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
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# S9 G3 b V, n2 B9 f/ d) S' L这是FAA几天前发的Continued Airworthiness Notice3 z' { R' c) F; n
1 T6 U0 y# B7 p: a: g9 S# [ HOngoing oversight activities by the FAA include:
7 i- E7 v) _0 F. I$ Z3 q* Y' ?3 ]- Boeing’s completion of the flight control system enhancements, which provide reduced reliance on" o8 h y3 A" B; p P# q
procedures associated with required pilot memory items. The FAA anticipates mandating these
+ \4 p0 ? H6 I5 ^0 C/ Fdesign changes by AD no later than April 2019.
9 ^! Q% y1 {1 R% B- Design changes include:5 m+ }* l3 j* {& O7 v9 y
MCAS Activation Enhancements- R B4 I& C1 y
MCAS AOA Signal Enhancements& ^; x+ W/ a( ]) c. s4 P) D2 M
MCAS Maximum Command Limit3 ?. E9 L4 ?8 \
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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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2 q* D& P5 g8 j/ u1 A) L! F9 dMaximum 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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& Q4 S0 C/ p4 h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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