An air carrier flight crew reported missing an altitude restriction on a published arrival.

Attributes
ACN	1370800
Time
Date	201607
Local Time Of Day	0601-1200
Place
Locale Reference	DAL.Airport
State Reference	TX
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Large Transport
Operating Under FAR Part	Part 121
Flight Phase	Descent
Route In Use	STAR BACHR4
Flight Plan	IFR
Person 1
Function	Captain Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 190
Person 2
Function	First Officer Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 133
Events
Anomaly	Deviation - Altitude Crossing Restriction Not Met Deviation - Altitude Undershoot Deviation - Procedural Published Material / Policy

Narrative:

Flying the BACHR4 arrival into dallas. We had briefed the arrival and were cleared to fly via and set 5000 feet in the altitude box. RNAV/VNAV path all the way to right before bgtex. I was looking outside for traffic when my first officer (first officer) said 'are we supposed to be at bgtex at 4000 feet?' I quickly looked down and saw 4000 feet at bgtex as a hard altitude!! I thought at first; I had misbriefed the arrival. I quickly put 4000 feet in the box and vertical speed to that altitude as we passed it. ATC switched us to another approach frequency and we checked in thinking we were in trouble? They said nothing about the altitude and vectored us to 13L for a visual. On the ground; we doubled checked and saw the lowest altitude was 5000 feet at bgtex. We were not sure if we had misread the box (both saw it) or if it was a navigational computer error. Either way; we should have been at 5000 feet; not 4000 feet at bgtex.

Original NASA ASRS Text

Title: An air carrier flight crew reported missing an altitude restriction on a published arrival.

Narrative: Flying the BACHR4 Arrival into Dallas. We had briefed the arrival and were cleared to fly via and set 5000 feet in the altitude box. RNAV/VNAV PATH all the way to right before BGTEX. I was looking outside for traffic when my First Officer (FO) said 'are we supposed to be at BGTEX at 4000 feet?' I quickly looked down and saw 4000 feet at BGTEX as a hard altitude!! I thought at first; I had misbriefed the arrival. I quickly put 4000 feet in the box and Vertical Speed to that altitude as we passed it. ATC switched us to another Approach frequency and we checked in thinking we were in trouble? They said nothing about the altitude and vectored us to 13L for a visual. On the ground; we doubled checked and saw the lowest altitude was 5000 feet at BGTEX. We were not sure if we had misread the box (both saw it) or if it was a navigational computer error. Either way; we should have been at 5000 feet; not 4000 feet at BGTEX.

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.