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by flaminHotSpeedo 892 days ago
The type rating is the big factor, and that's largely driven by desire and/or pressure from customers.

IMO type ratings, and particularly the categorization of types, needs an overhaul. The current type rating system is, IMO, the primary indirect factor leading to the max accidents (customers demanded the impossible - more efficient engines with a 37 type rating) as well as countless other design decisions that seem silly from the outside.