|37000 Feet||Browse and search NASA's
Aviation Safety Reporting System
|Local Time Of Day||0001 To 0600|
|Locale Reference||atc facility : hnl|
|Altitude||msl bound lower : 29000|
msl bound upper : 29000
|Controlling Facilities||artcc : zoa|
|Operator||common carrier : air carrier|
|Make Model Name||Widebody, Low Wing, 4 Turbojet Eng|
|Navigation In Use||Other|
|Flight Phase||cruise other|
|Route In Use||enroute : pacific|
enroute : other oceanic
|Affiliation||company : air carrier|
|Function||flight crew : captain|
oversight : pic
|Qualification||pilot : atp|
pilot : flight engineer
|Experience||flight time last 90 days : 232|
flight time total : 18238
flight time type : 3252
|Anomaly||non adherence : clearance|
other spatial deviation
|Independent Detector||other controllera|
|Resolutory Action||controller : issued new clearance|
|Primary Problem||Flight Crew Human Performance|
|Air Traffic Incident||Pilot Deviation|
En route from seoul to los angeles. I was captain. We were at 29000' and were advised not to expect higher due to traffic. We had a potential fuel problem if unable to get higher altitude. We then requested new routing on the condition we could get higher altitude (35000'). ATC read new clearance we had requested but no altitude change. We replied that we wanted FL350. We were later told by company 29000' would be ok for rest of flight and we cancelled our request for new routing. It seems ATC thought we had accepted the new clearance with no altitude change. We did not understand that we accepted a new clearance (routing). In the future I will try to be more definite in refusing a clearance. About 2-3 mins after the above message we gave our position report and estimated our next chkpoint per our original flight plan.
Original NASA ASRS Text
Title: OCEANIC TRACK DEVIATION BY ACR WDB.
Narrative: ENRTE FROM SEOUL TO LOS ANGELES. I WAS CAPT. WE WERE AT 29000' AND WERE ADVISED NOT TO EXPECT HIGHER DUE TO TFC. WE HAD A POTENTIAL FUEL PROB IF UNABLE TO GET HIGHER ALT. WE THEN REQUESTED NEW ROUTING ON THE CONDITION WE COULD GET HIGHER ALT (35000'). ATC READ NEW CLRNC WE HAD REQUESTED BUT NO ALT CHANGE. WE REPLIED THAT WE WANTED FL350. WE WERE LATER TOLD BY COMPANY 29000' WOULD BE OK FOR REST OF FLT AND WE CANCELLED OUR REQUEST FOR NEW ROUTING. IT SEEMS ATC THOUGHT WE HAD ACCEPTED THE NEW CLRNC WITH NO ALT CHANGE. WE DID NOT UNDERSTAND THAT WE ACCEPTED A NEW CLRNC (ROUTING). IN THE FUTURE I WILL TRY TO BE MORE DEFINITE IN REFUSING A CLRNC. ABOUT 2-3 MINS AFTER THE ABOVE MESSAGE WE GAVE OUR POS RPT AND ESTIMATED OUR NEXT CHKPOINT PER OUR ORIGINAL FLT PLAN.
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.