Pilot of an small aircraft aircraft penetrated TCA.

Attributes
ACN	251641
Time
Date	199309
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : sql
State Reference	CA
Altitude	msl bound lower : 4000 msl bound upper : 4000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : oak
Operator	general aviation : personal
Make Model Name	Small Aircraft, Low Wing, 1 Eng, Retractable Gear
Flight Phase	cruise other
Flight Plan	VFR
Aircraft 2
Operator	other
Make Model Name	Military Transport
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : instrument pilot : commercial
Experience	flight time last 90 days : 75 flight time total : 1500 flight time type : 200
ASRS Report	251641
Person 2
Affiliation	government : military
Function	flight crew : captain oversight : pic
Qualification	pilot : military
Events
Anomaly	aircraft equipment problem : less severe conflict : airborne less severe non adherence : far other anomaly other
Independent Detector	atc equipment other atc equipment : unspecified other controllera
Resolutory Action	flight crew : exited penetrated airspace flight crew : took evasive action
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 4000 vertical : 100
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

While on a pleasure flight in a high performance sport plane (small aircraft), noticed an mlt aircraft sub detection plane climbing out of moffett NAS at my 8 O'clock position and approaching my altitude, about 3/4 mi away. I checked my position and altitude quickly and noticed I was right at the floor of the sfo TCA in that area, which is 4000 ft. I was heading out to a commonly used practice area, where the base of the TCA is 6000 ft. I was close to that point when it changed but not there yet, so I turned to a course that was the quickest away from the path of the mlt and descended quickly to 3800 ft and continued on my flight. On landing later, I was asked to call tower. I explained the above, and also explained I have had intermittent trouble with my mode C encoder and was working with the factory to get it repaired permanently or replaced. The tower said my mode C appeared inoperative. Fix: I will fly lower with a working mode C.

Original NASA ASRS Text

Title: PLT OF AN SMA ACFT PENETRATED TCA.

Narrative: WHILE ON A PLEASURE FLT IN A HIGH PERFORMANCE SPORT PLANE (SMA), NOTICED AN MLT ACFT SUB DETECTION PLANE CLBING OUT OF MOFFETT NAS AT MY 8 O'CLOCK POS AND APCHING MY ALT, ABOUT 3/4 MI AWAY. I CHKED MY POS AND ALT QUICKLY AND NOTICED I WAS RIGHT AT THE FLOOR OF THE SFO TCA IN THAT AREA, WHICH IS 4000 FT. I WAS HDG OUT TO A COMMONLY USED PRACTICE AREA, WHERE THE BASE OF THE TCA IS 6000 FT. I WAS CLOSE TO THAT POINT WHEN IT CHANGED BUT NOT THERE YET, SO I TURNED TO A COURSE THAT WAS THE QUICKEST AWAY FROM THE PATH OF THE MLT AND DSNDED QUICKLY TO 3800 FT AND CONTINUED ON MY FLT. ON LNDG LATER, I WAS ASKED TO CALL TWR. I EXPLAINED THE ABOVE, AND ALSO EXPLAINED I HAVE HAD INTERMITTENT TROUBLE WITH MY MODE C ENCODER AND WAS WORKING WITH THE FACTORY TO GET IT REPAIRED PERMANENTLY OR REPLACED. THE TWR SAID MY MODE C APPEARED INOP. FIX: I WILL FLY LOWER WITH A WORKING MODE C.

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.