This Special Airworthiness Information Bulletin alerts you, owners, operators, and maintainers of Merl, Inc. Batteries, used in Narco Emergency Locator Transmitters (ELTs), that there is a potential maintenance oversight related to inspection requirements in § 91.207 of Title 14 of the Code of Federal Regulations (14 CFR 91.207). This maintenance oversight could lead to undetected battery leakage and subsequent corrosion that could result in the ELT becoming inoperable. Regulatory action is not required at this time since the airworthiness concern is not an unsafe condition that would warrant airworthiness directive action under 14 CFR part 39.
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