TA的每日心情 | 奋斗 4 小时前 |
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本帖最后由 holycow 于 2019-3-14 16:19 编辑
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4 Z9 p& }0 T- R这是FAA几天前发的Continued Airworthiness Notice
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Ongoing oversight activities by the FAA include:8 _$ m3 J+ _$ K3 A* k8 v
- Boeing’s completion of the flight control system enhancements, which provide reduced reliance on
6 q, ^6 f* w8 X& o, ]7 V. Gprocedures associated with required pilot memory items. The FAA anticipates mandating these( P" l1 i: w. E. Q l
design changes by AD no later than April 2019.4 x% o- M& ]5 z |
- Design changes include:
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MCAS AOA Signal Enhancements% u2 G Y, \4 b& D2 R; F; v
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# b- O7 h0 }9 g! x* L1 y
6 I- V; _. {8 d3 k# ?, hMaximum 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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