A319 captain describes an altitude deviation caused by the first officer pulling the baro set knob to set qnh and forgetting to push it back in for qne. This results in a 350 foot overshoot while descending to FL310.

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Attributes
ACN	1234344
Time
Date	201501
Local Time Of Day	0001-0600
Place
Locale Reference	ZOB.ARTCC
State Reference	OH
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Make Model Name	A319
Operating Under FAR Part	Part 121
Flight Phase	Descent
Flight Plan	IFR
Component
Aircraft Component	Altimeter
Person 1
Function	Captain Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 225 Flight Crew Total 30000 Flight Crew Type 13000
Events
Anomaly	Deviation - Altitude Overshoot Deviation - Procedural Published Material / Policy Deviation - Procedural Clearance

Narrative:

Failed to level off at FL310 and caught error at about 30;650. First officer failed to reset alt to standard after putting in field altimeter. Advised ATC we were about 350 feet low. Cleared us for descent via at that time.

Original NASA ASRS Text

Title: A319 Captain describes an altitude deviation caused by the First Officer pulling the baro set knob to set QNH and forgetting to push it back in for QNE. This results in a 350 foot overshoot while descending to FL310.

Narrative: Failed to level off at FL310 and caught error at about 30;650. First Officer failed to reset alt to standard after putting in field altimeter. Advised ATC we were about 350 feet low. Cleared us for descent via at that time.

Data retrieved from NASA's ASRS site 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.