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Thread: Why B737 only CAT IIIA?
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Old 14th Oct 2006, 05:38
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Wizofoz
 
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Because the 737 (or at least most of them) only have two Autopilots and are therefore certified for dual-chanel, fail passive operations (EG Cat IIIA) whilst the 'Bus has three and are certified for Tripple Chanel fail-safe operations (EG CatIIIB).

I believe a third AP and CatIIIB capability is an option on current-build 737s.
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