If we see a withdrawl of CAO 20.7.4 will we also see 20.7.1B pass into oblivion? Particularly restrictive to RPT and CHTR operations are the requirements of paragraphs 11.1 and 11.1.1 which add 67% and 43% to the landing distance required for jet and propeller aircraft respectively.
Viz:-
Citation 560 - Sea level, ISA +15:
16,300 LB (MTOW), TODR 3,510 FT.
15,200 LB (MLW), LDR 2,930 FT. PLUS FACTOR (67%) 4,893 FT!
No wonder most operators are still flying 30 year old Navajos if 21st century technology is so restrictive!