Track deviation on departure from smo, ca. Clearance copied was not correct.

Attributes
ACN	491880
Time
Date	200011
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : smo.airport
Altitude	msl single value : 3000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : sct.tracon tower : smo.tower
Operator	general aviation : corporate
Make Model Name	Challenger Jet Undifferentiated or Other Model
Operating Under FAR Part	Part 91
Navigation In Use	other
Flight Phase	climbout : intermediate altitude
Route In Use	departure : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : corporate
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 60 flight time total : 9860 flight time type : 450
ASRS Report	491880
Person 2
Affiliation	company : corporate
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : instrument pilot : commercial
Events
Anomaly	non adherence : clearance non adherence : published procedure other spatial deviation
Independent Detector	other controllerb
Resolutory Action	controller : issued advisory controller : issued new clearance flight crew : returned to intended or assigned course
Supplementary
Problem Areas	Flight Crew Human Performance ATC Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Received IFR clearance from smo ground control shortly before XA00 am. Wrote down and read back as follows ,cleared to rno via runway heading till intercepting lax 310 degree radial, then right turn to 350 degrees, vectors to intercept V23, shafter, as filed, climb and maintain 3000 ft, expect FL330 in 5 mins. Departure frequency 125.2, squawk XXXX.' we departed at approximately XA05 am and upon intercepting the lax 310 degree radial, turned to heading 350 degrees at 3000 ft MSL. As we turned, we were handed off to departure and they shortly thereafter asked us to say our heading. We responded '350 degrees' and were told we were supposed to be on heading 250 degrees. We then turned to correct heading of 250 degrees. This deviation was, I believe, due to my having copied 250 degrees as 350 degrees when receiving my clearance and the controller not correcting it when I read it back as 350 degrees. When I checked it on the chart, it looked reasonable to intercept V23 on a 350 degree heading. It seems to me that all procedures were correctly followed by all parties involved in the clearance delivery process, but due to either undetected radio interference or just 'mishearing,' errors crept in.

Original NASA ASRS Text

Title: TRACK DEV ON DEP FROM SMO, CA. CLRNC COPIED WAS NOT CORRECT.

Narrative: RECEIVED IFR CLRNC FROM SMO GND CTL SHORTLY BEFORE XA00 AM. WROTE DOWN AND READ BACK AS FOLLOWS ,CLRED TO RNO VIA RWY HEADING TILL INTERCEPTING LAX 310 DEG RADIAL, THEN R TURN TO 350 DEGS, VECTORS TO INTERCEPT V23, SHAFTER, AS FILED, CLB AND MAINTAIN 3000 FT, EXPECT FL330 IN 5 MINS. DEP FREQ 125.2, SQUAWK XXXX.' WE DEPARTED AT APPROX XA05 AM AND UPON INTERCEPTING THE LAX 310 DEG RADIAL, TURNED TO HEADING 350 DEGS AT 3000 FT MSL. AS WE TURNED, WE WERE HANDED OFF TO DEP AND THEY SHORTLY THEREAFTER ASKED US TO SAY OUR HEADING. WE RESPONDED '350 DEGS' AND WERE TOLD WE WERE SUPPOSED TO BE ON HEADING 250 DEGS. WE THEN TURNED TO CORRECT HEADING OF 250 DEGS. THIS DEV WAS, I BELIEVE, DUE TO MY HAVING COPIED 250 DEGS AS 350 DEGS WHEN RECEIVING MY CLRNC AND THE CTLR NOT CORRECTING IT WHEN I READ IT BACK AS 350 DEGS. WHEN I CHKED IT ON THE CHART, IT LOOKED REASONABLE TO INTERCEPT V23 ON A 350 DEG HDG. IT SEEMS TO ME THAT ALL PROCS WERE CORRECTLY FOLLOWED BY ALL PARTIES INVOLVED IN THE CLRNC DELIVERY PROCESS, BUT DUE TO EITHER UNDETECTED RADIO INTERFERENCE OR JUST 'MISHEARING,' ERRORS CREPT IN.

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.