A B737 first officer erroneously set his altimeter at 30.64 while the captain correctly set 29.64 an...

Narrative:

We were given a descent to 13;000 ft. There were reports of moderate turbulence in the descent and the wind at the airport was gusting to 49 KTS. We were discussing the landing conditions and turbulence. We descended through 18;000 ft. The current altimeter setting at den was 29.64. The captain set 29.64 in her window and I set 30.64 in my window. I called for the descent checklist. In the response of 'altimeter and bugs;' I glanced at the captain's window and saw .64 and looked at mine and saw .64 and verified crosschecked. We were experiencing moderate turbulence in the descent. I was slowing the descent down as I approached 13;000 ft. When the captain voiced; 'aren't we supposed to be leveling at 13;000 ft; I immediately looked at her altimeter and then looked at the ATIS sheet and realized my altimeter was set incorrectly at 30.64 instead of 29.64. I stopped the descent and climbed back up to 13;000 ft. We had in fact reached 12;100 ft. The captain said to ATC that we had gone below our assigned altitude and were climbing back up to the correct altitude.

Original NASA ASRS Text

Title: A B737 First Officer erroneously set his altimeter at 30.64 while the Captain correctly set 29.64 and nearing 12;000 FT realized they have overshot the clearance altitude of 13;000 FT and corrected.

Narrative: We were given a descent to 13;000 FT. There were reports of moderate turbulence in the descent and the wind at the airport was gusting to 49 KTS. We were discussing the landing conditions and turbulence. We descended through 18;000 FT. The current altimeter setting at DEN was 29.64. The Captain set 29.64 in her window and I set 30.64 in my window. I called for the Descent Checklist. In the response of 'altimeter and bugs;' I glanced at the Captain's window and saw .64 and looked at mine and saw .64 and verified crosschecked. We were experiencing moderate turbulence in the descent. I was slowing the descent down as I approached 13;000 FT. When the Captain voiced; 'Aren't we supposed to be leveling at 13;000 FT; I immediately looked at her altimeter and then looked at the ATIS sheet and realized my altimeter was set incorrectly at 30.64 instead of 29.64. I stopped the descent and climbed back up to 13;000 FT. We had in fact reached 12;100 FT. The Captain said to ATC that we had gone below our assigned altitude and were climbing back up to the correct altitude.

Data retrieved from NASA's ASRS site as of July 2013 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.

Attributes
ACN	1001115
Time
Date	201203
Local Time Of Day	1201-1800
Place
Locale Reference	DEN.Airport
State Reference	CO
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	B737-300
Operating Under FAR Part	Part 121
Flight Phase	Descent
Flight Plan	IFR
Component
Aircraft Component	Altimeter
Person 1
Function	First Officer Pilot Flying
Experience	Flight Crew Last 90 Days 158
Events
Anomaly	Deviation - Altitude Overshoot Deviation - Procedural Clearance Deviation - Procedural Published Material / Policy Inflight Event / Encounter Weather / Turbulence

A B737 first officer erroneously set his altimeter at 30.64 while the captain correctly set 29.64 and nearing 12;000 ft realized they have overshot the clearance altitude of 13;000 ft and corrected.