Narrative:

Descending on the freedom 4 STAR into dca. 3rd and last leg of the day. We had briefed the STAR and were calling out the altitude windows to meet before each fix. As we approached approximately 15 NM to wewil and were at 15500 ft I called out to cross it at or above 14000 ft. First officer acknowledged and said roger. After that point we both became distracted and missed the restriction. I noticed that we were not yet at wewil and the aircraft was at 13400 ft. I called it out and the first officer took the flight controls and corrected with pitch and power temporarily climbing a little bit; back to 13700 ish. We crossed wewil and continued on the descent; ATC issued us a new frequency and we became busy from there on the arrival. ATC never called us on the descent about being too low. Landed without further problems. Main threats were potomac approach airspace and night time operations with a complex opd STAR. Errors were my failure to stay focused on the aircraft until pitch and power was corrected such that I could be assured that the fix altitude wouldn't be busted. Uas (undesired aircraft state) was the aircraft being underneath the floor of altitude at the wewil fix. Be more proactive on the flight deck and not allow my attention to be distracted from a threat without setting a reminder.

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Original NASA ASRS Text

Title: EMB-145LR Captain reported overshooting an altitude restriction on the Freedom 4 STAR into DCA; citing the OPD complex procedure as contributing.

Narrative: Descending on the Freedom 4 STAR into DCA. 3rd and last leg of the day. We had briefed the STAR and were calling out the altitude windows to meet before each fix. As we approached approximately 15 NM to WEWIL and were at 15500 ft I called out to cross it at or above 14000 ft. First Officer acknowledged and said roger. After that point we both became distracted and missed the restriction. I noticed that we were not yet at WEWIL and the aircraft was at 13400 ft. I called it out and the First Officer took the flight controls and corrected with pitch and power temporarily climbing a little bit; back to 13700 ish. We crossed WEWIL and continued on the descent; ATC issued us a new frequency and we became busy from there on the arrival. ATC never called us on the descent about being too low. Landed without further problems. Main threats were Potomac Approach airspace and night time operations with a complex OPD STAR. Errors were my failure to stay focused on the aircraft until pitch and power was corrected such that I could be assured that the fix altitude wouldn't be busted. UAS (undesired aircraft state) was the aircraft being underneath the floor of altitude at the WEWIL fix. Be more proactive on the flight deck and not allow my attention to be distracted from a threat without setting a reminder.

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.