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 S+ S3 Y5 i- f. L
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这是FAA几天前发的Continued Airworthiness Notice1 h, X- n0 b7 @' Q3 K2 U
, C: ~% U0 _+ ^1 O3 ?1 j& |+ YOngoing oversight activities by the FAA include:5 p y* E9 k9 g+ d2 N" @6 v
- Boeing’s completion of the flight control system enhancements, which provide reduced reliance on
+ y% I* E" w5 T, M' bprocedures associated with required pilot memory items. The FAA anticipates mandating these+ X" n: C% s" Q( g( h
design changes by AD no later than April 2019.: ]; A- B7 }# f
- Design changes include:
: q7 V3 ~7 ~% m3 T MCAS Activation Enhancements1 E+ H0 a6 T% G& R+ r1 _. s, b
MCAS AOA Signal Enhancements2 l, k8 ]+ S9 l1 z! c8 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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& Y. R% ^) T/ kMaximum 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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