A B767-200 flight crew experiences a map shift during their approach 12 mi east of lax, ca.

Attributes
ACN	452810
Time
Date	199910
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : lax.airport
State Reference	CA
Altitude	msl single value : 4000
Environment
Flight Conditions	Marginal
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : sct.tracon
Operator	common carrier : air carrier
Make Model Name	B767-200
Operating Under FAR Part	Part 121
Navigation In Use	ils localizer & glide slope : ns other
Flight Phase	descent : approach descent : intermediate altitude
Route In Use	approach : instrument precision
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : flight engineer pilot : atp pilot : cfi
Experience	flight time last 90 days : 175 flight time total : 19000 flight time type : 4700
ASRS Report	452280
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : multi engine pilot : commercial
Events
Anomaly	aircraft equipment problem : less severe non adherence : clearance non adherence : published procedure other spatial deviation
Independent Detector	other flight crewa
Resolutory Action	flight crew : returned to intended or assigned course
Consequence	other
Supplementary
Problem Areas	Aircraft Flight Crew Human Performance
Primary Problem	Aircraft
Air Traffic Incident	Pilot Deviation

Narrative:

Got map shift on HSI (EFIS). Got 1 mi north of localizer before correcting back south to localizer. Map eventually shifted 5 mi south and 5 mi west. Wrote up problem in aircraft logbook.

Original NASA ASRS Text

Title: A B767-200 FLC EXPERIENCES A MAP SHIFT DURING THEIR APCH 12 MI E OF LAX, CA.

Narrative: GOT MAP SHIFT ON HSI (EFIS). GOT 1 MI N OF LOC BEFORE CORRECTING BACK S TO LOC. MAP EVENTUALLY SHIFTED 5 MI S AND 5 MI W. WROTE UP PROB IN ACFT LOGBOOK.

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.