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Scope of a § 43.9 signature

Aviation Mechanic General (AMG) practice question 5 of 37 on Regulations, Maintenance Forms, Records, and Publications. ACS element AM.I.I.R4 · difficulty: standard. Want to answer it in a timed quiz? Use the Aviation Mechanic General (AMG) practice mode.

Question bank updated 2026-09-22

QUESTIONA mechanic replaces a magneto and signs the maintenance record entry required by § 43.9. Under § 43.9(a)(4), what does that signature constitute?

  1. AApproval for return to service only for the magneto work performed
  2. BCertification that the entire aircraft has been inspected and is airworthy
  3. CApproval of all maintenance recorded in the logbook since the last annual
Show the answer and explanation

Correct answer: A. Approval for return to service only for the magneto work performed

  • A — correct § 43.9(a)(4) states that the signature constitutes the approval for return to service only for the work performed.
  • B — incorrect A whole-aircraft airworthiness certification belongs to an inspection entry under § 43.11, not a § 43.9 maintenance entry.
  • C — incorrect The signature covers only the work that person performed, not other entries in the logbook.

BACKGROUND

Section 43.9 of 14 CFR part 43 sets the content of a maintenance record entry: a description of the work or a reference to acceptable data, the date of completion, the name of the person who did the work if different from the person approving it, and, if the work was done satisfactorily, the signature, certificate number, and kind of certificate of the person approving the work. Paragraph (a)(4) states that the signature constitutes the approval for return to service only for the work performed. The Aviation Maintenance Technician Handbook–General points out that logbook statements such as the aircraft being hereby returned to service are not required by the regulation, and that the technician is only signing off the work they have done. The handbook contrasts this with a § 43.11 inspection entry, which usually carries a broader scope of responsibility.

STUDY TIP

Do not let routine turn a maintenance sign-off into a blanket statement; write and sign for exactly the work you did.

KEY POINTS

  • § 43.9 requires what, when, and who in a maintenance entry.
  • The signature approves return to service only for the work performed.
  • Broader airworthiness statements belong to § 43.11 inspection entries.

SOURCES

  • 14 CFR 43.9(a)(4)
  • FAA-H-8083-30B ch02 "Section 43.9--Content, form and disposition of maintenance, preventive maintenance, rebuilding, and alteration records"
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SkyDrill is not affiliated with the FAA. This is an original practice item based on FAA-H-8083-30B Aviation Maintenance Technician Handbook – General, 14 CFR part 43 and part 65. Regulations and handbooks are revised; confirm details against the current edition.