TA的每日心情 | 奋斗 2026-9-3 19:52 |
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本帖最后由 holycow 于 2019-3-14 16:19 编辑 $ ]/ ~& Z, m* o
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这是FAA几天前发的Continued Airworthiness Notice5 I* ~+ J/ X& Q; D) l# B R
& S. E6 ^5 d# {: q; n9 m' jOngoing oversight activities by the FAA include:- a/ R7 O9 n7 w4 |0 U* S3 G
- Boeing’s completion of the flight control system enhancements, which provide reduced reliance on; z1 H) t* O2 U( I1 n1 X8 k
procedures associated with required pilot memory items. The FAA anticipates mandating these
3 c0 |( i' o8 Q8 edesign changes by AD no later than April 2019.* O. B/ a' x+ |
- Design changes include:
( y( X& o+ i# J0 P" [' n2 [ MCAS Activation Enhancements
8 s& e$ h w7 c7 B, c MCAS AOA Signal Enhancements2 X( A3 r& L6 y. J9 \( U# I
MCAS Maximum Command Limit
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1 ~" d4 M+ Y2 V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MCAS0 ~7 ~# L% C; D, [, }' U; S
, i9 I- b) Q) y0 i/ p/ bMaximum 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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/ b# c' D1 K B( ]5 \/ Z0 P$ o. y9 [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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