Properly implement autoland arm & engage logic

[tdammers]

CAT-I:

• BARO minimums selected on active-side PFD
• CAT-I approach in PERFORMANCE > LANDING selected
• Active side nav source set to VOR/LOC, or preview enabled on active side
• Flaps 5 or FULL

CAT-II:

• Same minimums set on both PFDs

• RA minimums selected

• CAT-II approach in PERFORMANCE > LANDING selected

• Nav source set to VOR/LOC, or preview enabled, on BOTH sides

• Flaps 5

• Autoland mode arms when APP mode armed and conditions met.

• Autoland engages at 1500 ft AGL. If the only condition not met for CAT-II approach is flaps, APPR 2 still engages.

• At 800 ft AGL, if APPR 2 is engaged and any condition (including flaps) is not met, APPR 2 disengages, and APPR 1 engages instead.

See AOM pages 1464ff.