Air carrier pilot voiced concern regarding ATC's late runway assignment changes while on the riivr S...

Narrative:

Getting very tired of lax ATC giving re-routes (from runway 25L to runway 24R) over grahm intersection on the riivr approach. I don't mind the sequencing; but how about a little notice? How about 20 miles before grahm? Executing the new routing as the airplane is descending and turning over grahm is not safe. Burying our heads in the FMC and trying to complete checklists and brief a new approach that late in the game is not safe. It creates an unneccesary workload increase at a very bad time and is happening far too often in la.

Original NASA ASRS Text

Title: Air carrier pilot voiced concern regarding ATC's late runway assignment changes while on the RIIVR STAR to LAX; claiming changes increase workload and create a safety issue.

Narrative: Getting very tired of LAX ATC giving re-routes (from Runway 25L to Runway 24R) over GRAHM intersection on the RIIVR approach. I don't mind the sequencing; but how about a little notice? How about 20 miles before GRAHM? Executing the new routing as the airplane is descending and turning over GRAHM is not safe. Burying our heads in the FMC and trying to complete checklists and brief a new approach that late in the game is not safe. It creates an unneccesary workload increase at a very bad time and is happening far too often in LA.

Data retrieved from NASA's ASRS site as of April 2012 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.

Attributes
ACN	858644
Time
Date	200909
Local Time Of Day	0001-0600
Place
Locale Reference	LAX.Airport
State Reference	CA
Aircraft 1
Make Model Name	B757-200
Operating Under FAR Part	Part 121
Flight Phase	Descent
Route In Use	STAR RIIVR
Flight Plan	IFR
Person 1
Function	First Officer Pilot Not Flying
Events
Anomaly	ATC Issue All Types

Air carrier pilot voiced concern regarding ATC's late runway assignment changes while on the riivr STAR to lax; claiming changes increase workload and create a safety issue.