TA的每日心情 | 奋斗 5 天前 |
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本帖最后由 holycow 于 2019-3-14 16:19 编辑
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g- q5 @3 o% j$ n- I/ Q这是FAA几天前发的Continued Airworthiness Notice; \, X5 i$ b9 e0 D3 [% o" r2 _
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Ongoing oversight activities by the FAA include:
$ G% h, ] b' g& ?- Boeing’s completion of the flight control system enhancements, which provide reduced reliance on
' ^3 k. W, F! E) eprocedures associated with required pilot memory items. The FAA anticipates mandating these; y0 R" D0 p) T2 p1 C `
design changes by AD no later than April 2019.4 c! Z& h* C8 p
- Design changes include:$ A4 B, q+ z5 O' p3 |# `
MCAS Activation Enhancements, n2 K# W5 T9 M b' Q) d8 K
MCAS AOA Signal Enhancements
$ n$ c7 u `& C+ N8 ? MCAS Maximum Command Limit
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+ G. e) S+ M4 O$ B* o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, v+ W( n) ^6 F; K. W G8 u
/ B4 H. z( r# j' R4 oMaximum 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)- h! t) w+ q; v7 o) G3 m
2 ~ }5 Y/ t/ Y' {2 j- ^' w, t- {8 G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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