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Air carrier widebody transport deviated from clearance route. Did not maintain 10 NM offset off traffic separation as cleared.
| Attributes | |
| ACN | 105855 |
| Time | |
| Date | 198903 |
| Day | Thu |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : hya |
| State Reference | MA |
| Altitude | msl bound lower : 37000 msl bound upper : 39000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : cyqm tower : sus |
| Operator | common carrier : air carrier |
| Make Model Name | Widebody, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other Other |
| Flight Phase | cruise other |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | other personnel other |
| Qualification | pilot : instrument pilot : atp pilot : commercial |
| Experience | flight time last 90 days : 200 flight time total : 3000 flight time type : 100 |
| ASRS Report | 105855 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Events | |
| Anomaly | non adherence : clearance other spatial deviation |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
While on prescribed track to hyannis in moncton center airspace at FL390, (in VFR conditions) we were asked to offset 10 mi to the right for spacing due to company traffic. We programmed FMS accordingly and autoplt commenced turn to the right. We noticed that aircraft appeared to be going beyond 10 mi offset according to parallel track indications on CRT and commenced a turn to parallel original track at what appeared to be 10 mi. At this time moncton center who had us on radar began giving various heading commands which we followed, finally moncton advised 'descend to FL370 immediately.' which we acknowledged and accomplished. We advised center that our IRS navigation appeared to malfunction on the original offset. After being handed off to bos, we were advised by bos that moncton 'was filing paperwork on the incident.' I can only say that we never saw the other aircraft, there was no near miss and moncton was not at all helpful but appeared to be irritated that we were not following their directions fast enough. Moncton appears to work against you instead of with you. I understand this isn't the first time.
Original NASA ASRS Text
Title: ACR WDB DEVIATED FROM CLRNC ROUTE. DID NOT MAINTAIN 10 NM OFFSET OFF TRAFFIC SEPARATION AS CLEARED.
Narrative: WHILE ON PRESCRIBED TRACK TO HYANNIS IN MONCTON CENTER AIRSPACE AT FL390, (IN VFR CONDITIONS) WE WERE ASKED TO OFFSET 10 MI TO THE RIGHT FOR SPACING DUE TO COMPANY TFC. WE PROGRAMMED FMS ACCORDINGLY AND AUTOPLT COMMENCED TURN TO THE RIGHT. WE NOTICED THAT ACFT APPEARED TO BE GOING BEYOND 10 MI OFFSET ACCORDING TO PARALLEL TRACK INDICATIONS ON CRT AND COMMENCED A TURN TO PARALLEL ORIGINAL TRACK AT WHAT APPEARED TO BE 10 MI. AT THIS TIME MONCTON CENTER WHO HAD US ON RADAR BEGAN GIVING VARIOUS HDG COMMANDS WHICH WE FOLLOWED, FINALLY MONCTON ADVISED 'DSND TO FL370 IMMEDIATELY.' WHICH WE ACKNOWLEDGED AND ACCOMPLISHED. WE ADVISED CENTER THAT OUR IRS NAV APPEARED TO MALFUNCTION ON THE ORIGINAL OFFSET. AFTER BEING HANDED OFF TO BOS, WE WERE ADVISED BY BOS THAT MONCTON 'WAS FILING PAPERWORK ON THE INCIDENT.' I CAN ONLY SAY THAT WE NEVER SAW THE OTHER ACFT, THERE WAS NO NEAR MISS AND MONCTON WAS NOT AT ALL HELPFUL BUT APPEARED TO BE IRRITATED THAT WE WERE NOT FOLLOWING THEIR DIRECTIONS FAST ENOUGH. MONCTON APPEARS TO WORK AGAINST YOU INSTEAD OF WITH YOU. I UNDERSTAND THIS ISN'T THE FIRST TIME.
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.