B737NG first officer reported an altitude deviation resulted when the FMC was improperly set up for ...

Attributes
ACN	1562489
Time
Date	201807
Local Time Of Day	0601-1200
Place
Locale Reference	DEN.Airport
State Reference	CO
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	B737 Next Generation Undifferentiated
Operating Under FAR Part	Part 121
Flight Phase	Final Approach
Flight Plan	IFR
Person 1
Function	First Officer Pilot Not Flying
Qualification	Flight Crew Multiengine Flight Crew Instrument Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Type 2828.12
Events
Anomaly	ATC Issue All Types Deviation - Altitude Undershoot Deviation - Altitude Crossing Restriction Not Met Deviation - Procedural Published Material / Policy Deviation - Procedural Clearance

Narrative:

I was the pilot monitoring (pm) when we received a late change to our expected approach into denver. We were expecting the ILS 34R and we were given a last minute change to the RNAV (rnp) Z 34R. I was busy on the radio and monitoring our descent while the captain loaded the FMC. The captain stated the approach was 'in the box' and proceeded to disable the DME and VOR's. He also changed the rnp value. He gave a quick brief and we verified that the airplane was set up properly (ie LNAV VNAV and we were in VNAV path). Everything checked out but we missed one thing. We didn't connect the himom fix above the discontinuity. So the aircraft never descended like we expected. ATC queried us and realized we were too high for the approach. He canceled our approach and gave us vectors. We got down and shot a visual approach. No traffic conflict was created. The rest of our approach was uneventful.

Original NASA ASRS Text

Title: B737NG First Officer reported an altitude deviation resulted when the FMC was improperly set up for the RNAV (RN) Z approach to 34R in DEN. Reporter stated a last minute change to the clearance contributed to the event.

Narrative: I was the Pilot Monitoring (PM) when we received a late change to our expected approach into Denver. We were expecting the ILS 34R and we were given a last minute change to the RNAV (RNP) Z 34R. I was busy on the radio and monitoring our descent while the Captain loaded the FMC. The Captain stated the approach was 'in the box' and proceeded to disable the DME and VOR's. He also changed the RNP value. He gave a quick brief and we verified that the airplane was set up properly (ie LNAV VNAV and we were in VNAV PATH). Everything checked out but we missed one thing. We didn't connect the HIMOM fix above the discontinuity. So the aircraft never descended like we expected. ATC queried us and realized we were too high for the approach. He canceled our approach and gave us vectors. We got down and shot a visual approach. No traffic conflict was created. The rest of our approach was uneventful.

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.

B737NG first officer reported an altitude deviation resulted when the FMC was improperly set up for the RNAV (rn) Z approach to 34R in den. Reporter stated a last minute change to the clearance contributed to the event.