TA的每日心情 | 奋斗 2024-4-25 06:22 |
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本帖最后由 holycow 于 2019-3-14 16:19 编辑 1 T7 t! k: U0 w- t7 `
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# f5 c( ]6 ^1 @这是FAA几天前发的Continued Airworthiness Notice" D0 ?' a7 F. O. V. p; F% }5 y
+ N1 q& j$ B. XOngoing oversight activities by the FAA include:
6 c) K `7 e5 e- Boeing’s completion of the flight control system enhancements, which provide reduced reliance on+ w. _/ z: {2 D# |- |/ c8 k
procedures associated with required pilot memory items. The FAA anticipates mandating these
8 E J- j" `. [ K8 c! ydesign changes by AD no later than April 2019.
* l0 f7 z M1 o3 E8 L1 I- Design changes include:
& _0 S6 d1 \8 n% \7 `% ?3 J MCAS Activation Enhancements
7 B( }2 { g! l MCAS AOA Signal Enhancements
' m8 n" {' X5 b. v" W MCAS Maximum Command Limit
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`. j6 V. Z5 M* f& y0 x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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+ k8 `6 w6 r- v, 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)
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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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