Strong Gusty Crosswinds

摘要

NLR's scope included querying operators about understanding of aircraft certification for crosswind and relevant policies and procedures; a brief review of factors in crosswind-related occurrences; a review of measurement technologies; and the salience of wind instrument precision. "First of all, we noticed that the way of arriving at and presenting the [crosswind] information varies between the manufacturers and even between the aircraft models" van Es said. "Most [manufacturers] don't mention any kind of gusts, but also the way they've derived the [demonstrated crosswind value] during the flight test can be very different, giving different results. And they are allowed to, and the regulations on the means of compliance [allow them] this op- portunity. Limits, real hard limits, are very rare, nor are they required to be established. Typically, it's up to the operators to decide if they transfer a demonstrated value into a hard limit.