Narrative:

After being cleared to descend via the STOCR2 RNAV opd arrival into clt; I set 9000 ft into the altitude selector and verified it with the pilot monitoring (pm) first officer (first officer). Passing doomy between 11000 ft and 9000 ft; I set 8000 ft into the altitude selector and verified it with the pm first officer. I incorrectly began a 1000 FPM descent to 8000 ft. At approximately 8600 ft; clt approach called us and told us to climb back to 9000 ft; as the profile called for us to maintain 9000 ft until leeks. We acknowledged the climb; and reset 9000 ft in the altitude selector; verified it; and climbed back to 9000 ft. Passing leeks at 9000 ft per the arrival; we descended to 8000 ft per the procedure and continued the rest of the arrival; approach; and landing on 18L. The biggest threat with this event was that due to enroute weather; we were filed and cleared for an east side arrival into clt. I had never flown the STOCR2 arrival or landed on 18L in clt before. Although we took the time to brief the arrival and approach and landing exit; this RNAV opd was unfamiliar to me. I honestly thought I was flying the procedure properly; and had even told the first officer that I was going to start my descent to 8000 ft at doomy; which was incorrect. It wasn't until ATC called us in the descent to 8000 ft that I realized my error. I believe the first officer was also unfamiliar with this arrival; as we usually get a west side arrival for 18R/36L. We simply missed the requirement to maintain 9000 ft until leeks. I am going to start delaying putting in the next lower altitude in the altitude selector (in this case 8000 ft) until after we cross the fix that permits the descent (in this case leeks); rather than right after capturing the higher altitude (in this case 9000 ft). I think that will help me to not descend prematurely.

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Original NASA ASRS Text

Title: CRJ-700 Captain reported an altitude deviation occurred on the STOCR2 RNAV OPD arrival to CLT. Reporter cited unfamiliarity with the procedure as contributing.

Narrative: After being cleared to descend via the STOCR2 RNAV OPD arrival into CLT; I set 9000 FT into the altitude selector and verified it with the Pilot Monitoring (PM) First Officer (FO). Passing DOOMY between 11000 FT and 9000 FT; I set 8000 FT into the altitude selector and verified it with the PM FO. I incorrectly began a 1000 FPM descent to 8000 FT. At approximately 8600 FT; CLT Approach called us and told us to climb back to 9000 FT; as the profile called for us to maintain 9000 FT until LEEKS. We acknowledged the climb; and reset 9000 FT in the altitude selector; verified it; and climbed back to 9000 FT. Passing LEEKS at 9000 FT per the arrival; we descended to 8000 FT per the procedure and continued the rest of the arrival; approach; and landing on 18L. The biggest threat with this event was that due to enroute weather; we were filed and cleared for an east side arrival into CLT. I had never flown the STOCR2 arrival or landed on 18L in CLT before. Although we took the time to brief the arrival and approach and landing exit; this RNAV OPD was unfamiliar to me. I honestly thought I was flying the procedure properly; and had even told the FO that I was going to start my descent to 8000 FT at DOOMY; which was incorrect. It wasn't until ATC called us in the descent to 8000 FT that I realized my error. I believe the FO was also unfamiliar with this arrival; as we usually get a west side arrival for 18R/36L. We simply missed the requirement to maintain 9000 FT until LEEKS. I am going to start delaying putting in the next lower altitude in the altitude selector (in this case 8000 FT) until after we cross the fix that permits the descent (in this case LEEKS); rather than right after capturing the higher altitude (in this case 9000 FT). I think that will help me to not descend prematurely.

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.