Pilot is made aware after flight that a general, national security NOTAM had grounded all flight.

Attributes
ACN	524418
Time
Date	200109
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl bound lower : 1000 agl bound upper : 1100
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : zzz.tower artcc : zab.artcc
Operator	general aviation : personal
Make Model Name	Cessna 150
Operating Under FAR Part	Part 91
Flight Phase	cruise : level
Flight Plan	VFR
Person 1
Affiliation	other
Function	flight crew : single pilot
Qualification	pilot : private
Experience	flight time last 90 days : 15 flight time total : 1185 flight time type : 1100
ASRS Report	524418
Person 2
Affiliation	government : faa
Function	controller : local
Events
Anomaly	airspace violation : entry non adherence : far
Independent Detector	other flight crewa
Resolutory Action	none taken : detected after the fact
Consequence	faa : investigated
Supplementary
Problem Areas	Environmental Factor Airspace Structure Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Unaware NOTAM was issued grounding all general aviation aircraft. Violation was inadvertent and not deliberate.

Original NASA ASRS Text

Title: PLT IS MADE AWARE AFTER FLT THAT A GENERAL, NATIONAL SECURITY NOTAM HAD GROUNDED ALL FLT.

Narrative: UNAWARE NOTAM WAS ISSUED GROUNDING ALL GENERAL AVIATION AIRCRAFT. VIOLATION WAS INADVERTENT AND NOT DELIBERATE.

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.