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SESK: Stuff Everyone Should Know · sesk.info/comm-hundred-hour

An aircraft carrying passengers for hire needs an annual or 100-hour inspection within how many hours of time in service?

100 hours of time in service.

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  1. 50 hours
  2. 100 hours ✔
  3. 150 hours

Why: Section 91.409(b) covers carrying anyone other than a crewmember for hire, and flight instruction for hire in an aircraft you provide. The aircraft needs an annual or 100-hour inspection within the preceding 100 hours of time in service.

Huh, didn't know that: A 100-hour inspection counts as an annual only if someone authorized to do annuals performs it and records it as an annual.

The dad joke
Why did the mechanic love the 100 hour mark? It was the perfect time for a check-up.
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References

Answer: 100 hours. Section 91.409(b) covers carrying anyone other than a crewmember for hire, and flight instruction for hire in an aircraft you provide. The aircraft needs an annual or 100-hour inspection within the preceding 100 hours of time in service.

  1. 14 CFR 91.409 Inspections (Cornell LII eCFR mirror) www.law.cornell.edu/cfr/text/14/91.409
    within the preceding 100 hours of time in service the aircraft has received an annual or 100-hour inspection
    Checked 2026-10-10.

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