An air carrier on an ILS runway 22R approach claims that the localizer indicator did not agree with the LNAV track. The LNAV indicated that the aircraft was right of course while the localizer showed the aircraft left of course. The flight crew subsequently acquired the airport visually and landed without further problems. The tower controller stated that the runway 4L localizer was still on.

Home

Browse by month

Random

Latest

About

Contact

Attributes
ACN	377050
Time
Date	199708
Day	Wed
Local Time Of Day	0001 To 0600
Place
Locale Reference	airport : ewr
State Reference	NJ
Altitude	msl bound lower : 3000 msl bound upper : 3000
Environment
Flight Conditions	VMC
Light	Dawn
Aircraft 1
Controlling Facilities	tracon : n90
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	descent : approach
Route In Use	arrival other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 240 flight time total : 11500 flight time type : 350
ASRS Report	377050
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	other anomaly other other spatial deviation
Independent Detector	other flight crewa
Resolutory Action	flight crew : returned to intended course or assigned course none taken : detected after the fact
Consequence	Other
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	other

Narrative:

During final approach to runway 22R after delay vectored onto the ILS, localizer indicator did not agree with LNAV track. LNAV showed us right of course with localizer showing us left. Was able to acquire airport visually and land. Tower said that the runway 4L localizer was also still engaged which may have contributed to the problem.

Original NASA ASRS Text

Title: AN ACR ON AN ILS RWY 22R APCH CLAIMS THAT THE LOC INDICATOR DID NOT AGREE WITH THE LNAV TRACK. THE LNAV INDICATED THAT THE ACFT WAS R OF COURSE WHILE THE LOC SHOWED THE ACFT L OF COURSE. THE FLC SUBSEQUENTLY ACQUIRED THE ARPT VISUALLY AND LANDED WITHOUT FURTHER PROBS. THE TWR CTLR STATED THAT THE RWY 4L LOC WAS STILL ON.

Narrative: DURING FINAL APCH TO RWY 22R AFTER DELAY VECTORED ONTO THE ILS, LOC INDICATOR DID NOT AGREE WITH LNAV TRACK. LNAV SHOWED US R OF COURSE WITH LOC SHOWING US L. WAS ABLE TO ACQUIRE ARPT VISUALLY AND LAND. TWR SAID THAT THE RWY 4L LOC WAS ALSO STILL ENGAGED WHICH MAY HAVE CONTRIBUTED TO THE PROB.

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.