ATA 24

Lead Acid Batteries
Supplemental Type Certificate (STC) SA1214SO installs Gill batteries into the 1124 aircraft. Please be aware that this STC DOES NOT include the 1124A models. We have found that most Flight Standards District Offices (FSDOs) will not field approve the installations, because there is no flight manual supplement approved for that installation. When you install the batteries into an 1124 model, Gill will provide a letter stating the sealed series batteries are a replacement for the vented type, and that the sump jar is no longer needed when the sealed series are installed. We can provide you a copy of the letter if you need it. As for Concorde batteries, no STC exists for them, but they do have Parts Manufacturer Approval (PMA). This is not an approval for installation, however, so ask your local FSDO if they will approve the installation. Most of the installations we have seen were done with Gill’s paperwork, which DOES NOT include the A models.