Underwater Locating Devices (Acoustic) (Self-Powered)
This Notice extends the planned revocation date of Technical Standard Order (TSO) authorization for the production of Underwater Locating Devices (ULD) (Acoustic) (Self-Powered) manufactured to TSO- C121 and TSO C-121a specifications. This action is necessary to facilitate an efficient transition to UDLs with a 90-day minimum battery operating life manufactured to the TSO-C121b specifications.
Emergency Locator Transmitters (ELTs)
FAA evaluated five separate courses of action with regard to the airworthiness approvals for securing ELTs with hook and loop fasteners. This notice summarizes the inadequacies of hook and loop fasteners as a means for securing ELTs, and avoids placing an undue burden on aircraft owners while acknowledging the voluntary efforts of ELT manufacturers to improve designs.