B757 flight crew reported crossing bysun high after runway assignment was changed three times on arr...

Attributes
ACN	1210787
Time
Date	201410
Local Time Of Day	0001-0600
Place
Locale Reference	IAH.Airport
State Reference	TX
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	B757 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Final Approach
Route In Use	STAR MSCOT
Flight Plan	IFR
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 240 Flight Crew Total 30000 Flight Crew Type 11000
Person 2
Function	Pilot Not Flying First Officer
Experience	Flight Crew Last 90 Days 240 Flight Crew Total 15000 Flight Crew Type 9000
Events
Anomaly	ATC Issue All Types Deviation - Altitude Crossing Restriction Not Met Deviation - Procedural Clearance

Narrative:

Descending into iah on the mscot arrival we were given three runway assignments; the last being runway 27. When we entered runway 27 into the FMC; the altitude dropped out at bysun intersection. We caught the omission; but crossed the fix approx 400 ft high.

Original NASA ASRS Text

Title: B757 flight crew reported crossing BYSUN high after runway assignment was changed three times on arrival to IAH.

Narrative: Descending into IAH on the MSCOT arrival we were given three runway assignments; the last being RWY 27. When we entered RWY 27 into the FMC; the altitude dropped out at BYSUN intersection. We caught the omission; but crossed the fix approx 400 FT high.

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.

B757 flight crew reported crossing bysun high after runway assignment was changed three times on arrival to iah.