|37000 Feet||Browse and search NASA's
Aviation Safety Reporting System
|Local Time Of Day||0601 To 1200|
|Locale Reference||atc facility : oak|
|Controlling Facilities||artcc : zao|
|Operator||common carrier : air carrier|
|Make Model Name||Heavy Transport, Low Wing, 4 Turbojet Eng|
|Navigation In Use||other vortac|
|Flight Phase||cruise other|
|Route In Use||enroute : other oceanic|
enroute : pacific
|Affiliation||company : air carrier|
|Function||flight crew : captain|
oversight : pic
|Qualification||pilot : atp|
|Experience||flight time last 90 days : 230|
flight time total : 21040
flight time type : 1940
|Function||controller : radar|
|Qualification||controller : radar|
|Anomaly||aircraft equipment problem : less severe|
non adherence : clearance
other spatial deviation
|Independent Detector||other controllera|
|Resolutory Action||flight crew : returned to intended course or assigned course|
|Air Traffic Incident||other|
Initial flight plan was slc-J154-bam-J32-oak-bebop-R464-bitta-MAGGI2 - hnl. During climb out from slc I was cleared direct oak and after passing abeam sac I was cleared present position direct bebop. I checked both omega as against the oak VOR/DME on the 227 degree right 120 DME fix and both required no update. Approaching bebop I was informed by oak center that I was 12 miles left of course. Because both VOR DME readouts from the oak VORTAC showed me in the correct position, I asked the controller to check his radar. He informed me that he did, and he was adamant that I was on an incorrect course even though I informed him of my VOR/DME check. After several radar position checks from him, I accepted a radar fix and entered 36.35 north, 126.23 west as my present position in #1 omega. I then accepted radar vectors to intercept what he showed and what my #1 omega now showed as on track for R4640. #2 omega remained tuned as set before takeoff and checked inbound to oak. During the flight over-ocean I navigated directly by #1 omega with checks on cross track distance from #2 and logged each waypoint readout and cross track distance. After reporting bradr to oceanic control I was instructed to contact honolulu center. On first call up I was immediately informed that I was to the right of track by 10 miles and I then informed center that this was due to incorrect radar position reports from the oakland center controller. I was then cleared direct to kokohead. My #1 VOR was preselected to the mkk VORTAC for the initial leg of the maggi 1 arrival and I inadvertently homed to mkk. My divergence from a direct track to ckh was noted by the hnl center controller as I was correcting back, and I accepted a vector to intercept a specific radial to ckh. Omega readouts over ckh and on the ground at hnl showed the #2 omega setting still correct. I suggest that the radar system for oak center be checked.
Original NASA ASRS Text
Title: ACR HVT DEVIATE FROM CLRNC ROUTE BETWEEN SLC-HNL. ZOA REPORTED ACFT 12 NM SOUTH OF TRACK WHEN ACFT VOR RECEIVER INDICATED ON TRACK AT BEBOP.
Narrative: INITIAL FLT PLAN WAS SLC-J154-BAM-J32-OAK-BEBOP-R464-BITTA-MAGGI2 - HNL. DURING CLIMB OUT FROM SLC I WAS CLRED DIRECT OAK AND AFTER PASSING ABEAM SAC I WAS CLRED PRESENT POSITION DIRECT BEBOP. I CHECKED BOTH OMEGA AS AGAINST THE OAK VOR/DME ON THE 227 DEG R 120 DME FIX AND BOTH REQUIRED NO UPDATE. APCHING BEBOP I WAS INFORMED BY OAK CENTER THAT I WAS 12 MILES LEFT OF COURSE. BECAUSE BOTH VOR DME READOUTS FROM THE OAK VORTAC SHOWED ME IN THE CORRECT POSITION, I ASKED THE CTLR TO CHECK HIS RADAR. HE INFORMED ME THAT HE DID, AND HE WAS ADAMANT THAT I WAS ON AN INCORRECT COURSE EVEN THOUGH I INFORMED HIM OF MY VOR/DME CHECK. AFTER SEVERAL RADAR POSITION CHECKS FROM HIM, I ACCEPTED A RADAR FIX AND ENTERED 36.35 NORTH, 126.23 WEST AS MY PRESENT POSITION IN #1 OMEGA. I THEN ACCEPTED RADAR VECTORS TO INTERCEPT WHAT HE SHOWED AND WHAT MY #1 OMEGA NOW SHOWED AS ON TRACK FOR R4640. #2 OMEGA REMAINED TUNED AS SET BEFORE TKOF AND CHECKED INBOUND TO OAK. DURING THE FLT OVER-OCEAN I NAVIGATED DIRECTLY BY #1 OMEGA WITH CHECKS ON CROSS TRACK DISTANCE FROM #2 AND LOGGED EACH WAYPOINT READOUT AND CROSS TRACK DISTANCE. AFTER REPORTING BRADR TO OCEANIC CTL I WAS INSTRUCTED TO CONTACT HONOLULU CENTER. ON FIRST CALL UP I WAS IMMEDIATELY INFORMED THAT I WAS TO THE RIGHT OF TRACK BY 10 MILES AND I THEN INFORMED CENTER THAT THIS WAS DUE TO INCORRECT RADAR POSITION REPORTS FROM THE OAKLAND CENTER CTLR. I WAS THEN CLRED DIRECT TO KOKOHEAD. MY #1 VOR WAS PRESELECTED TO THE MKK VORTAC FOR THE INITIAL LEG OF THE MAGGI 1 ARRIVAL AND I INADVERTENTLY HOMED TO MKK. MY DIVERGENCE FROM A DIRECT TRACK TO CKH WAS NOTED BY THE HNL CENTER CTLR AS I WAS CORRECTING BACK, AND I ACCEPTED A VECTOR TO INTERCEPT A SPECIFIC RADIAL TO CKH. OMEGA READOUTS OVER CKH AND ON THE GND AT HNL SHOWED THE #2 OMEGA SETTING STILL CORRECT. I SUGGEST THAT THE RADAR SYSTEM FOR OAK CENTER BE CHECKED.
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.