Narrative:

Altitude deviation. First officer flying departure. Normal takeoff to 4000 ft where I called out transition altitude and we reset altimeters. Some turbulence and minor deviations for WX. Very busy departure. Approaching FL100 our assigned altitude I noticed that we had both set our altimeters to 28.92 instead of 29.92 and directed the first officer to descend back to FL100 on an altimeter of 29.92 which was done immediately. We went about 400-500 ft above our leveloff altitude. Remainder of flight was uneventful and there was no traffic conflict at the time of the incident. We both reset our altimeters individually but seemed to go to the closest .92 instead of the right setting. We should have been thinking about the strong low that was in the area. Supplemental information from acn 491108: as we approached FL100 paris center queried our altitude. It was then that the captain noticed the altimeter setting. I started a descent back down and we both adjusted the altimeters to the correct 29.92. The flight conditions were IFR with rain showers, cumulo nimbus and moderate chop, I believe this all contributed to the mistaken setting. Supplemental information from acn 491109: climbing out of charles de gaulle leveled off at 10000 ft. ATC queried us to maintain FL010. We then noticed that our altimeters were set at 28.92. I was the relief pilot on the flight and looked up and thought I saw 29.92 after the captain and first officer stated resetting their altimeters as they passed the transition altitude of 4000 ft. There was WX on departure that we were avoiding trying to request vectors off of the SID, at cdg, on a very busy frequency contributed to the distractions. We also sat on the runway for 40 mins waiting for the xwinds to come into limits so we could take off. The altimeter setting for departure from cdg was 971 millibars.

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Original NASA ASRS Text

Title: B767 CREW HAD ALT OVERSHOOT IN LFFF CLASS B.

Narrative: ALTDEV. FO FLYING DEP. NORMAL TKOF TO 4000 FT WHERE I CALLED OUT TRANSITION ALT AND WE RESET ALTIMETERS. SOME TURB AND MINOR DEVS FOR WX. VERY BUSY DEP. APCHING FL100 OUR ASSIGNED ALT I NOTICED THAT WE HAD BOTH SET OUR ALTIMETERS TO 28.92 INSTEAD OF 29.92 AND DIRECTED THE FO TO DSND BACK TO FL100 ON AN ALTIMETER OF 29.92 WHICH WAS DONE IMMEDIATELY. WE WENT ABOUT 400-500 FT ABOVE OUR LEVELOFF ALT. REMAINDER OF FLT WAS UNEVENTFUL AND THERE WAS NO TFC CONFLICT AT THE TIME OF THE INCIDENT. WE BOTH RESET OUR ALTIMETERS INDIVIDUALLY BUT SEEMED TO GO TO THE CLOSEST .92 INSTEAD OF THE RIGHT SETTING. WE SHOULD HAVE BEEN THINKING ABOUT THE STRONG LOW THAT WAS IN THE AREA. SUPPLEMENTAL INFO FROM ACN 491108: AS WE APCHED FL100 PARIS CTR QUERIED OUR ALT. IT WAS THEN THAT THE CAPT NOTICED THE ALTIMETER SETTING. I STARTED A DSCNT BACK DOWN AND WE BOTH ADJUSTED THE ALTIMETERS TO THE CORRECT 29.92. THE FLT CONDITIONS WERE IFR WITH RAIN SHOWERS, CUMULO NIMBUS AND MODERATE CHOP, I BELIEVE THIS ALL CONTRIBUTED TO THE MISTAKEN SETTING. SUPPLEMENTAL INFO FROM ACN 491109: CLBING OUT OF CHARLES DE GAULLE LEVELED OFF AT 10000 FT. ATC QUERIED US TO MAINTAIN FL010. WE THEN NOTICED THAT OUR ALTIMETERS WERE SET AT 28.92. I WAS THE RELIEF PLT ON THE FLT AND LOOKED UP AND THOUGHT I SAW 29.92 AFTER THE CAPT AND FO STATED RESETTING THEIR ALTIMETERS AS THEY PASSED THE TRANSITION ALT OF 4000 FT. THERE WAS WX ON DEP THAT WE WERE AVOIDING TRYING TO REQUEST VECTORS OFF OF THE SID, AT CDG, ON A VERY BUSY FREQ CONTRIBUTED TO THE DISTRACTIONS. WE ALSO SAT ON THE RWY FOR 40 MINS WAITING FOR THE XWINDS TO COME INTO LIMITS SO WE COULD TAKE OFF. THE ALTIMETER SETTING FOR DEP FROM CDG WAS 971 MILLIBARS.

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.