Rule 2.1: Write multi-word nouns of no more than three words

What a checker looks for

Usually a deviation, and context can excuse it.

• Identify unbroken strings of nouns/adjectives (no article, preposition, or conjunction between them) that modify a single head noun, and flag any such string longer than three words, e.g. 'Runway light connection resistance calibration' (5 words).
• Count a hyphenated compound that functions as one unit as a single word within the string (per rule 2.2's hyphen method); only flag when the string still exceeds three words after hyphenated units are collapsed to one word each.
• Pay special attention to procedure/instruction sentences where several nouns are stacked immediately before the object of an instruction (e.g. 'Install the forward turbine overheat thermocouple terminal tags').

What this rule does not cover

• A multi-word noun of three words or fewer is compliant, even if it is a dense technical compound (e.g. 'actuator operating rod').
• Words separated by a preposition or article (e.g. 'resistance of the connection') are not one multi-word noun string and are not counted together.
• The 'no article/preposition breaks up the string' parsing test is a derived syntactic heuristic for identifying multi-word noun boundaries, not wording from the standard itself — treat ambiguous parses as needing review.

How to fix it

Break the long noun string apart using prepositions (of, on, in, for) or a relative clause so that no single unbroken noun string exceeds three words; do not simply delete words or technical content to shorten it.

Constraints on the fix

• Preserve all technical information from the original phrase — restructure the wording, don't remove meaning.
• If the long string is itself an approved technical noun from official documentation that cannot be restructured, apply rule 2.2 instead of forcing a rewrite here.