MIL-PRF-18148D
c. A 50 percent aqueous solution of ethylene glycol for 20 ± 1 hours.
d. MIL-PRF-5606 aircraft hydraulic fluid for 20 ± 1 hours. Note: Do not perform
step 4.5.15.2.b.
e. MIL-PRF-23699 aircraft engine lubricating oil for 20 ± 1 hours. Note: Do not
perform step 4.5.15.2.b.
f. MIL-PRF-85570 Type I exterior aircraft cleaner, 1 part cleaner to 10 parts tap water,
for 20 ± 1 hours.
4.5.15.2 Test procedure. This test shall consist of the following steps.
a. Measure the major dimensions of each specimen with a micrometer. Weigh each
specimen on a chemical balance. Place the specimen in a vessel with a lid. Completely immerse
the specimen in the room temperature test solution of 4.5.15.1.a, cover the vessel, and allow the
vessel to stand at room temperature for the indicated length of time (see 4.4.1 and 4.5.15.1).
b. Rinse the specimen in water. However, do not rinse the specimens of 4.5.15.1.d and
4.5.15.1.e.
c. Wipe dry. Examine the identification marking. Inspect all samples for evidence of
cracks or blisters. Measure and weigh the samples. Calculate the percentage change in major
dimensions and weight. Examine the item for the requirements of 3.12.15.
d. Repeat steps 4.5.15.2.a through 4.5.15.2.c for each of the indicated test solutions of
4.5.15.1 in turn.
e. Subject the plug to the tests of 4.5.7.1, 4.5.8.1, and 4.5.9.1. Examine the plug for the
requirements of 3.12.15.
f. Subject the receptacle to the tests of 4.5.7.1 and 4.5.10. Examine the receptacle for the
requirements of 3.12.15.
4.5.16 Salt fog test. Ensure all connectors are uncovered and oriented away from direct
salt fog spray. Subject the connector to the salt fog test of MIL-STD-810, method 509.1,
procedure I for 48 ± 2 hours. After completion of the test, clean any salt residue from the
connector by flushing the connector with distilled water and wiping dry. Examine the connector
for the requirements of 3.12.15. Subject the plug to the tests of 4.5.7.1, 4.5.8.1, and 4.5.9.1.
Examine the plug for the requirements of 3.12.15. Subject the receptacle to the tests of 4.5.7.1
and 4.5.10.. Examine the receptacle for the requirements of 3.12.15.
4.5.17 Vibration test. Attach 000-gauge cables to the plug during this test.
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