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Testing standard for an item described as rebuilt

Aviation Mechanic General (AMG) practice question 37 of 38 on Regulations, Maintenance Forms, Records, and Publications. ACS element AM.I.I.K6 · difficulty: recall. Want to answer it in a timed quiz? Use the Aviation Mechanic General (AMG) practice mode.

Question bank updated 2026-09-22

QUESTIONUnder 14 CFR part 43, an aircraft engine may be described in a required maintenance entry as "rebuilt" only if it has been disassembled, cleaned, inspected, repaired as necessary, reassembled, and tested to which standard?

  1. Athe standards and technical data used for an overhaul
  2. Bthe tolerances and limits recorded at the item's last inspection
  3. Cthe same tolerances and limits as a new item
Show the answer and explanation

Correct answer: C. the same tolerances and limits as a new item

  • A — incorrect Testing in accordance with approved standards and technical data is what § 43.2(a) requires before an item may be described as overhauled; the rebuilt description carries the stricter new-item benchmark.
  • B — incorrect No part of § 43.2 refers to tolerances recorded at a previous inspection; the benchmark for a rebuilt item is new-item tolerances and limits.
  • C — correct Section 43.2(b) requires a rebuilt item to be tested to the same tolerances and limits as a new item, using new parts or used parts that conform to new part tolerances and limits or to approved oversized or undersized dimensions.

BACKGROUND

Title 14 CFR § 43.2 controls how the words "overhauled" and "rebuilt" may be used in any required maintenance entry or form. Under § 43.2(a), an item may be called overhauled only after it has been disassembled, cleaned, inspected, repaired as necessary, and reassembled using methods, techniques, and practices acceptable to the Administrator, and tested in accordance with approved standards and technical data, or current standards and technical data acceptable to the Administrator that were developed by the holder of the type certificate, supplemental type certificate, or a part 21 approval. Under § 43.2(b), an item may be called rebuilt only after it has been disassembled, cleaned, inspected, repaired as necessary, reassembled, and tested to the same tolerances and limits as a new item. A rebuild may use new parts or used parts, but the used parts must conform to new part tolerances and limits or to approved oversized or undersized dimensions. Both terms govern what a person may write in a required record, so describing an item loosely in an entry violates the section.

STUDY TIP

Fix the split in your mind: overhauled is measured against approved standards and technical data, rebuilt is measured against a new item. Remember that both descriptions apply to what you write in the record, not just to the work performed.

KEY POINTS

  • An item described as rebuilt must be tested to the same tolerances and limits as a new item.
  • An item described as overhauled must be tested in accordance with approved standards and technical data.
  • A rebuild may use used parts only if they conform to new part tolerances or approved oversized or undersized dimensions.

SOURCES

  • 14 CFR 43.2(b)
  • 14 CFR 43.2(a)
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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.