Unauthorized penetration of airspace.

Attributes
ACN	179942
Time
Date	199105
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : oak airport : hwd
State Reference	CA
Altitude	msl bound lower : 6000 msl bound upper : 6000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : oak tower : phl
Operator	general aviation : personal
Make Model Name	Small Aircraft
Flight Phase	cruise other
Route In Use	enroute : direct
Flight Plan	VFR
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : private pilot : instrument
Experience	flight time last 90 days : 21 flight time total : 3300 flight time type : 2500
ASRS Report	179942
Person 2
Affiliation	government : faa
Function	controller : ground
Qualification	controller : non radar
Events
Anomaly	non adherence : far other anomaly other other anomaly other
Independent Detector	other controllera
Resolutory Action	none taken : detected after the fact
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Departed hwd for bfl at about xy:15 local time, 5/fri/91. I normally depart from oak utilizing bay departure. I did not switch to bay after the hwd departure, and I was unaware of any problems until I was asked to call bay TRACON collect when I arrived at bfl. The phone # I was given at bfl was not correct. (I did read back the # to the ground controller for confirmation.) when I phoned and was advised that the # was in service, I realized that I had been given the wrong area code. I did not try the call again. The reason for this report is that it is possible that I may have entered the sfo TCA near mison intersection. I did not see any other aircraft. I was squawking 1200 mode C. If I did in fact enter the TCA, it might have been avoided by either utilizing a VFR terminal area chart, or resetting the dg, which had precessed to the point that I was flying a heading of 125 degrees instead of 110 degrees. A change in normal procedures, combined with an error in my dg may have caused me to deviate into the TCA.

Original NASA ASRS Text

Title: UNAUTH PENETRATION OF AIRSPACE.

Narrative: DEPARTED HWD FOR BFL AT ABOUT XY:15 LCL TIME, 5/FRI/91. I NORMALLY DEPART FROM OAK UTILIZING BAY DEP. I DID NOT SWITCH TO BAY AFTER THE HWD DEP, AND I WAS UNAWARE OF ANY PROBS UNTIL I WAS ASKED TO CALL BAY TRACON COLLECT WHEN I ARRIVED AT BFL. THE PHONE # I WAS GIVEN AT BFL WAS NOT CORRECT. (I DID READ BACK THE # TO THE GND CTLR FOR CONFIRMATION.) WHEN I PHONED AND WAS ADVISED THAT THE # WAS IN SVC, I REALIZED THAT I HAD BEEN GIVEN THE WRONG AREA CODE. I DID NOT TRY THE CALL AGAIN. THE REASON FOR THIS RPT IS THAT IT IS POSSIBLE THAT I MAY HAVE ENTERED THE SFO TCA NEAR MISON INTXN. I DID NOT SEE ANY OTHER ACFT. I WAS SQUAWKING 1200 MODE C. IF I DID IN FACT ENTER THE TCA, IT MIGHT HAVE BEEN AVOIDED BY EITHER UTILIZING A VFR TERMINAL AREA CHART, OR RESETTING THE DG, WHICH HAD PRECESSED TO THE POINT THAT I WAS FLYING A HDG OF 125 DEGS INSTEAD OF 110 DEGS. A CHANGE IN NORMAL PROCS, COMBINED WITH AN ERROR IN MY DG MAY HAVE CAUSED ME TO DEVIATE INTO THE TCA.

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.