Definition
A specific regulation in Title 14 of the Code of Federal Regulations, Part 91 (General Operating and Flight Rules), Section 91.207, paragraph (c), which sets out the inspection requirements for emergency locator transmitters (ELTs). It requires that each ELT be inspected within 12 calendar months after the last inspection for proper installation, battery corrosion, operation of the controls and crash sensor, and the presence of a sufficient signal radiated from its antenna.
Plain English
A federal rule that says the emergency locator transmitter on the aircraft must be checked at least once every 12 calendar months to confirm it is installed correctly, the battery is in good condition, the controls and crash sensor work, and the antenna is sending a strong enough signal.
Context Anchor
You may see this citation in aircraft preflight documents, inspection records, or checklist items that confirm the emergency locator transmitter inspection is current.
Derivation
CFR stands for Code of Federal Regulations, the published collection of U.S. federal rules. Title 14 covers Aeronautics and Space, Part 91 covers general flight rules, and 91.207 is the specific section on ELTs. The lowercase (c) points to a single paragraph within that section, in this case the inspection requirement.
Why Pilots Care
A current inspection confirms the beacon will activate and help rescuers find the aircraft after an accident.
Intuition Check
Do not read this as just a random reference number. It points to a specific legal requirement about the aircraft’s emergency locator transmitter inspection.
Example Sentence 1
Before the flight, the pilot checked the maintenance logbook to confirm the ELT inspection required by 14 CFR part 91, section 91.207(c) had been completed within the last 12 calendar months.
Example Sentence 2
The annual inspection due date listed under 14 CFR part 91 section 91.207(c) was noted on the preflight checklist.