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Not that familiar with the 757 but GPS displays GS. Add or subtract winds to get TAS, then correct for density (divide by SMOE) to get IAS?CAS. Heard it suggested you could also depressurize and use the cabin altimeter for altitude. Or, convert cabin altitude into aircraft altitude if the chart is available. Curt Multiple redundant systems on Commercial jets. Figure out which one is bad and turn it off. The standby #3 system is analog and totally separate if it's like a 747-400. The captain should have given control to the copilot in the turkish aircraft incident. Well, that's only if you follow the flight manual and common sense. Just discussed this one in my quarterly refresher. The discussion turned to "what if" you lost all airspeed and altitude indications. It was an exercise in making us think. It would also be a handy method to double check the primary instruments, or to have something to do on those long overwaters. Curt |
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