EMB ERJ 170/175 ER/LR
Flight Crew Air Transport Pilot (ATP)
Flight Crew Type 11000
Distraction; Workload
ATC Issue All Types; Deviation - Altitude Crossing Restriction Not Met; Deviation - Altitude Overshoot; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy
Air Traffic Control Issued Advisory / Alert; Air Traffic Control Issued New Clearance; Flight Crew Became Reoriented; Flight Crew Returned To Clearance
Human Factors; Procedure
We were given a STAR change; followed by a runway change; followed by an approach choice with two speed assignments all within a short time frame. We agreed to the localizer Runway 27L. During the approach; workload was high and I also had to contact ops and the make the FAs announcement. I had TAFFS at 2200 ft. The mandatory intermediate step downs never registered in my head; although clearly visible on the chart. I was below 7000. The controller mentioned this and told me to maintain 6000 until RIPPR and pointed out the crossing restrictions. Segregate tasks internally. Do one thing at a time; pause; do the next thing.
Was cleared for the Localizer approach for runway 27L (If my memory serves me right) and did not comply with the step down procedures. Was supposed to be at 6000 feet at RIPPR but instead was at a lower altitude. ATC then issued a new altitude assignment and recleared us for the approach. When cleared; the altitude bug was set to the final approach fix altitude and FPA (Flight Path Angle) was selected for the descent mode. I failed to catch this mistake because I'm so used to shooting a full ILS approach and simply forgot that this is a LOC approach and not an ILS approach. Confusion and task satiation also played a critical role. Was given multiple changes throughout the descent. First; we got a new STAR; then a new runway; and finally a new approach. But I make no excuses! I should've caught the mistake. We are a team up there. Cross check and verify the approach you are shooting. Make sure the runway is correct and the approach is correct.
EMB175 flight crew reported being task saturated with multiple changes to the ORD approach that resulted in an altitude deviation.