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本帖最后由 holycow 于 2019-3-14 16:19 编辑
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6 ?8 p+ a3 f! V1 [0 G* A这是FAA几天前发的Continued Airworthiness Notice. l# L4 z( k$ d/ G/ {; @
* e& x' i; e. C1 \Ongoing oversight activities by the FAA include:
. X& n& ]) X4 o1 h- W2 Y- Boeing’s completion of the flight control system enhancements, which provide reduced reliance on
0 s6 ~- \* o; P. `' B3 yprocedures associated with required pilot memory items. The FAA anticipates mandating these1 l4 ]) A6 I' r! L/ ?
design changes by AD no later than April 2019.: M9 x$ R5 o( z) f5 C0 F) k! f' @
- Design changes include:1 a# R1 R* Y$ v8 a1 e
MCAS Activation Enhancements2 l \9 {7 e' Y+ f) {
MCAS AOA Signal Enhancements8 Y# I- a' [: K/ B9 y1 d9 O. M4 D
MCAS Maximum Command Limit
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那两个bold items, signal那个我看到的解释是任何时候输入信号都只有一路,reset MCAS可以左右切换,但有左边没右边,有右边没左边。第三路信号是进standby display, 根本不进MCAS
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" b( c6 |8 n# [- ^3 CMaximum Command Limit,很简单,要求任何时候不能剥夺elevator的authority。反过来看,现在就是stab trim到一定位置就剥夺了elevator的authority(不加限制的必然结果)/ }/ W5 t. m: v7 Q# ^
7 E. S; |! ~) R0 P' D, q& L扰流片的问题,有人现在提出来MAX的spoiler从NG的机械控制改成FBW, 然后各种scenario, 那部分我还没有完全看明白 |
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