Suspected violation of TCA.

Attributes
ACN	82023
Time
Date	198802
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : las
State Reference	NV
Altitude	msl bound lower : 7500 msl bound upper : 17500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zla tracon : las
Operator	common carrier : air carrier
Make Model Name	Small Transport, Low Wing, 2 Turboprop Eng
Flight Phase	cruise other descent other
Route In Use	enroute : direct
Flight Plan	None
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : cfi pilot : commercial pilot : instrument
Experience	flight time last 90 days : 98 flight time total : 3128 flight time type : 345
ASRS Report	82023
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : commercial pilot : atp
Experience	flight time last 90 days : 210 flight time total : 3270 flight time type : 1200
ASRS Report	82014
Events
Anomaly	other anomaly other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	other

Narrative:

We were on a ferry flight from paso robles, ca, to st george, ut, receiving VFR advisories from la center. Over boulder city we were terminated by center and told to squawk 1200. The captain started a descent out of 17500' towards hoover dam and stopped the descent around 9000' which is the top of las TCA. We aren't absolutely sure if we stopped before reaching 9000'. We then climbed to 9500' and continued to the east. About 20-25 mi east of las we descended to 7500'. I am reporting this because I'm not absolutely sure if we dropped below 9000'and if we were clear to the east before descending to 7500'. This situation could have been avoided by paying more attention to position, altitude, and relation to airspace. When flying on instrument flight plans all of the time, I never have to worry about staying clear of TCA's or other types of airspace.

Original NASA ASRS Text

Title: SUSPECTED VIOLATION OF TCA.

Narrative: WE WERE ON A FERRY FLT FROM PASO ROBLES, CA, TO ST GEORGE, UT, RECEIVING VFR ADVISORIES FROM LA CENTER. OVER BOULDER CITY WE WERE TERMINATED BY CENTER AND TOLD TO SQUAWK 1200. THE CAPT STARTED A DSCNT OUT OF 17500' TOWARDS HOOVER DAM AND STOPPED THE DSCNT AROUND 9000' WHICH IS THE TOP OF LAS TCA. WE AREN'T ABSOLUTELY SURE IF WE STOPPED BEFORE REACHING 9000'. WE THEN CLBED TO 9500' AND CONTINUED TO THE E. ABOUT 20-25 MI E OF LAS WE DSNDED TO 7500'. I AM RPTING THIS BECAUSE I'M NOT ABSOLUTELY SURE IF WE DROPPED BELOW 9000'AND IF WE WERE CLR TO THE E BEFORE DSNDING TO 7500'. THIS SITUATION COULD HAVE BEEN AVOIDED BY PAYING MORE ATTN TO POS, ALT, AND RELATION TO AIRSPACE. WHEN FLYING ON INSTRUMENT FLT PLANS ALL OF THE TIME, I NEVER HAVE TO WORRY ABOUT STAYING CLR OF TCA'S OR OTHER TYPES OF AIRSPACE.

Data retrieved from NASA's ASRS site as of August 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.