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Pilot of a cpr sel small aircraft inadvertently penetrated class B airspace during a flight under the outer perimeter of class B airspace. A problem with reporter's GPS navigation receiver caused him to penetrate before tuning the VOR DME for alternate navigation.
| Attributes | |
| ACN | 421661 |
| Time | |
| Date | 199812 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : den airport : bjc |
| State Reference | CO |
| Altitude | msl bound lower : 7500 msl bound upper : 7500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : cdg |
| Operator | general aviation : corporate |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise other |
| Route In Use | enroute : direct |
| Flight Plan | None |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : single pilot |
| Qualification | pilot : cfi |
| Experience | flight time last 90 days : 102 flight time total : 3270 flight time type : 700 |
| ASRS Report | 421661 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Events | |
| Anomaly | aircraft equipment problem : less severe non adherence : far other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : insufficient time |
| Consequence | Other |
| Supplementary | |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Problem: may have inadvertently violated controled airspace in and around class B terminal area. Contributing factors: 1) fatigue: over 7 flight hours that day, with a bad autoplt. Hand flying the trip takes a lot of energy. 2) reliance on GPS. Overdependence on the magic of direct GPS navigation. Too late in switching to VOR/DME information in terminal area. 3) complacency: flown this route many times and have become less vigilant because of its familiarity. 4) schedule pressure led me to chose a more direct routing near class B/D airspace. Not good judgement to reduce margin of safety to meet schedule. 5) GPS dropout just before problem, led to some delay in switching to conventional navigation data. See attached map.
Original NASA ASRS Text
Title: PLT OF A CPR SEL SMA INADVERTENTLY PENETRATED CLASS B AIRSPACE DURING A FLT UNDER THE OUTER PERIMETER OF CLASS B AIRSPACE. A PROB WITH RPTR'S GPS NAV RECEIVER CAUSED HIM TO PENETRATE BEFORE TUNING THE VOR DME FOR ALTERNATE NAV.
Narrative: PROB: MAY HAVE INADVERTENTLY VIOLATED CTLED AIRSPACE IN AND AROUND CLASS B TERMINAL AREA. CONTRIBUTING FACTORS: 1) FATIGUE: OVER 7 FLT HRS THAT DAY, WITH A BAD AUTOPLT. HAND FLYING THE TRIP TAKES A LOT OF ENERGY. 2) RELIANCE ON GPS. OVERDEPENDENCE ON THE MAGIC OF DIRECT GPS NAV. TOO LATE IN SWITCHING TO VOR/DME INFO IN TERMINAL AREA. 3) COMPLACENCY: FLOWN THIS RTE MANY TIMES AND HAVE BECOME LESS VIGILANT BECAUSE OF ITS FAMILIARITY. 4) SCHEDULE PRESSURE LED ME TO CHOSE A MORE DIRECT ROUTING NEAR CLASS B/D AIRSPACE. NOT GOOD JUDGEMENT TO REDUCE MARGIN OF SAFETY TO MEET SCHEDULE. 5) GPS DROPOUT JUST BEFORE PROB, LED TO SOME DELAY IN SWITCHING TO CONVENTIONAL NAV DATA. SEE ATTACHED MAP.
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.