|37000 Feet||Browse and search NASA's
Aviation Safety Reporting System
|Local Time Of Day||0601 To 1200|
|Locale Reference||atc facility : lhy|
|Altitude||msl bound lower : 35000|
msl bound upper : 35000
|Controlling Facilities||artcc : zny|
|Operator||common carrier : air carrier|
|Make Model Name||Large Transport, Low Wing, 3 Turbojet Eng|
|Navigation In Use||other vortac|
|Flight Phase||cruise other|
|Route In Use||enroute airway : j36|
enroute airway : j223
|Affiliation||company : air carrier|
|Function||flight crew : first officer|
|Qualification||pilot : commercial|
pilot : atp
pilot : instrument
|Experience||flight time last 90 days : 210|
flight time total : 7500
flight time type : 1500
|Function||controller : radar|
|Qualification||controller : radar|
|Anomaly||other spatial deviation|
|Independent Detector||other controllera|
|Resolutory Action||controller : issued new clearance|
|Primary Problem||Navigational Facility|
|Air Traffic Incident||other|
While navigating northwest on J36 about 70-80 mi west of lake henry (lhy 110.8) center called us right (north) of course and gave a steer to dunkirk (dkk 116.2). Our CDI showed on course at 7000' and drifting left (south) after that which we corrected for. In listening to a follow on discussion with an air carrier Q and air carrier right. They had the same problem. The ATC controller reports it as a daily occurrence. The problem is that with even just a 4 NM drift to the north, one comes very close to traffic on J223 out of elmira. Everyone's airborne navaids show them on course but lhy's signal is unreliable after 50-60 mi or so. Suggest that this route be checked and an earlier changeover point (now none is designated, therefore changeover is half way) be established and/or adjust J36.
Original NASA ASRS Text
Title: ACR LGT TRACK DEVIATION CAUSES ENCROACHMENT ON ADJACENT PARALLEL AIRWAY. ZNY ARTCC RADAR CTLR SAYS IT'S A DAILY OCCURRENCE.
Narrative: WHILE NAVIGATING NW ON J36 ABOUT 70-80 MI W OF LAKE HENRY (LHY 110.8) CENTER CALLED US RIGHT (N) OF COURSE AND GAVE A STEER TO DUNKIRK (DKK 116.2). OUR CDI SHOWED ON COURSE AT 7000' AND DRIFTING LEFT (S) AFTER THAT WHICH WE CORRECTED FOR. IN LISTENING TO A FOLLOW ON DISCUSSION WITH AN ACR Q AND ACR R. THEY HAD THE SAME PROB. THE ATC CTLR RPTS IT AS A DAILY OCCURRENCE. THE PROB IS THAT WITH EVEN JUST A 4 NM DRIFT TO THE N, ONE COMES VERY CLOSE TO TFC ON J223 OUT OF ELMIRA. EVERYONE'S AIRBORNE NAVAIDS SHOW THEM ON COURSE BUT LHY'S SIGNAL IS UNRELIABLE AFTER 50-60 MI OR SO. SUGGEST THAT THIS ROUTE BE CHKED AND AN EARLIER CHANGEOVER POINT (NOW NONE IS DESIGNATED, THEREFORE CHANGEOVER IS HALF WAY) BE ESTABLISHED AND/OR ADJUST J36.
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.