A decathlon pilot may have penetrated the class C airspace without talking to ATC.

Attributes
ACN	520460
Time
Date	200108
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : mbs.airport
State Reference	MI
Altitude	msl single value : 4000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : personal
Make Model Name	Decathlon
Flight Phase	climbout : intermediate altitude
Flight Plan	None
Person 1
Affiliation	other
Function	flight crew : single pilot
Qualification	pilot : commercial pilot : multi engine pilot : instrument pilot : cfi
Experience	flight time last 90 days : 15 flight time total : 4800 flight time type : 345
ASRS Report	520460
Events
Anomaly	airspace violation : entry non adherence : far other anomaly other
Resolutory Action	none taken : detected after the fact
Supplementary
Problem Areas	Chart Or Publication Airspace Structure Airport Flight Crew Human Performance ATC Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

Upon climb out from uncontrolled airport (3BW) outside the TRSA, climb was continued to 4000 ft MSL on the northwest edge of the TRSA, then exited immediately to the west (TRSA floor is at 3000 ft). (The decathlon climbs rapidly.) since I arrived at 3BS from the north, the presence of the TRSA wasn't a factor then, and I forgot about it momentarily when leaving the next day. No other aircraft were seen. If I did intrude on the TRSA without clearance, as appears likely, there was at least no apparent safety compromise in the clear but bumpy air. Information reminder prominently posted at the airport or even at the runway locations would have prevented this.

Original NASA ASRS Text

Title: A DECATHLON PLT MAY HAVE PENETRATED THE CLASS C AIRSPACE WITHOUT TALKING TO ATC.

Narrative: UPON CLBOUT FROM UNCTLED ARPT (3BW) OUTSIDE THE TRSA, CLB WAS CONTINUED TO 4000 FT MSL ON THE NW EDGE OF THE TRSA, THEN EXITED IMMEDIATELY TO THE W (TRSA FLOOR IS AT 3000 FT). (THE DECATHLON CLBS RAPIDLY.) SINCE I ARRIVED AT 3BS FROM THE N, THE PRESENCE OF THE TRSA WASN'T A FACTOR THEN, AND I FORGOT ABOUT IT MOMENTARILY WHEN LEAVING THE NEXT DAY. NO OTHER ACFT WERE SEEN. IF I DID INTRUDE ON THE TRSA WITHOUT CLRNC, AS APPEARS LIKELY, THERE WAS AT LEAST NO APPARENT SAFETY COMPROMISE IN THE CLR BUT BUMPY AIR. INFO REMINDER PROMINENTLY POSTED AT THE ARPT OR EVEN AT THE RWY LOCATIONS WOULD HAVE PREVENTED THIS.

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.