B737-800 captain reported overshooting an altitude restriction on the RNAV rnp X approach to 22L at ...

Attributes
ACN	1579259
Time
Date	201809
Local Time Of Day	1801-2400
Place
Locale Reference	MDW.Airport
State Reference	IL
Environment
Light	Night
Aircraft 1
Make Model Name	B737-800
Operating Under FAR Part	Part 121
Flight Phase	Initial Approach
Flight Plan	IFR
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 485
Events
Anomaly	ATC Issue All Types Deviation - Altitude Crossing Restriction Not Met Deviation - Altitude Overshoot Deviation - Procedural Clearance Deviation - Procedural Published Material / Policy

Narrative:

On arrival into mdw in a 250 knot level change descent to 6000 ft; expecting RNAV (rnp)-Y runway 22L; we received a different approach to RNAV (rnp)-X runway 22L; cleared direct to miing to cross at 4000 ft cleared for the approach. After reprogramming the FMC; pilot flying put the next altitude on the approach 2900 ft into the MCP window but failed to select VNAV. The aircraft in level change descended 400 ft below the crossing altitude of 4000 ft approximately 5 NM west of the fix. Having to brief the new approach (task saturation) was put ahead of making sure the MCP was set up properly. Pilot flying should have had the pilot monitoring do the programming to allow the pilot flying time to see the bigger picture and make sure the proper MCP mode was set prior to briefing the new approach. Knowing ATC's intentions further out would be helpful.

Original NASA ASRS Text

Title: B737-800 Captain reported overshooting an altitude restriction on the RNAV RNP X Approach to 22L at MDW. Reporter cited a last minute clearance change as contributing.

Narrative: On arrival into MDW in a 250 knot Level Change descent to 6000 FT; expecting RNAV (RNP)-Y Runway 22L; we received a different approach to RNAV (RNP)-X Runway 22L; cleared direct to MIING to cross at 4000 FT cleared for the approach. After reprogramming the FMC; Pilot Flying put the next altitude on the approach 2900 FT into the MCP window but failed to select VNAV. The aircraft in Level Change descended 400 FT below the crossing altitude of 4000 FT approximately 5 NM west of the fix. Having to brief the new approach (task saturation) was put ahead of making sure the MCP was set up properly. Pilot Flying should have had the Pilot Monitoring do the programming to allow the Pilot Flying time to see the bigger picture and make sure the proper MCP mode was set prior to briefing the new approach. Knowing ATC's intentions further out would be helpful.

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.

B737-800 captain reported overshooting an altitude restriction on the RNAV rnp X approach to 22L at mdw. Reporter cited a last minute clearance change as contributing.