Q1096. How to translate aircraft maintenance manuals and technical parts catalogues?

Answered by the NYC Visa & Translation certified translation team

Aircraft maintenance manuals and parts catalogues are controlled technical documents under the manufacturer's revision system, and their translation is governed by airworthiness logic rather than general translation practice. The governing facts: the authoritative maintenance data (AMM, CMM, IPC, SRM) is issued by the manufacturer in English, and under CAAT and ICAO-aligned practice, English is the working language of Thai maintenance organisations — so full translation is generally not required or even desired, because a translated manual diverges from the manufacturer's revision control. Where translation does occur: operator-specific procedures derived from the manuals for Thai-speaking staff, training materials, and safety-critical task cards — and these translations must carry a revision-control link to the source manual's revision so they are updated when the manufacturer revises. Rules that matter: part numbers, ATA chapter references, torque values, and service bulletin numbers are transcribed exactly — a wrong part number in translation grounds aircraft; illustrated parts catalogues are used by part number and figure reference, not by translated description; and any translated maintenance instruction used in actual maintenance must be controlled under the operator's approved maintenance organisation exposition. Caution: an uncontrolled translation of maintenance data is an airworthiness risk and an audit finding — the translation must sit inside the operator's document-control system. For regulatory filings involving translated technical data, confirm CAAT's acceptance per document class. This is a specialist domain — use translators with aviation maintenance backgrounds.