这是在 HYD G(Y) SYS PRESS LO 警告描述中的一段话。
意思是说，SD 页面上仍然显示带框的 NORM（也就是现用为正常刹车）是不对的，需要忽略。从理论上我们知道，失去液压之后，正常刹车不工作，而应该会使用蓄压瓶供压的备份刹车，所以此时应该是带框的 ALTN，以及琥珀色的 NORM。
正常情况显示：
模式降级：
带框及琥珀色意义说明：
然而在 DSC-29-40 A DISCREPANCY BETWEEN WHEEL SD page AND ECAM ALERTS IN THE CASE OF HYDRAULIC FAILURE - NORM INDICATION 也提到同一个问题：
标红部分很难理解，我一度认为空客是想说“显示的（带框的）NORM 而不是（带框的）ALTN”。结果空客回复让我很无语：
“显示的是 NORM, 而不是 NORM”……但由于字体颜色原因，在 PDF 版本手册里根本无法区分这两个 NORM。
具体请参考 TechRequest原文：
Q: HYD G(Y) SYS PRESS LO
Refer to DSC-29-40 A DISCREPANCY BETWEEN WHEEL SD page AND ECAM ALERTS IN THE CASE OF HYDRAULIC FAILURE - NORM INDICATION
A:
The NORMAL indications are color coded, the ECAM shows NORMAL in GREEN instead of NORMAL in AMBER, therefore no need to change.
Q_2:
Is there any way to distinguish these "NORM" with different color in FCOM? Bracket like "NORM(green)" or clorful font like "NORM"?
A_2:
Your document is printed in Black & White, this is the reason why you cannot make the difference between both "NORM" indications.
When you consult the OLB format, you can see the following:
Therefore, you can see both indications: one is green and the second one is amber.
