The US aviation regulator corrected a typo in a safety rule for certain Airbus helicopters. The original rule remains the same, but the measurement reference is now accurate.
Why it matters
This document is a correction of a previous rule, not a new rule. It fixes a small error in a technical measurement. This means that the safety instructions for these helicopters are now precisely what they were intended to be, without ambiguity.
The signal
There is nothing to watch here; this is a minor administrative correction.