14 CFR · Part 27
14 CFR § 27.1543
Instrument markings: general.
For each instrument—
(a)
When markings are on the cover glass of the instrument, there must be means to maintain the correct alignment of the glass cover with the face of the dial; and
(b)
Each arc and line must be wide enough, and located, to be clearly visible to the pilot.
Reflects the eCFR edition current as of September 29, 2026. Retrieved from ecfr.gov on October 16, 2026.
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