What it approves
Replace existing nickel-cadmium batteries with Teledyne Gill BB638/T series lead-acid battiers.
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No AD in this release names this STC
Supplemental type certificate · Teledyne Battery Products
From FAA DRS. DRS record last changed December 6, 2025.
Replace existing nickel-cadmium batteries with Teledyne Gill BB638/T series lead-acid battiers.
An AD can apply because an STC is installed, or mention one in its text.