Narrative:

Nrt WX received by ACARS. Set altimeter using wrong setting at 14000 ft. Checked setting again by listening to very poor english by local controller. Passing 6000 ft controller says new altimeter setting. Reset to new setting and may have exceeded allowable tolerance for altitude deviation. Contributing factor would be late night on body clock and 12 hour duty day.

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Original NASA ASRS Text

Title: A B777 FLT CREW MISSETS THE ALTIMETER GOING INTO NRT RESULTING IN AN ALT EXCURSION.

Narrative: NRT WX RECEIVED BY ACARS. SET ALTIMETER USING WRONG SETTING AT 14000 FT. CHKED SETTING AGAIN BY LISTENING TO VERY POOR ENGLISH BY LCL CTLR. PASSING 6000 FT CTLR SAYS NEW ALTIMETER SETTING. RESET TO NEW SETTING AND MAY HAVE EXCEEDED ALLOWABLE TOLERANCE FOR ALTDEV. CONTRIBUTING FACTOR WOULD BE LATE NIGHT ON BODY CLOCK AND 12 HR DUTY DAY.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.