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x QRH 10-6 NON-QRH
ETOPS Significant System
Messages: ALT DISAGREE
Condition: The captain’s and the first officer’s altitude indications disagree by more than 200 feet.
After QRH procedures complete. Contact SOC to update condition and review. Airplane does not meet RVSM. Transponder unreliable. Maintain VFR if possible. Requires a diversion. Use electronic and visual glideslope indicatiors, where availavle, for approach and landing. Alternate selection should include the best practical WX for safest course of action.
Airplane does not meet RVSM. Transponder unreliable. Maintain VFR if possible. Requires a diversion. Use electronic and visual glideslope indicatiors, where availavle, for approach and landing. Alternate selection should include the best practical WX for safest course of action.
MX procedures that could follow.