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Would you stake your life, right now, on the condition of your equipment?
NEWS | April 19, 2023

M989A1 HEMAT Trailer: Combat Water Intrusion

BLUF: M989A1 HEMATs are experiencing water intrusion and guidance is available to mitigate it.

HEMAT trailer
Photo courtesy of UTAP
Maintainers, if you have an M989A1 HEMAT, you might already know that these trailers are experiencing water intrusion on the box frame. That’s why you’ll need to check the trailer for water intrusion and mitigate it if you see it.  
TACOM maintenance action message (MAM) 23-017 says the HEMAT water intrusion, which primarily collects in the lowboy hull of the frame, is due to:
  • unsealed screw heads.
  • unsealed holes. 
  • lack of caulking tape on the top surface of the lowboy where the wood decking is installed.
To combat water intrusion in the HEMAT, have your CAC handy and get the instructions from TACOM MAM 23-017 HERE.
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