GA small aircraft uunath of special use airspace.

Attributes
ACN	179313
Time
Date	199105
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : 2v2
State Reference	CO
Altitude	agl bound lower : 700 agl bound upper : 700
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : personal
Make Model Name	Small Aircraft, High Wing, 1 Eng, Fixed Gear
Flight Phase	cruise other cruise other other
Route In Use	approach : visual
Flight Plan	None
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : cfi pilot : commercial
Experience	flight time last 90 days : 120 flight time total : 2100 flight time type : 300
ASRS Report	179313
Person 2
Affiliation	government : faa
Function	other personnel other
Qualification	other
Events
Anomaly	conflict : airborne less severe other spatial deviation conflict : ground less severe
Independent Detector	other flight crewa
Resolutory Action	none taken : insufficient time
Consequence	Other
Miss Distance	horizontal : 1000 vertical : 1000
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

After obtaining a WX briefing the night before for a flight to longmont airport from aurora airpark in a vintage small transport taildragger, I was informed that an aerobatic contest would begin at xx:00 the next day. However, the airport would not be closed. No mention was made of changes to the traffic pattern. However, I did not ask for NOTAMS. Next morning WX was cavu and winds were light. The flight to longmont went normally. Approaching longmont, I checked for other traffic and checked the segmented circle to see if traffic was left-hand, and left traffic was indicated. I made a midfield crosswind entry to the pattern. I then noticed an aircraft doing aerobatics about 1000' above and 1/8-1/4 mi to the right. There was no close conflict, and I made a tight left pattern and landed, at which pint I found out that I had almost flown through the aerobatic box. My aircraft has no radio, so I did not receive a field advisory. For events such as these, where the pattern has been changed, a temporary modification of the segmented circle would be helpful. Also, although I should have asked for NOTAMS, it would have been helpful for the FSS briefed to volunteer the NOTAM on the temporary pattern change during the WX brief the night before.

Original NASA ASRS Text

Title: GA SMA UUNATH OF SPECIAL USE AIRSPACE.

Narrative: AFTER OBTAINING A WX BRIEFING THE NIGHT BEFORE FOR A FLT TO LONGMONT ARPT FROM AURORA AIRPARK IN A VINTAGE SMT TAILDRAGGER, I WAS INFORMED THAT AN AEROBATIC CONTEST WOULD BEGIN AT XX:00 THE NEXT DAY. HOWEVER, THE ARPT WOULD NOT BE CLOSED. NO MENTION WAS MADE OF CHANGES TO THE TFC PATTERN. HOWEVER, I DID NOT ASK FOR NOTAMS. NEXT MORNING WX WAS CAVU AND WINDS WERE LIGHT. THE FLT TO LONGMONT WENT NORMALLY. APCHING LONGMONT, I CHKED FOR OTHER TFC AND CHKED THE SEGMENTED CIRCLE TO SEE IF TFC WAS LEFT-HAND, AND LEFT TFC WAS INDICATED. I MADE A MIDFIELD XWIND ENTRY TO THE PATTERN. I THEN NOTICED AN ACFT DOING AEROBATICS ABOUT 1000' ABOVE AND 1/8-1/4 MI TO THE RIGHT. THERE WAS NO CLOSE CONFLICT, AND I MADE A TIGHT LEFT PATTERN AND LANDED, AT WHICH PINT I FOUND OUT THAT I HAD ALMOST FLOWN THROUGH THE AEROBATIC BOX. MY ACFT HAS NO RADIO, SO I DID NOT RECEIVE A FIELD ADVISORY. FOR EVENTS SUCH AS THESE, WHERE THE PATTERN HAS BEEN CHANGED, A TEMPORARY MODIFICATION OF THE SEGMENTED CIRCLE WOULD BE HELPFUL. ALSO, ALTHOUGH I SHOULD HAVE ASKED FOR NOTAMS, IT WOULD HAVE BEEN HELPFUL FOR THE FSS BRIEFED TO VOLUNTEER THE NOTAM ON THE TEMPORARY PATTERN CHANGE DURING THE WX BRIEF THE NIGHT BEFORE.

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.