Each airline must have its own manuals rubber-stamped by the FAA, and each flight ops culture must have its own imprint and often re-invent the wheel, regarding c0ckp1t flows and checklists. Some change their flows every 4-7 years. Change for the sake of change, produced by some upstairs flight ops types via more paperwork. Some changes are in order to pretend that a domestic two-pilot jet flying 30-1:40-minute legs can operate like a three or four-engine system monstrosity on an eight-twelve hour "long march". No time for 'fishheads and rice' with five minutes at cruise during a really short flight, and no ATIS from ACARS.
John Nance wrote a book and proved how US deregulation led directly to some tragedies. He claimed that Air Florida had a real hodge-podge of a Flight Manual.
Our Admin. was totally committed to its lofty airline experiment, as each admin. has been since then, no matter what types of airline manuals/procedures were developed or fused together, types of accidents took place, no matter how bizarre and strange Professor Alfred Kahn's economic theories, advice from our 'dereg. guru'.
Oh well, back to the simple elegance of the SKS and Mosin Nagant 44.
