A B737-800 crew flying the riivr 2 arrival set 1;900 ft in the MCP altitude for the runway 25L FAF; ...

Attributes
ACN	1122443
Time
Date	201310
Local Time Of Day	0001-0600
Place
Locale Reference	SCT.TRACON
State Reference	CA
Environment
Light	Night
Aircraft 1
Make Model Name	B737-800
Operating Under FAR Part	Part 121
Flight Phase	Initial Approach
Route In Use	STAR RIIVR2
Flight Plan	IFR
Component
Aircraft Component	Transponder
Person 1
Function	Pilot Not Flying Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Person 2
Function	Pilot Flying First Officer
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Altitude Crossing Restriction Not Met Deviation - Procedural Clearance Deviation - Procedural Published Material / Policy

Narrative:

We were radar vectored; then cleared direct gramm riivr 2 arrival to 25L ILS and instructed to hold 300 KTS. We set up VNAV path set 1;900 ft in altitude window of mode control panel (MCP). Approaching luvyn ATC ordered a slow down to 250 KTS. The first officer who was pilot flying deployed speedbrakes and did not think we were slowing fast enough and shallowing our descent fast enough so he selected vertical speed on mode control and slowed sink to slow to 250 KTS. At approximately the same time we had a TCAS fail message on the nd and transponder fail light on the transponder unit. These warning lights help distract me the captain and pilot not flying at a critical time. We still had 1;900 ft set in the altitude window on the mode control panel from the VNAV path descent for FAF limma. We should have set 10;000 ft in the altitude window for krain once we left VNAV path but failed to do it in time resulting in us going below the 10;000 ft crossing restriction at krain. We corrected back to the path and continued the approach and landing without further problem.

Original NASA ASRS Text

Title: A B737-800 crew flying the RIIVR 2 arrival set 1;900 FT in the MCP ALT for the Runway 25L FAF; then selected VS to begin slowing to 250 KTS at 10;000 FT but became distracted and forgot to re-select VNAV. They descended to 8;500 FT before KRAIN.

Narrative: We were radar vectored; then cleared direct GRAMM RIIVR 2 arrival to 25L ILS and instructed to hold 300 KTS. We set up VNAV Path set 1;900 FT in ALT window of Mode Control Panel (MCP). Approaching LUVYN ATC ordered a slow down to 250 KTS. The First Officer who was Pilot Flying deployed speedbrakes and did not think we were slowing fast enough and shallowing our descent fast enough so he selected vertical speed on mode control and slowed sink to slow to 250 KTS. At approximately the same time we had a TCAS FAIL MSG on the ND and XPONDER FAIL LIGHT on the transponder unit. These warning lights help distract me the Captain and Pilot Not Flying at a critical time. We still had 1;900 FT set in the ALT window on the Mode Control Panel from the VNAV path descent for FAF LIMMA. We should have set 10;000 FT in the ALT window for KRAIN once we left VNAV path but failed to do it in time resulting in us going below the 10;000 FT crossing restriction at KRAIN. We corrected back to the path and continued the approach and landing without further problem.

Data retrieved from NASA's ASRS site as of July 2013 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.

A B737-800 crew flying the riivr 2 arrival set 1;900 ft in the MCP altitude for the runway 25L FAF; then selected vs to begin slowing to 250 KTS at 10;000 ft but became distracted and forgot to re-select VNAV. They descended to 8;500 ft before krain.