HS125 inbound to cma experienced GPWS while on published arrival procedure.

Attributes
ACN	586371
Time
Date	200306
Day	Mon
Local Time Of Day	1801 To 2400
Place
Locale Reference	intersection : sadde
State Reference	CA
Altitude	msl single value : 4000
Environment
Flight Conditions	Mixed
Light	Dusk
Aircraft 1
Controlling Facilities	tracon : ntd.tracon tower : cma.tower
Operator	general aviation : corporate
Make Model Name	BAe 125 Series 800
Operating Under FAR Part	Part 91
Navigation In Use	other
Flight Phase	descent : approach
Route In Use	approach : instrument precision arrival other arrival star : n/s
Flight Plan	IFR
Person 1
Affiliation	company : corporate
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : atp pilot : commercial pilot : flight engineer pilot : instrument
Experience	flight time last 90 days : 80 flight time total : 19560 flight time type : 430
ASRS Report	586371
Person 2
Affiliation	company : corporate
Function	flight crew : captain oversight : pic
Events
Anomaly	non adherence : published procedure non adherence other other anomaly other
Independent Detector	aircraft equipment : gpws other flight crewa
Resolutory Action	none taken : anomaly accepted
Supplementary
Problem Areas	Airspace Structure Flight Crew Human Performance Aircraft ATC Human Performance
Primary Problem	Aircraft

Narrative:

Established at 4000 ft on the published sadde transition to GPS 26 approach at cma airport, the GPWS activated 'terrain, terrain, pull up, pull up.' we had visual contact with the ridgeline below, so did not pull up. We assured passenger that all was ok, false warning. Airspeed was 200 KIAS steady. Suggest: transition altitude 4000 ft needs to be raised to prevent future terrain alerts. If solid IFR, pilot must pull up.

Original NASA ASRS Text

Title: HS125 INBOUND TO CMA EXPERIENCED GPWS WHILE ON PUBLISHED ARR PROC.

Narrative: ESTABLISHED AT 4000 FT ON THE PUBLISHED SADDE TRANSITION TO GPS 26 APCH AT CMA ARPT, THE GPWS ACTIVATED 'TERRAIN, TERRAIN, PULL UP, PULL UP.' WE HAD VISUAL CONTACT WITH THE RIDGELINE BELOW, SO DID NOT PULL UP. WE ASSURED PAX THAT ALL WAS OK, FALSE WARNING. AIRSPD WAS 200 KIAS STEADY. SUGGEST: TRANSITION ALT 4000 FT NEEDS TO BE RAISED TO PREVENT FUTURE TERRAIN ALERTS. IF SOLID IFR, PLT MUST PULL UP.

Data retrieved from NASA's ASRS site as of July 2007 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.