<< >> NASA ASRS Report 865813, December 2009

A B737 descending on the slc delta 3 arrival descended below the spiek crossing restriction altitude and was issued a terrain warning by ATC.

Attributes
ACN	865813
Time
Date	200912
Local Time Of Day	0601-1200
Place
Locale Reference	SLC.Airport
State Reference	UT
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Make Model Name	B737-300
Operating Under FAR Part	Part 121
Flight Phase	Descent
Route In Use	STAR DELTA 3
Flight Plan	IFR
Component
Aircraft Component	MCP
Person 1
Function	Pilot Not Flying First Officer
Experience	Flight Crew Last 90 Days 298 Flight Crew Type 3800
Person 2
Function	Captain Pilot Flying
Experience	Flight Crew Last 90 Days 202 Flight Crew Type 10150
Events
Anomaly	Deviation - Altitude Overshoot Deviation - Procedural Clearance Inflight Event / Encounter CFTT / CFIT

Narrative:

During the arrival into salt lake city after leveling at 17;000 ft and 280 KTS at jammn; we were given a late descent clearance by ATC. The clearance was to descend via the delta 3 arrival. The captain initiated an increased vertical speed descent to recapture the VNAV path due to the 1000 ft high indication on the FMC. The MCP window was not amended to 13;000 ft at spiek since it appeared that we would easily make that restriction due to the late descent. During this period of time we were given a runway change and; in an attempt to descend; meet the crossing restriction on speed and altitude; as well as brief the new approach; the flight crew leveled off 1000 ft below the restriction at spiek (i.e. 12;000 feet). The crew was alerted to a terrain warning by ATC and immediately initiated a climb back to 13;000 ft. The remainder of the arrival was uneventful.

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Original NASA ASRS Text

Title: A B737 descending on the SLC DELTA 3 arrival descended below the SPIEK crossing restriction altitude and was issued a terrain warning by ATC.

Narrative: During the arrival into Salt Lake City after leveling at 17;000 FT and 280 KTS at JAMMN; we were given a late descent clearance by ATC. The clearance was to descend via the DELTA 3 arrival. The Captain initiated an increased vertical speed descent to recapture the VNAV path due to the 1000 FT high indication on the FMC. The MCP window was not amended to 13;000 FT at SPIEK since it appeared that we would easily make that restriction due to the late descent. During this period of time we were given a runway change and; in an attempt to descend; meet the crossing restriction on speed and altitude; as well as brief the new approach; the flight crew leveled off 1000 FT below the restriction at SPIEK (i.e. 12;000 feet). The crew was alerted to a terrain warning by ATC and immediately initiated a climb back to 13;000 FT. The remainder of the arrival was uneventful.

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.