Small transport enters TCA without clearance while trying to avoid.

Attributes
ACN	244497
Time
Date	199306
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : iad
State Reference	VA
Altitude	msl bound lower : 5500 msl bound upper : 5500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : iad
Operator	general aviation : personal
Make Model Name	Small Transport
Flight Phase	cruise other
Route In Use	enroute : direct
Flight Plan	None
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : atp pilot : flight engineer
Experience	flight time last 90 days : 150 flight time total : 12000 flight time type : 15
ASRS Report	244497
Events
Anomaly	non adherence : far other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : unable
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Same old story. I assumed the course that I had set into the LORAN would keep us well clear of the washington TCA. However, I was off by about 3-5 mi of what our actual ground track was. Before I caught the error we had entered the TCA by about 5 mi. If I would have double-checked our ground track or just been a little more diligent I would have seen how close we were getting to dulles. Also a TCA chart would have helped, all I had was a sectional.

Original NASA ASRS Text

Title: SMT ENTERS TCA WITHOUT CLRNC WHILE TRYING TO AVOID.

Narrative: SAME OLD STORY. I ASSUMED THE COURSE THAT I HAD SET INTO THE LORAN WOULD KEEP US WELL CLR OF THE WASHINGTON TCA. HOWEVER, I WAS OFF BY ABOUT 3-5 MI OF WHAT OUR ACTUAL GND TRACK WAS. BEFORE I CAUGHT THE ERROR WE HAD ENTERED THE TCA BY ABOUT 5 MI. IF I WOULD HAVE DOUBLE-CHKED OUR GND TRACK OR JUST BEEN A LITTLE MORE DILIGENT I WOULD HAVE SEEN HOW CLOSE WE WERE GETTING TO DULLES. ALSO A TCA CHART WOULD HAVE HELPED, ALL I HAD WAS A SECTIONAL.

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.