<< >> NASA ASRS Report 581173, May 2003

GPWS warning causes a departure hawker 800XP flight crew at 5000 ft, to climb, thereby creating a traffic conflict with unknown traffic at 6000 ft, 23 northwest of lax.

Attributes
ACN	581173
Time
Date	200305
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	navaid : lax.vortac
State Reference	CA
Altitude	msl bound lower : 5000 msl bound upper : 6000
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : sct.tracon tower : sat.tower
Operator	general aviation : corporate
Make Model Name	BAe 125 Series 800
Operating Under FAR Part	Part 91
Flight Phase	cruise : enroute altitude change
Route In Use	arrival : on vectors
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tracon : sct.tracon
Operator	general aviation : corporate
Make Model Name	Cessna Citation Undifferentiated or Other Model
Operating Under FAR Part	Part 91
Flight Phase	cruise : level
Flight Plan	IFR
Person 1
Affiliation	company : corporate
Function	flight crew : first officer oversight : pic
Qualification	pilot : atp pilot : multi engine
Experience	flight time last 90 days : 95 flight time total : 4800 flight time type : 300
ASRS Report	581173
Person 2
Affiliation	company : corporate
Function	flight crew : captain
Qualification	pilot : atp
Experience	flight time last 90 days : 45 flight time total : 20000 flight time type : 45
ASRS Report	581565
Events
Anomaly	aircraft equipment problem : critical altitude deviation : excursion from assigned altitude conflict : airborne critical non adherence : clearance non adherence : required legal separation other anomaly other other spatial deviation
Independent Detector	aircraft equipment : tcas
Resolutory Action	flight crew : took evasive action flight crew : returned to assigned altitude other
Consequence	faa : reviewed incident with flight crew
Supplementary
Problem Areas	Flight Crew Human Performance Airspace Structure Aircraft ATC Human Performance
Primary Problem	Aircraft

Narrative:

While cruising at 5000 ft MSL northwest of lax, we received a GPWS terrain warning and a command to pull up. I directed my sic, who was flying in the left seat, to climb at the same time he started pulling up. A few seconds later, we received an RA on traffic with an advisory to descend. I took control of the jet, and pushed over to a slow descent, since the GPWS warning ceased. We peaked out at approximately 6000 ft MSL. Shortly thereafter, the RA ceased, and I descended back to 5000 ft. I notified ATC (socal approach), and subsequent recovery was uneventful.

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Original NASA ASRS Text

Title: GPWS WARNING CAUSES A DEP HAWKER 800XP FLT CREW AT 5000 FT, TO CLB, THEREBY CREATING A TFC CONFLICT WITH UNKNOWN TFC AT 6000 FT, 23 NW OF LAX.

Narrative: WHILE CRUISING AT 5000 FT MSL NW OF LAX, WE RECEIVED A GPWS TERRAIN WARNING AND A COMMAND TO PULL UP. I DIRECTED MY SIC, WHO WAS FLYING IN THE L SEAT, TO CLB AT THE SAME TIME HE STARTED PULLING UP. A FEW SECONDS LATER, WE RECEIVED AN RA ON TFC WITH AN ADVISORY TO DSND. I TOOK CTL OF THE JET, AND PUSHED OVER TO A SLOW DSCNT, SINCE THE GPWS WARNING CEASED. WE PEAKED OUT AT APPROX 6000 FT MSL. SHORTLY THEREAFTER, THE RA CEASED, AND I DSNDED BACK TO 5000 FT. I NOTIFIED ATC (SOCAL APCH), AND SUBSEQUENT RECOVERY WAS UNEVENTFUL.

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.