Installation of MASS Systems fire extinguisher cartridges as replacements for W. Kidde Aerospace/L Hotellier/Dexaero fire extinguisher cartridges in fire extinguisher bottles installed in the rotorcraft models noted on the FAA Approved Model List SR01343LA dated June 28, 2002, or later FAA approved revisions. This cartridge is in accordance with MASS Systems Master Drawing List MDL-861345, Revision N/C, dated May 31, 2002, or later FAA approved revisions. View PDF on drs.faa.gov ↗

The STC PDF is authoritative: installation instructions, ICA requirements and limitations.