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Instructor pilot of C172 apparently entered dc ADIZ when he failed to note his directional gyro had precessed at least 80 degrees.
| Attributes | |
| ACN | 616758 |
| Time | |
| Date | 200405 |
| Day | Sat |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | navaid : emi.vortac |
| State Reference | MD |
| Altitude | agl single value : 1500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : nhk.tracon |
| Operator | general aviation : instructional |
| Make Model Name | Skyhawk 172/Cutlass 172 |
| Operating Under FAR Part | Part 91 |
| Navigation In Use | other vortac |
| Flight Phase | cruise : level |
| Route In Use | enroute : direct |
| Flight Plan | None |
| Person 1 | |
| Affiliation | other |
| Function | instruction : instructor |
| Qualification | pilot : cfi pilot : commercial pilot : instrument |
| Experience | flight time last 90 days : 5 flight time total : 1300 flight time type : 700 |
| ASRS Report | 616758 |
| Person 2 | |
| Affiliation | other |
| Function | instruction : trainee |
| Events | |
| Anomaly | airspace violation : entry non adherence : far non adherence : published procedure |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : exited penetrated airspace |
| Supplementary | |
| Problem Areas | Airspace Structure Aircraft Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
| Situations | |
| Airspace Structure | special use : dcadiz.othersua |
Narrative:
I was conducting a sightseeing flight for my employer I was flying due west off the fdk VOR on the 270 degree radial. Additionally, I was tracking off of the EMI VOR. The last chkpoint that was the furthest point south of the flight was finksburg, md, at which point I began to fly west towards fdk. While flying wbound, I noticed that the directional gyro had precessed 80 degrees, causing my flight to have drifted into a southwest direction. Upon discovering the precession, I corrected the directional gyro and continued the flight on course. If it is found that I was in fact in the dc ADIZ, then it was completely accidental. As a flight instructor operating nearby the dc ADIZ and P-40, I am always staying current on the changes and conditions of these airspaces. I believe that if the directional gyro had not been precessing so rapidly, this possible situation would not have occurred.
Original NASA ASRS Text
Title: INSTRUCTOR PLT OF C172 APPARENTLY ENTERED DC ADIZ WHEN HE FAILED TO NOTE HIS DIRECTIONAL GYRO HAD PRECESSED AT LEAST 80 DEGS.
Narrative: I WAS CONDUCTING A SIGHTSEEING FLT FOR MY EMPLOYER I WAS FLYING DUE W OFF THE FDK VOR ON THE 270 DEG RADIAL. ADDITIONALLY, I WAS TRACKING OFF OF THE EMI VOR. THE LAST CHKPOINT THAT WAS THE FURTHEST POINT S OF THE FLT WAS FINKSBURG, MD, AT WHICH POINT I BEGAN TO FLY W TOWARDS FDK. WHILE FLYING WBOUND, I NOTICED THAT THE DIRECTIONAL GYRO HAD PRECESSED 80 DEGS, CAUSING MY FLT TO HAVE DRIFTED INTO A SW DIRECTION. UPON DISCOVERING THE PRECESSION, I CORRECTED THE DIRECTIONAL GYRO AND CONTINUED THE FLT ON COURSE. IF IT IS FOUND THAT I WAS IN FACT IN THE DC ADIZ, THEN IT WAS COMPLETELY ACCIDENTAL. AS A FLT INSTRUCTOR OPERATING NEARBY THE DC ADIZ AND P-40, I AM ALWAYS STAYING CURRENT ON THE CHANGES AND CONDITIONS OF THESE AIRSPACES. I BELIEVE THAT IF THE DIRECTIONAL GYRO HAD NOT BEEN PRECESSING SO RAPIDLY, THIS POSSIBLE SIT WOULD NOT HAVE 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.