Missed approach due to erratic localizer signal.

Attributes
ACN	131955
Time
Date	198912
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : pbi
State Reference	FL
Altitude	msl bound lower : 1600 msl bound upper : 1600
Environment
Flight Conditions	IMC
Light	Dusk
Aircraft 1
Controlling Facilities	tracon : pbi tower : ind
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	descent : approach landing : missed approach
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 5000 flight time type : 150
ASRS Report	131955
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	other anomaly other
Independent Detector	other controllera other flight crewa
Resolutory Action	none taken : unable other
Consequence	Other
Supplementary
Primary Problem	Ambiguous
Air Traffic Incident	other

Narrative:

While flying the localizer backcourse 27R at pbi, crew observed erratic localizer movements resulting in a missed approach. This crew member believes the erratic and unreliable localizer was caused by interference to the signal from an unknown source.

Original NASA ASRS Text

Title: MISSED APCH DUE TO ERRATIC LOCALIZER SIGNAL.

Narrative: WHILE FLYING THE LOC BACKCOURSE 27R AT PBI, CREW OBSERVED ERRATIC LOC MOVEMENTS RESULTING IN A MISSED APCH. THIS CREW MEMBER BELIEVES THE ERRATIC AND UNRELIABLE LOC WAS CAUSED BY INTERFERENCE TO THE SIGNAL FROM AN UNKNOWN SOURCE.

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.