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Flight crew noted erratic indications on the course deviation indicator. When electronic games in the cabin were turned off the erratic indications stopped.
| Attributes | |
| ACN | 274861 |
| Time | |
| Date | 199406 |
| Day | Mon |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : bza |
| State Reference | CA |
| Altitude | msl bound lower : 33000 msl bound upper : 33000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zla |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise other |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : commercial pilot : instrument pilot : atp |
| Experience | flight time last 90 days : 250 flight time total : 15000 flight time type : 5000 |
| ASRS Report | 274861 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial |
| Events | |
| Anomaly | aircraft equipment problem : critical |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : overcame equipment problem |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
While in cruise flight, navigating by VOR on J2, we noticed that the course deviation indicator (CDI) was deflecting erratically. As this occurred there was not any associated off flag. The deviations were in both directions and in varying degrees. The aircraft was within 30 NM of the VOR, in clear air and there was not any lightning within 50 NM. I asked a flight attendant if anyone was using an electronic device onboard. She reported that a family was playing with 2 'gameboys' which were connected by a cord. They were seated in the first 2 rows of the cabin. After she relayed my request to turn off the devices to the passenger the disturbances ceased. Later smaller CDI deviations occurred and we found 1 gameboy in use, separately, without the connecting cord attached. The passenger were cooperative when asked, then, to turn off and put away the gameboys. After that no other like incidents were noted.
Original NASA ASRS Text
Title: FLC NOTED ERRATIC INDICATIONS ON THE COURSE DEV INDICATOR. WHEN ELECTRONIC GAMES IN THE CABIN WERE TURNED OFF THE ERRATIC INDICATIONS STOPPED.
Narrative: WHILE IN CRUISE FLT, NAVING BY VOR ON J2, WE NOTICED THAT THE COURSE DEV INDICATOR (CDI) WAS DEFLECTING ERRATICALLY. AS THIS OCCURRED THERE WAS NOT ANY ASSOCIATED OFF FLAG. THE DEVS WERE IN BOTH DIRECTIONS AND IN VARYING DEGS. THE ACFT WAS WITHIN 30 NM OF THE VOR, IN CLR AIR AND THERE WAS NOT ANY LIGHTNING WITHIN 50 NM. I ASKED A FLT ATTENDANT IF ANYONE WAS USING AN ELECTRONIC DEVICE ONBOARD. SHE RPTED THAT A FAMILY WAS PLAYING WITH 2 'GAMEBOYS' WHICH WERE CONNECTED BY A CORD. THEY WERE SEATED IN THE FIRST 2 ROWS OF THE CABIN. AFTER SHE RELAYED MY REQUEST TO TURN OFF THE DEVICES TO THE PAX THE DISTURBANCES CEASED. LATER SMALLER CDI DEVS OCCURRED AND WE FOUND 1 GAMEBOY IN USE, SEPARATELY, WITHOUT THE CONNECTING CORD ATTACHED. THE PAX WERE COOPERATIVE WHEN ASKED, THEN, TO TURN OFF AND PUT AWAY THE GAMEBOYS. AFTER THAT NO OTHER LIKE INCIDENTS WERE NOTED.
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.