to-connector interface should be provided with a source of identification to aiding trouble shooting, repair, or modification. Marking the cable designator on the cable along with bar codes is also recommended.|
||Do not manufacture or dress connectors containing more than 25 wires or cables as a single integrated harness. Group the wires or cables into runs of no more than 25 wires or cables each. In addition to making trouble shooting and repair easier, this approach help avoid large bend radii, thereby simplifying routing, packaging, and stowage.|
||Standardize connector pin assignments for power, ground, and other frequently used signals.|
||Locate LRU/subsystem critical nodes (and or test points) so they are accessible from a connector to prevent the need for internal LRU probing or access.|
||Avoid hidden cables. Visually inspecting and tracing all assembly cables rather than having hidden cables (such as behind other cables or even LRUs) allows for a quick system and cable integrity check which aids in overall system integrity and debug. This also implies quick access for manipulative actions.|
||Orient spare wires and cable pigtails along the outer diameter or periphery of connectors to make access easier.|
||Build up and assemble straight and angle connector shells or back shells in a manner that ensures that wire or cable strain or wear is not possible.|
||Design automated systems and programs with provisions to enable "stop test" and "resume" without the need to cycle back or repeat the entire test.|
||In the event of program loss or hang-up, automated systems and programs should have provisions for reverting to manual test and operation.|
||Use a test connector to provide test and maintenance bus access to all system and subsystem faults.|
||Design systems and subsystems so that ATE can be used to access, read, and control internal components in concert with the test or checkout program.|
||Avoid the need for costly adapters for signal communications between system, subsystems, line replaceable units (LRUs) or Weapon Replaceable Assemblies (WRAs), and ATE.|
||Control rods should use Boyd or impedance type bolts (or equivalent) to eliminate the need for cotter pins or safety wire.|
||Do not use metal control cables for vehicles that will operate in salt water or salt air environments.|
||Use control rods rather than control cables for non-complex applications and non-complex routing within the vehicle.|
||Use control cables rather than control rods for most complex applications.|
||Route cables so that 100 percent of a cable will be viewable for inspection.|
||Design all pulleys and brackets associated with cable installations so they are accessible by a 75 percentile male hand.|
||Canopy attachment/hinge hardpoints should be located on the same structural subassembly as the canopy locking hardpoints.|
||Armor protection integrated with the vehicle structure should be given preference over parasitic armor.|
||In rare cases where armor is parasitic, armor should be interchangeable and easily installed.|
||Avoid wiring, coax, and plumbing penetrations through the floor of crew cabs, operators' compartments, crew stations, cockpits, and passenger compartments.|
||Structural instrument panels, dashboards, and control panels should be modularized for easy and adequate access to all interfaces, to simplify manufacturing, and to reduce maintenance-induced problems.|
||Film magazines, tapes, and removable modules should permit considerable handling without reliance on special support equipment protection.|
||Electronic and photosensitive storage media should withstand the adverse environment created by ground, flightline, or shipboard electromagnetic fields and light sources.|
||Data storage media containers and modules should be capable of chemical and biological decontamination processes.|
||Crew and operator station cassettes or magazines should be capable of being removed and installed with one hand while the operator or air crew is seated and strapped in.|
||Design cameras, recorders, and sensors to be fully interchangeable and quickly replaceable.|
||Design cameras, lenses, reconnaissance pods, aiming devices, and related equipment so they can be reconfigured by one individual.|
||Requirements for boresighting should not be part of the design or integration.|
||Provide storage provisions in each vehicle type (ground and airborne) to store extra tapes, modules, canisters, cassettes, as appropriate to the intended vehicle use/mission.|