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本帖最后由 holycow 于 2019-3-14 16:19 编辑 B3 c7 t" l& h% q3 V% ~
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这是FAA几天前发的Continued Airworthiness Notice
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; P7 [6 z. z! W! _* jOngoing oversight activities by the FAA include:
; U0 u0 `* p5 K- Boeing’s completion of the flight control system enhancements, which provide reduced reliance on
0 L6 e. |" F& P: L2 `/ K# }8 ~4 p6 G0 Bprocedures associated with required pilot memory items. The FAA anticipates mandating these
! f! k: ^+ S/ X3 {8 z, odesign changes by AD no later than April 2019.
- ?/ {# Z; l; T* d- Design changes include:
i/ T) n% S% F0 a% O MCAS Activation Enhancements, t' `5 y, H" w% u" O
MCAS AOA Signal Enhancements5 ?3 W; S6 I" 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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8 r* o4 D0 w0 N- |Maximum 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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