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An ELT (Emergency Locator Transmitter) installed in a US-registered aircraft must be inspected within

Choices

✓ 12 calendar months.correct
Per 14 CFR 91.207(d), the ELT must be inspected every 12 calendar months. The inspection covers proper installation, battery corrosion, controls, and a test of crash-activation sensor (without transmitting). The battery must be replaced when 50% of useful life is reached (or after 1 cumulative hour of use).
24 calendar months.
24 months is wrong — that's the transponder/altimeter cycle.
100 hours of flight time.
Hour-based intervals don't apply to ELTs.
every annual inspection only.
ELT inspection is its own 12-month requirement, not bundled with annual.

Why

Per 14 CFR 91.207(d), the ELT must be inspected every 12 calendar months. The inspection covers proper installation, battery corrosion, controls, and a test of crash-activation sensor (without transmitting). The battery must be replaced when 50% of useful life is reached (or after 1 cumulative hour of use).

FAA source: 14 CFR 91.207(d); 14 CFR 91.207(d)browse the reference library →

Covered in Supplemental · IX — Emergency Operations — study the lessons free, then practice with grading and mastery tracking.

Original study question written for this course — representative of FAA knowledge-test topics, not an actual current FAA exam question.