TA的每日心情 | 奋斗 2026-7-13 23:45 |
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本帖最后由 holycow 于 2019-3-14 16:19 编辑 7 ~/ M: `" l3 t
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这是FAA几天前发的Continued Airworthiness Notice
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! i5 g% G h- r) b+ ^Ongoing oversight activities by the FAA include:
; V+ h) R2 I# `2 S7 j" ~/ |: M- Boeing’s completion of the flight control system enhancements, which provide reduced reliance on4 T# B& ^% d& f; {. X
procedures associated with required pilot memory items. The FAA anticipates mandating these
! g5 I% i/ Q% Y$ p4 p, A) q$ c* kdesign changes by AD no later than April 2019.( r5 L7 a1 C7 J; w
- Design changes include:
: X2 O( y: F2 f! k; S, U# N MCAS Activation Enhancements, V- w6 v3 E& ~% ]: Y9 z
MCAS AOA Signal Enhancements! }% o1 ^7 o: ~) T& d1 ^* ^
MCAS Maximum Command Limit, a0 z8 L, ~3 y! @ ]
$ Q9 ?; Y1 A/ z! {% e& ~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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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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