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An S80 PIC report on cell phone interference with VOR signals. The CDI was 'scalloping,' an indication of radio frequency interference.
| Attributes | |
| ACN | 398636 |
| Time | |
| Date | 199804 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : zjx |
| State Reference | FL |
| Altitude | msl bound lower : 37000 msl bound upper : 37000 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zjx |
| Operator | common carrier : air carrier |
| Make Model Name | MD-80 Super 80 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 398636 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Events | |
| Anomaly | aircraft equipment problem : less severe non adherence other other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified |
| Resolutory Action | flight crew : overcame equipment problem other |
| Consequence | Other |
| Supplementary | |
| Air Traffic Incident | other |
Narrative:
ATC facility: ZJX. Location: atlantic. At cruise we got several navigation deviation indications from the CDI. After having the flight attendants check for unauthorized electronic gear, I made a PA about turning off any cell phones that might be on but not transmitting. Shortly after that PA the navigation deviations stopped. The same thing occurred on flight lga-mia the previous night with the same PA and results. I suggest the passenger be more direct regarding cell phones that might be on but not in use.
Original NASA ASRS Text
Title: AN S80 PIC RPT ON CELL PHONE INTERFERENCE WITH VOR SIGNALS. THE CDI WAS 'SCALLOPING,' AN INDICATION OF RADIO FREQ INTERFERENCE.
Narrative: ATC FACILITY: ZJX. LOCATION: ATLANTIC. AT CRUISE WE GOT SEVERAL NAV DEV INDICATIONS FROM THE CDI. AFTER HAVING THE FLT ATTENDANTS CHK FOR UNAUTH ELECTRONIC GEAR, I MADE A PA ABOUT TURNING OFF ANY CELL PHONES THAT MIGHT BE ON BUT NOT XMITTING. SHORTLY AFTER THAT PA THE NAV DEVS STOPPED. THE SAME THING OCCURRED ON FLT LGA-MIA THE PREVIOUS NIGHT WITH THE SAME PA AND RESULTS. I SUGGEST THE PAX BE MORE DIRECT REGARDING CELL PHONES THAT MIGHT BE ON BUT NOT IN USE.
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.