A B737-800 air crew upon receipt of a descent clearance; pressed the 'altitude intv' button. In doin...

Attributes
ACN	1237102
Time
Date	201502
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.ARTCC
State Reference	US
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Make Model Name	B737-800
Operating Under FAR Part	Part 121
Flight Phase	Descent
Flight Plan	IFR
Person 1
Function	First Officer Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Total 15000
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Altitude Crossing Restriction Not Met Deviation - Altitude Overshoot Deviation - Procedural Clearance Deviation - Procedural Published Material / Policy

Narrative:

I was the pilot monitoring and we were cleared to descend via the arrival into ZZZ. The bottom altitude is 10;000 feet which was set properly. The 'altitude intv' button was pressed once the clearance was received which I believe cancelled the first altitude constraint of fix zzzzz at or above FL240. We ended up crossing fix zzzzz approximately 1;000 feet low. The rest of the crossing altitudes were all made without incident and we landed safely. The center controller did not say anything. Active pilot monitoring would prevent this from happening in the future. I will pay closer attention to each altitude when climbing or descending from now on.

Original NASA ASRS Text

Title: A B737-800 air crew upon receipt of a descent clearance; pressed the 'ALT INTV' button. In doing so the first altitude constraint was deleted and they crossed it 1;000 feet low.

Narrative: I was the pilot monitoring and we were cleared to descend via the Arrival into ZZZ. The bottom altitude is 10;000 feet which was set properly. The 'ALT INTV' button was pressed once the clearance was received which I believe cancelled the first altitude constraint of Fix ZZZZZ at or above FL240. We ended up crossing Fix ZZZZZ approximately 1;000 feet low. The rest of the crossing altitudes were all made without incident and we landed safely. The center controller did not say anything. Active pilot monitoring would prevent this from happening in the future. I will pay closer attention to each altitude when climbing or descending from now on.

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.

A B737-800 air crew upon receipt of a descent clearance; pressed the 'altitude intv' button. In doing so the first altitude constraint was deleted and they crossed it 1;000 feet low.