This article initially appeared in PS 800 (Jul 19), p. 25.
Aircraft multipin electrical connectors are the electrical interface between the aircraft and avionics systems.
The failure of just one electrical connector could lead to a minor system failure at best, or a catastrophic failure at worst. Corrosion to electrical connectors is a serious concern and is an issue that is regularly overlooked. The difference between avionic and airframe corrosion is that relatively small amounts of corrosion in avionic equipment can cause intermittent malfunction or, worse, complete failure.
While it’s not a common practice among Soldiers, using an avionics grade MIL-PRF-81309, Type III corrosion preventive compound (CPC), assists in displacing any moisture present and prevents corrosion inside connectors. Using the incorrect CPCs degrades system performance and can cause failures. So use the right CPC.
When electronic system problems arise, reseating cannon plugs is a temporary fix. Refer to your aircraft’s IETM or Chap 6 of TM 1-1500-344-23-2. Only use MIL-PRF-81309, Type III, Avionics Grade inside connectors. NSN 8030-00- 546-8637 brings a 12-oz aerosol can.
For further corrosion assistance, contact the AMCOM Corrosion Program Office Hotline at (256) 313-0209. You can also visit the website:
Using correct CPC on avionics
is beneficial, if done correctly.