Narrative:

While descending into dfw on the BRDJE3 we missed a crossing restriction at tusle. It was the captain's leg so I was the pilot monitoring (pm). We were at 34;000 feet and given a descent to 24;000 feet. I set the altitude in the window and the captain pushed for des mode and the airplane started down. Not long after starting our descent we got an automatic flight FCU 1 fault ECAM and the captain then pulled for open descent. The captain said he'll fly the airplane and I run the ECAM. I ran the ECAM then got out the QRH.while I was looking in the QRH; ATC told us descend via the arrival. I can't remember who set 11;000 feet; one of us did; but we both verified it. I went back heads down and continued with the checklist. There was a reset in the checklist; which I ran; and it cleared the fault. ECAM complete; screens normal. The captain then asked for me to send a maintenance report message (mrm). I pulled up the page; typed in the ECAM message in the comment section the first time and it came back in error. I then tried [again] on the next one along with a description again in the comment section. I made a few typing errors and I tried to backspace; but if you hit backspace more than twice it erases the entire line. Pretty annoying and I kept fumbling around with it. The captain was watching me and giving me his input on how to do it also; so that added to the confusion. I haven't done too many [reports] before and both the captain and I thought it would be just like sending in a write up along with a location. This all took about 4-5 minutes and the next thing I know the captain is talking to ATC and we are climbing back up to 17;000 feet. The whole time we were in open descent and we weren't even close to where we were supposed to be; 8;000 feet low. ATC said no problem; make the next crossing at 17;000 feet then continue via. Continued without further incident.

Related reports:

Google
 

Original NASA ASRS Text

Title: A319 flight crew reported altitude deviation due to distraction from flying duties during arrival.

Narrative: While descending into DFW on the BRDJE3 we missed a crossing restriction at TUSLE. It was the Captain's leg so I was the Pilot Monitoring (PM). We were at 34;000 feet and given a descent to 24;000 feet. I set the altitude in the window and the Captain pushed for DES mode and the airplane started down. Not long after starting our descent we got an AUTO FLIGHT FCU 1 Fault ECAM and the Captain then pulled for open descent. The Captain said he'll fly the airplane and I run the ECAM. I ran the ECAM then got out the QRH.While I was looking in the QRH; ATC told us descend via the arrival. I can't remember who set 11;000 feet; one of us did; but we both verified it. I went back heads down and continued with the checklist. There was a reset in the checklist; which I ran; and it cleared the fault. ECAM complete; screens normal. The Captain then asked for me to send a Maintenance Report Message (MRM). I pulled up the page; typed in the ECAM message in the comment section the first time and it came back in error. I then tried [again] on the next one along with a description again in the comment section. I made a few typing errors and I tried to backspace; but if you hit backspace more than twice it erases the entire line. Pretty annoying and I kept fumbling around with it. The Captain was watching me and giving me his input on how to do it also; so that added to the confusion. I haven't done too many [reports] before and both the Captain and I thought it would be just like sending in a write up along with a location. This all took about 4-5 minutes and the next thing I know the Captain is talking to ATC and we are climbing back up to 17;000 feet. The whole time we were in open descent and we weren't even close to where we were supposed to be; 8;000 feet low. ATC said no problem; make the next crossing at 17;000 feet then continue via. Continued without further incident.

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.