B737-700
Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 209; Flight Crew Type 12000
Human-Machine Interface; Distraction; Communication Breakdown
Aircraft Equipment Problem Critical; Deviation - Altitude Crossing Restriction Not Met; Deviation - Altitude Undershoot; Deviation / Discrepancy - Procedural Clearance
Flight Crew Became Reoriented; Flight Crew Returned To Clearance
Human Factors; Aircraft
We were descending on JESEY RNAV Arrival into PIT and had been given CUTTA at 10;000 feet. We had programmed 28R into the FMC and the aircraft was descending in VNAV PATH and on profile. Winds aloft were loaded in Descent Forecast page. Approaching CUTTA; ATC changed our runway to 32. This requires re-loading the runway because 28R and 32 have different paths after KIRKK. Both of us pulled out the 32 approach plate and got it loaded in the FMC. Somewhere in this sequence of events; the aircraft ['s FMS mode] changed to SPEED and went high on profile. We were at 261 knots so I told the First Officer (Pilot Flying) to increase descent rate to make CUTTA at 10;000 feet. He pushed the nose over and made a good effort at recapturing PATH; but we ended up 800 feet high over CUTTA.[To prevent this in the future;] whenever the runway or the approach is changed; one pilot must continue monitoring the progress. Once one of the pilots has retrieved the necessary charts; he can resume monitoring. Also; not sure what caused the aircraft to come out of PATH but may have been higher than forecast winds during descent. This time of year winds are stronger and the descent page must be monitored.
Distracted while reprogramming their landing runway from 28 to 32 as they were descending into PIT on the JESEY RNAV STAR and cleared cross CUTTA at 10;000; the flight crew of a B737NG failed to note their autoflight mode had reverted from VNAV to speed and their rate of descent had decreased commensurately.  They crossed CUTTA 800 feet high.