在限制章节 LIM-AG-OPS B 中,对舱门操作的风速限制有 40kt 和 60kt 两个风速限制有点矛盾。如果超过了最大的操作舱门限制 40kt,又如何在 60kt 之前去关闭舱门呢?
空客回复说超过 60kt 会造成损坏,但由于不是很好确定实时的风向风速,同时考虑到阵风的因素,所以留了一个余度,把操作速度限制在了 40kt,结果就是看起来有点矛盾。
所以实际操作中,首先应该是在 40kt 之前尽快关闭舱门。而如果实在超过了 40kt,该关舱门还是要关,免得超过了 60kt 造成损坏。
原文:
Q:
As limitation in LIM-AG-OPS B MAXIMUM WIND FOR CABIN AND CARGO DOORS OPERATION, the Maximum wind for cabin and cargo doors operation is 40 kt. However, the requirement below is "The cabin and cargo doors must be closed before the wind reaches 60 kt".
So, when wind is above 40 kt, we can't operate the door to make sure it can be closed before 60 kt. Is it a dilemma?
A:
The static strength of the entire cabin or cargo door is proven against 60 knots wind speed. Above this value there is a risk that the affected door will be damaged.
It is difficult to define the exact wind speed and direction and how it will evolve during the next few minutes (also considering wind gusts).
Therefore, standard door operation is allowed for normal wind speed up to 40 kt (50 kt with A/C nose in wind direction).
The 40-60 knots range (50-60 knots for A/C nose in wind direction) is intended as a "safety/reserve" margin - also to cover wind gust in that range.