MIL-DTL-9129G
3.6.7 Lightning transfer. Dischargers are to be tested for lightning transfer characteristics between the discharger
holder section and a simulated aircraft skin (see 4.6.5). RTCA/DO-160G Section 23, zone 2A will be used. The
current will be passed through the discharger holder and into the simulated skin. After the passing of the above
current, the discharger and holder assembly (if applicable) shall remain intact (see 4.6.5).
3.6.8 Vibration. Dischargers shall be capable of withstanding high frequency vibration without physical damage
when tested as specified in 4.6.6.
3.6.9 Shock. Dischargers shall be designed and constructed to withstand specified shock load with no physical
damage (see 4.6.7).
3.6.10 Solvent resistance. Dischargers shall show no signs of deterioration from solvent materials when tested as
specified in 4.6.8.
3.6.11 Thermal shock. Temperature extremes specified in 4.6.9 shall not result in any damage, or alter the
function or operation of any of the dischargers covered by this specification.
3.6.12 Salt atmosphere (corrosion). There shall be no evidence of excessive corrosion. Excessive corrosion is
defined as that which interferes with the electrical or mechanical performance, or in the case of plated metals,
corrosion which has passed through the plating and attacked the base metal. There shall be no warping, cracking, or
other electrical or mechanical damage to the discharger (see 4.6.10).
3.6.13 Tension. All dischargers shall be so designed and constructed that their attachment into end components
and onward into the mounting adapter (if any) shall withstand without damage a load applied as in 4.6.11. The
discharger tip assembly shall similarly withstand a load of 10 pounds.
3.6.14 Sand and dust. When tested as specified in 4.6.12, dischargers shall be capable of withstanding sand and
dust. There shall be no evidence of excessive abrasion that will interfere with the electrical or mechanical
performance. There shall be no evidence of warping, cracking or other electrical or mechanical damage to the
discharger (see 4.6.12).
3.6.15 Magnetism. In order for a discharger to qualify as a non-magnetic discharger, it must pass the test
specified in 4.6.13.
3.6.16 Lightning survivability. In order to qualify as a lightning survivable discharger a unit must be tested per
RTCA/DO-160G Section 23, zone 1A. Following completion of this test, the unit shall remain intact and shall meet
3.7 Marking. Dischargers shall be permanently and legibly marked in accordance with MIL-STD-1285 and shall
include the following information:
a. Military part number.
b. Manufacturer's part number and name is optional.
c. Manufacturer's CAGE.
d. Date code. The date code shall consist of "MFD", followed by a four-digit number in which the
first two digits indicate the month and the last two digits indicate the year; i.e., "MFD-0500"
indicates a unit manufactured in May of 2000.
3.8 Recycled, recovered, or environmentally preferable, or biobased materials. Recycled, recovered,
environmentally preferable, or biobased materials should be used to the maximum extent possible, provided that the
material meets or exceeds the operational and maintenance requirements, and promotes economically advantageous
life cycle costs.
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