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An air carrier flight crew in a DC9 turned off of their assigned heading and conflicted with an air carrier A340. Both aircraft received RA's and the ARTCC radar controller intervened.
| Attributes | |
| ACN | 427691 |
| Time | |
| Date | 199902 |
| Day | Sat |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | navaid : rod.vortac |
| State Reference | IN |
| Altitude | msl single value : 33000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zid.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | DC-9 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other |
| Flight Phase | climbout : vacating altitude |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zid.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | A340 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Route In Use | 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 : 150 flight time total : 13000 flight time type : 500 |
| ASRS Report | 427691 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : multi engine pilot : instrument pilot : atp |
| Experience | flight time last 90 days : 180 flight time total : 8800 flight time type : 2000 |
| ASRS Report | 427797 |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : clearance non adherence : far non adherence : required legal separation other spatial deviation |
| Independent Detector | atc equipment : conflict alert aircraft equipment : tcas |
| Resolutory Action | controller : separated traffic flight crew : took evasive action |
| Consequence | faa : investigated Other |
| Miss Distance | horizontal : 9000 vertical : 1400 |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
Narrative:
Assigned a heading for traffic and cleared to resume climb. I had been on the assigned heading for several mins. I glanced at course indicator which showed us well left of course due to the assigned heading. On seeing how far off we were and that the VOR had already been passed and that we had about a 100 KT crosswind, I forgot we had been assigned a heading until further advised and turned to recapture the course. About 20 seconds or so into my incorrect turn the controller queried us and we got an 'RA.' I have made this mistake before, but had always caught it in time. I have since developed, and I think it is important to have, a reliable technique to remind oneself that a 'maintain assigned heading' instruction not be forgotten. Supplemental information from acn 427688: aircraft #1 was assigned a heading to provide lateral separation from aircraft #2 and for his climb. Aircraft #1 deviated from his assigned heading without clearance, causing loss of separation with aircraft #2. Subsequent turns were issued. RA's resulted from the deviation. Both lived.
Original NASA ASRS Text
Title: AN ACR FLC IN A DC9 TURNED OFF OF THEIR ASSIGNED HDG AND CONFLICTED WITH AN ACR A340. BOTH ACFT RECEIVED RA'S AND THE ARTCC RADAR CTLR INTERVENED.
Narrative: ASSIGNED A HDG FOR TFC AND CLRED TO RESUME CLB. I HAD BEEN ON THE ASSIGNED HDG FOR SEVERAL MINS. I GLANCED AT COURSE INDICATOR WHICH SHOWED US WELL L OF COURSE DUE TO THE ASSIGNED HDG. ON SEEING HOW FAR OFF WE WERE AND THAT THE VOR HAD ALREADY BEEN PASSED AND THAT WE HAD ABOUT A 100 KT XWIND, I FORGOT WE HAD BEEN ASSIGNED A HDG UNTIL FURTHER ADVISED AND TURNED TO RECAPTURE THE COURSE. ABOUT 20 SECONDS OR SO INTO MY INCORRECT TURN THE CTLR QUERIED US AND WE GOT AN 'RA.' I HAVE MADE THIS MISTAKE BEFORE, BUT HAD ALWAYS CAUGHT IT IN TIME. I HAVE SINCE DEVELOPED, AND I THINK IT IS IMPORTANT TO HAVE, A RELIABLE TECHNIQUE TO REMIND ONESELF THAT A 'MAINTAIN ASSIGNED HDG' INSTRUCTION NOT BE FORGOTTEN. SUPPLEMENTAL INFO FROM ACN 427688: ACFT #1 WAS ASSIGNED A HDG TO PROVIDE LATERAL SEPARATION FROM ACFT #2 AND FOR HIS CLB. ACFT #1 DEVIATED FROM HIS ASSIGNED HDG WITHOUT CLRNC, CAUSING LOSS OF SEPARATION WITH ACFT #2. SUBSEQUENT TURNS WERE ISSUED. RA'S RESULTED FROM THE DEV. BOTH LIVED.
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.