Small aircraft overshot turn onto ILS.

Attributes
ACN	96996
Time
Date	198810
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : lax
State Reference	CA
Altitude	msl bound lower : 3500 msl bound upper : 3500
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : lax
Operator	general aviation : personal
Make Model Name	Small Aircraft, Low Wing, 1 Eng, Retractable Gear
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : commercial pilot : instrument
Experience	flight time last 90 days : 100 flight time total : 700 flight time type : 100
ASRS Report	96996
Person 2
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
Events
Anomaly	aircraft equipment problem : critical non adherence : published procedure non adherence : clearance other spatial deviation
Independent Detector	other controllera other flight crewa
Resolutory Action	flight crew : became reoriented
Consequence	faa : reviewed incident with flight crew
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	Pilot Deviation

Narrative:

Was on IFR flight from myf in san diego to lax. Assigned runway 25L. Given radar vectors to intercept localizer at 3500' MSL. Conditions were bases 1500', tops 3500'. Did so and localizer needle stayed 'too centered for too long.' therefore, tapped obs and got a full right deflection. Immediately began turn to right and set #2 navigation to localizer frequency as a backup. Overshot course and found myself apparently north of course, with conflicting needles between #1 and #2 navs. Approach advised me first that I was south of course, then later that I was north of course. Eventually, upon encountering VMC, corrected to south and made an uneventful landing on 25L. Telephoned la approach and spoke to a very courteous but concerned supervisor who told me what they had seen on their radar screen. On return trip, no problems with navs in VFR conditions. Checked ILS myf and no problem with either navigation. Will consider purchasing new radios as these are old and have required bench testing in past. Callback conversation with reporter revealed the following. Reporter was instructed to call TRACON after landing. They said that there had been no conflicts, adding that if there had, the phone call would have been more than a polite chat. Reporter is having all new radios installed at time of callback.

Original NASA ASRS Text

Title: SMA OVERSHOT TURN ONTO ILS.

Narrative: WAS ON IFR FLT FROM MYF IN SAN DIEGO TO LAX. ASSIGNED RWY 25L. GIVEN RADAR VECTORS TO INTERCEPT LOC AT 3500' MSL. CONDITIONS WERE BASES 1500', TOPS 3500'. DID SO AND LOC NEEDLE STAYED 'TOO CENTERED FOR TOO LONG.' THEREFORE, TAPPED OBS AND GOT A FULL RIGHT DEFLECTION. IMMEDIATELY BEGAN TURN TO RIGHT AND SET #2 NAV TO LOC FREQ AS A BACKUP. OVERSHOT COURSE AND FOUND MYSELF APPARENTLY N OF COURSE, WITH CONFLICTING NEEDLES BTWN #1 AND #2 NAVS. APCH ADVISED ME FIRST THAT I WAS S OF COURSE, THEN LATER THAT I WAS N OF COURSE. EVENTUALLY, UPON ENCOUNTERING VMC, CORRECTED TO S AND MADE AN UNEVENTFUL LNDG ON 25L. TELEPHONED LA APCH AND SPOKE TO A VERY COURTEOUS BUT CONCERNED SUPVR WHO TOLD ME WHAT THEY HAD SEEN ON THEIR RADAR SCREEN. ON RETURN TRIP, NO PROBS WITH NAVS IN VFR CONDITIONS. CHKED ILS MYF AND NO PROB WITH EITHER NAV. WILL CONSIDER PURCHASING NEW RADIOS AS THESE ARE OLD AND HAVE REQUIRED BENCH TESTING IN PAST. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING. RPTR WAS INSTRUCTED TO CALL TRACON AFTER LNDG. THEY SAID THAT THERE HAD BEEN NO CONFLICTS, ADDING THAT IF THERE HAD, THE PHONE CALL WOULD HAVE BEEN MORE THAN A POLITE CHAT. RPTR IS HAVING ALL NEW RADIOS INSTALLED AT TIME OF CALLBACK.

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.