An S80 PIC's report on a track deviation possibly caused by a passenger ped device creating electronic magnetic interference (EMI) while 20 NM from cyyz, on.

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Attributes
ACN	465251
Time
Date	200003
Day	Mon
Local Time Of Day	1201 To 1800
Place
State Reference	ON
Altitude	msl single value : 10000
Environment
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	MD-80 Super 80
Operating Under FAR Part	Part 121
Flight Phase	descent : vacating altitude
Route In Use	arrival : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	465251
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument pilot : multi engine
Events
Anomaly	aircraft equipment problem : less severe cabin event : passenger electronic device inflight encounter other non adherence : company policies other spatial deviation
Independent Detector	aircraft equipment other aircraft equipment : vor - cdi
Resolutory Action	aircraft : equipment problem dissipated controller : issued new clearance
Supplementary
Problem Areas	Passenger Human Performance Cabin Crew Human Performance Aircraft
Primary Problem	Passenger Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Location: cyyc/20 DME. 132 degree radial to yyc VOR, not certain of distance from fix, but inside of vucan. Approach control stated we were slightly left of course. CDI was centered on correct course to correct VOR yyc. Approach control gave us a 10 degree heading change to the right due possible traffic. Very shortly after, approach control gave us a vector further right. As we started this turn, the CDI broke loose and showed us about 3 degrees left of course. This event was shortly after the 10000 ft chime. Could have had interference from some electronic device from the cabin. Continued with vectors for remainder of arrival to uneventful landing. We checked our navaids 2 times after approach controller initially advised us. We thought we were right on course.

Original NASA ASRS Text

Title: AN S80 PIC'S RPT ON A TRACK DEV POSSIBLY CAUSED BY A PAX PED DEVICE CREATING ELECTRONIC MAGNETIC INTERFERENCE (EMI) WHILE 20 NM FROM CYYZ, ON.

Narrative: LOCATION: CYYC/20 DME. 132 DEG RADIAL TO YYC VOR, NOT CERTAIN OF DISTANCE FROM FIX, BUT INSIDE OF VUCAN. APCH CTL STATED WE WERE SLIGHTLY L OF COURSE. CDI WAS CTRED ON CORRECT COURSE TO CORRECT VOR YYC. APCH CTL GAVE US A 10 DEG HDG CHANGE TO THE R DUE POSSIBLE TFC. VERY SHORTLY AFTER, APCH CTL GAVE US A VECTOR FURTHER R. AS WE STARTED THIS TURN, THE CDI BROKE LOOSE AND SHOWED US ABOUT 3 DEGS L OF COURSE. THIS EVENT WAS SHORTLY AFTER THE 10000 FT CHIME. COULD HAVE HAD INTERFERENCE FROM SOME ELECTRONIC DEVICE FROM THE CABIN. CONTINUED WITH VECTORS FOR REMAINDER OF ARR TO UNEVENTFUL LNDG. WE CHKED OUR NAVAIDS 2 TIMES AFTER APCH CTLR INITIALLY ADVISED US. WE THOUGHT WE WERE RIGHT ON COURSE.

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.