Air carrier large transport with stuck course deviation indicator incurs a track deviation.

Attributes
ACN	93618
Time
Date	198809
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : eno
State Reference	DE
Altitude	msl bound lower : 10000 msl bound upper : 10000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : pou
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	cruise other
Route In Use	arrival star : star enroute airway : zdc
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Experience	flight time last 90 days : 90 flight time total : 6400
ASRS Report	93618
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 240 flight time total : 10000
ASRS Report	93534
Events
Anomaly	aircraft equipment problem : less severe non adherence : clearance other spatial deviation
Independent Detector	other controllera
Resolutory Action	flight crew : returned to intended course or assigned course
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	Pilot Deviation

Narrative:

On dupont #2 arrival to phl. Flying the 226 degree radial of kenton. Had the 195 degree radial of dupont set on the opposite navigation radio. Controller advised we were east of the radial we were to intercept. Upon tapping on the face of the course indicator, the C.I. Abruptly moved full scale to the left. Obviously the controller was correct, and the course indicator had been stuck. Turned left and intercepted the 195 degree radial of dupont.

Original NASA ASRS Text

Title: ACR LGT WITH STUCK COURSE DEVIATION INDICATOR INCURS A TRACK DEVIATION.

Narrative: ON DUPONT #2 ARR TO PHL. FLYING THE 226 DEG RADIAL OF KENTON. HAD THE 195 DEG RADIAL OF DUPONT SET ON THE OPPOSITE NAV RADIO. CTLR ADVISED WE WERE E OF THE RADIAL WE WERE TO INTERCEPT. UPON TAPPING ON THE FACE OF THE COURSE INDICATOR, THE C.I. ABRUPTLY MOVED FULL SCALE TO THE L. OBVIOUSLY THE CTLR WAS CORRECT, AND THE COURSE INDICATOR HAD BEEN STUCK. TURNED L AND INTERCEPTED THE 195 DEG RADIAL OF DUPONT.

Data retrieved from NASA's ASRS site as of August 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.