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Welcome to the Dauntless Aviation Glossary!
At Dauntless, our editorial staff maintains the web's largest unified glossary of aviation terms. This glossary is built from a combination of official, quasi-official,
and proprietary sources (including original material that we develop oursselves). Uniquely, we often provide multiple definitions of a given term so that you can find that which best applies
to you. In order to maximize your learning efficiency, this glossary (and similar ones for our international users) is incresingly fully integrated into our aviation learning apps, including
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Overhaul
| Overhaul | | Overhaul. In the general aviation industry, the term engine overhaul has two identifications
that make a distinction between the degrees of work done on an engine:
- A major overhaul consists of the complete disassembly of an engine, inspected,
repaired as necessary, reassembled, tested, and approved for return to service within
the fits and limits specified by the manufacturer's overhaul data. This could be to new
fits or limits or serviceable limits. The determination as to what fits and limits are used
during an engine overhaul should be clearly understood by the engine owner at the
time the engine is presented for overhaul. The owner should also be aware of any parts
that are replaced, regardless of condition, as a result of a manufacturer's overhaul data,
service bulletin, or an ariworthiness directive.
- Top Overhaul consists of the repair of parts outside of the crankcase and can be
accomplished without completely disassembling the entire engine. It can include the
removal of cylinders, inspection and repair to cylinders, inspection and repair to
cylinder walls, pistons, valve-operating mechanisms, valve guides, valve seats, and the
replacement of pistons and piston rings. A top overhaul is not recommended by all
manufacturers. Some manufacturers indicate that if a powerplant requires work to this
extent, it should be given a complete overhaul.
| | source: FAA Reciprocating Engine Terminology (AC 43-11) |
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Disclaimer: While this glossary in most cases is likely to be highly accurate and useful, sometimes, for any number of editorial, transcription, technical, and other reasons, it might not be.
Additionally, as somtimes you may have found yourself brought to this page through an automated term matching system, you may find definitions here that do not match the cotext or application in which
you saw the original term. Please use your good judgement when using this resource.
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