Bell 206 pilot reported a tfr incursion when the tfr was extended beyond the planned time frame.

Attributes
ACN	1282414
Time
Date	201507
Local Time Of Day	0601-1200
Place
Locale Reference	BUR.Airport
State Reference	CA
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Jet/Long Ranger/206
Operating Under FAR Part	Part 91
Flight Phase	Cruise
Route In Use	None
Person 1
Function	Pilot Flying Single Pilot
Qualification	Flight Crew Commercial Flight Crew Flight Instructor
Experience	Flight Crew Last 90 Days 50 Flight Crew Total 12250 Flight Crew Type 50
Events
Anomaly	Airspace Violation All Types Deviation - Procedural Published Material / Policy

Narrative:

I conducted weather check and checked for tfr's on FAA website as part of my preflight planning. Departed the heliport for our daily local security patrol. After establishing 2 way radio communication with bur ATC; I was advised of a possible pilot deviation and given a phone number for ATC. Upon completion of my assigned flight; I contacted ATC via telephone. I passed on my contact information and certificate number. A possible tfr violation was mentioned and is being investigated.I was aware of a tfr in the area north of smo. This tfr was extended by 45 minutes while I was flying. At the time I checked tfr status; [the fdc] had dropped off the FAA website. Maybe it was in the process of being updated; I do not know. I have been using flight vector in the past; but I would suggest to use at least 2 or 3 sources when inquiring about tfr status to avoid problems of this nature.

Original NASA ASRS Text

Title: Bell 206 pilot reported a TFR incursion when the TFR was extended beyond the planned time frame.

Narrative: I conducted Weather Check and checked for TFR's on FAA website as part of my preflight planning. Departed the heliport for our daily local security patrol. After establishing 2 way radio communication with BUR ATC; I was advised of a possible pilot deviation and given a phone number for ATC. Upon completion of my assigned flight; I contacted ATC via telephone. I passed on my contact information and certificate number. A possible TFR violation was mentioned and is being investigated.I was aware of a TFR in the area North of SMO. This TFR was extended by 45 minutes while I was flying. At the time I checked TFR status; [the FDC] had dropped off the FAA website. Maybe it was in the process of being updated; I do not know. I have been using Flight Vector in the past; but I would suggest to use at least 2 or 3 sources when inquiring about TFR status to avoid problems of this nature.

Data retrieved from NASA's ASRS site 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.