How long may an aircraft be operated after the emergency locator transmitter has been initially removed for maintenance?

The correct duration for operating an aircraft after the emergency locator transmitter (ELT) has been removed for maintenance is up to 90 days. This regulation allows sufficient time for maintenance to be performed on the ELT, ensuring that it can be restored to proper working order without compromising the safety features that the ELT provides. The 90-day period strikes a balance between allowing necessary repairs and ensuring that aircraft operators maintain compliance with safety standards set out by aviation authorities.

In general, operators must ensure that all required equipment, especially safety devices like the ELT, are in working order. If the ELT is out of service, the aircraft cannot operate beyond this stipulated time frame to ensure that the aircraft remains compliant with safety regulations. This approach underscores the importance of monitoring and maintaining emergency equipment in aviation.