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Air carrier widebody transport track heading deviation after crossing hawaii ADIZ causes less than standard separation with eastbound traffic.
| Attributes | |
| ACN | 191746 |
| Time | |
| Date | 199110 |
| Day | Fri |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : hnl |
| State Reference | HI |
| Altitude | msl bound lower : 30000 msl bound upper : 31000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zhn |
| Operator | common carrier : air carrier |
| Make Model Name | Widebody, Low Wing, 3 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | cruise other |
| Route In Use | enroute : pacific enroute : other oceanic enroute airway : r576 enroute other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 90 flight time total : 16000 |
| ASRS Report | 191746 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp pilot : commercial pilot : flight engineer |
| Experience | flight time last 90 days : 200 flight time total : 10000 flight time type : 3000 |
| ASRS Report | 191296 |
| Events | |
| Anomaly | non adherence : required legal separation non adherence : clearance other spatial deviation |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance other |
| Consequence | faa : investigated faa : reviewed incident with flight crew |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Prior to reaching duffe intersection on R576 I had to leave the cockpit for physiological needs. At this time I informed the first officer that 'you have control F the aircraft. I have to use the restroom.' upon reentering the cockpit I noticed that we had descended from FL310 to FL300 and was informed that we had been given a new clearance by ATC to proceed present position direct bambo intersection and to FL300. A few mins later the first officer informed me that he had been trying to call honolulu radio unsuccessfully prior to denns and then after crossing denns intersection the aircraft evidently started a shallow left turn and that he had not noticed this. He then received a cll from honolulu radio to call honolulu center. Once contact was established with center he was advised that he was 25 mi south of denns intersection (he should have turned to the west). At this time center issued the new clearance. A few mins later center called and requested that we contact them by telephone after we landed. I called as requested and was advised by phone that the aircraft had drifted approximately 25 mi south of denns intersection and that they had to issue a new clearance to avoid a possible conflict with another aircraft proceeding to ebber intersection. I was informed that we had crossed over denns intersection and after this is when the problem of heading south began.
Original NASA ASRS Text
Title: ACR WDB TRACK HDG DEV AFTER XING HAWAII ADIZ CAUSES LTSS WITH EBOUND TFC.
Narrative: PRIOR TO REACHING DUFFE INTXN ON R576 I HAD TO LEAVE THE COCKPIT FOR PHYSIOLOGICAL NEEDS. AT THIS TIME I INFORMED THE FO THAT 'YOU HAVE CTL F THE ACFT. I HAVE TO USE THE RESTROOM.' UPON REENTERING THE COCKPIT I NOTICED THAT WE HAD DSNDED FROM FL310 TO FL300 AND WAS INFORMED THAT WE HAD BEEN GIVEN A NEW CLRNC BY ATC TO PROCEED PRESENT POS DIRECT BAMBO INTXN AND TO FL300. A FEW MINS LATER THE FO INFORMED ME THAT HE HAD BEEN TRYING TO CALL HONOLULU RADIO UNSUCCESSFULLY PRIOR TO DENNS AND THEN AFTER XING DENNS INTXN THE ACFT EVIDENTLY STARTED A SHALLOW L TURN AND THAT HE HAD NOT NOTICED THIS. HE THEN RECEIVED A CLL FROM HONOLULU RADIO TO CALL HONOLULU CTR. ONCE CONTACT WAS ESTABLISHED WITH CTR HE WAS ADVISED THAT HE WAS 25 MI S OF DENNS INTXN (HE SHOULD HAVE TURNED TO THE W). AT THIS TIME CTR ISSUED THE NEW CLRNC. A FEW MINS LATER CTR CALLED AND REQUESTED THAT WE CONTACT THEM BY TELEPHONE AFTER WE LANDED. I CALLED AS REQUESTED AND WAS ADVISED BY PHONE THAT THE ACFT HAD DRIFTED APPROX 25 MI S OF DENNS INTXN AND THAT THEY HAD TO ISSUE A NEW CLRNC TO AVOID A POSSIBLE CONFLICT WITH ANOTHER ACFT PROCEEDING TO EBBER INTXN. I WAS INFORMED THAT WE HAD CROSSED OVER DENNS INTXN AND AFTER THIS IS WHEN THE PROBLEM OF HDG S BEGAN.
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.