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Cessna 310 pilot inadvertently entered the expanded tfr of prohibited airspace 40 due to the inaccuracies of VOR navigation radials.
| Attributes | |
| ACN | 533856 |
| Time | |
| Date | 200112 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | msl single value : 11500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Dusk |
| Aircraft 1 | |
| Controlling Facilities | tracon : zzz.tracon |
| Operator | general aviation : personal |
| Make Model Name | Cessna 310/T310C |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise : level |
| Flight Plan | None |
| Person 1 | |
| Affiliation | other |
| Function | flight crew : single pilot |
| Qualification | pilot : multi engine pilot : instrument pilot : commercial |
| Experience | flight time last 90 days : 25 flight time total : 2360 flight time type : 170 |
| ASRS Report | 533856 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Events | |
| Anomaly | airspace violation : entry non adherence : far |
| Independent Detector | other controllera |
| Resolutory Action | flight crew : exited penetrated airspace none taken : detected after the fact |
| Consequence | faa : investigated |
| Supplementary | |
| Problem Areas | Chart Or Publication Airspace Structure Flight Crew Human Performance |
| Primary Problem | Airspace Structure |
| Air Traffic Incident | Pilot Deviation |
Narrative:
While en route from ZZZ1 to ZZZ2, I navigated to avoid the P40 tfr (expanded to 8 NM radius by NOTAM) by using VOR area navigation. My eastbound route of flight followed a path defined by points of intersection of two VORTAC stations. I flew this route precisely, which should have resulted in no incursion into the expanded P40 tfr, passing to the north of the area. However, owing to inaccuracies in the VOR system (plus or minus 40 and greater under some circumstances), it is possible that a penetration occurred.
Original NASA ASRS Text
Title: CESSNA 310 PLT INADVERTENTLY ENTERED THE EXPANDED TFR OF PROHIBITED AIRSPACE 40 DUE TO THE INACCURACIES OF VOR NAVIGATION RADIALS.
Narrative: WHILE ENRTE FROM ZZZ1 TO ZZZ2, I NAVIGATED TO AVOID THE P40 TFR (EXPANDED TO 8 NM RADIUS BY NOTAM) BY USING VOR AREA NAVIGATION. MY EBOUND RTE OF FLT FOLLOWED A PATH DEFINED BY POINTS OF INTERSECTION OF TWO VORTAC STATIONS. I FLEW THIS RTE PRECISELY, WHICH SHOULD HAVE RESULTED IN NO INCURSION INTO THE EXPANDED P40 TFR, PASSING TO THE N OF THE AREA. HOWEVER, OWING TO INACCURACIES IN THE VOR SYSTEM (PLUS OR MINUS 40 AND GREATER UNDER SOME CIRCUMSTANCES), IT IS POSSIBLE THAT A PENETRATION OCCURRED.
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.