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DC10 aircraft en route oceanic route inadvertently the omega was uncoupled from the autoplt and heading hold became the lateral mode in FMA. None of flight crew noticed until at a reporting point. Reporter attributes fatigue and distraction from cabin attendant in cockpit.
| Attributes | |
| ACN | 351479 |
| Time | |
| Date | 199610 |
| Day | Tue |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : zny |
| State Reference | NY |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | DC-10 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other |
| Flight Phase | cruise other |
| Route In Use | enroute : other oceanic enroute airway : zny |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| ASRS Report | 351479 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 351480 |
| Events | |
| Anomaly | non adherence : clearance other spatial deviation |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Navigational Facility |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Location: G446. Northbound just south of jains. Northbound on G446 between hunky and jains the omega was inadvertently uncoupled from the autoplt and heading hold became the lateral mode in the FMA. None of the crew members noticed the FMA change. A turn back on course was accomplished prior to position was N31 21.7 west 077 14.4 or about 15 mi west of jains. No conflict noted by ZJX. Contributing factors for me were fatigue, low flight time in the last 2 months due to reserve status, and a flight attendant in the cockpit.
Original NASA ASRS Text
Title: DC10 ACFT ENRTE OCEANIC RTE INADVERTENTLY THE OMEGA WAS UNCOUPLED FROM THE AUTOPLT AND HDG HOLD BECAME THE LATERAL MODE IN FMA. NONE OF FLC NOTICED UNTIL AT A RPTING POINT. RPTR ATTRIBUTES FATIGUE AND DISTR FROM CABIN ATTENDANT IN COCKPIT.
Narrative: LOCATION: G446. NBOUND JUST S OF JAINS. NBOUND ON G446 BTWN HUNKY AND JAINS THE OMEGA WAS INADVERTENTLY UNCOUPLED FROM THE AUTOPLT AND HDG HOLD BECAME THE LATERAL MODE IN THE FMA. NONE OF THE CREW MEMBERS NOTICED THE FMA CHANGE. A TURN BACK ON COURSE WAS ACCOMPLISHED PRIOR TO POS WAS N31 21.7 W 077 14.4 OR ABOUT 15 MI W OF JAINS. NO CONFLICT NOTED BY ZJX. CONTRIBUTING FACTORS FOR ME WERE FATIGUE, LOW FLT TIME IN THE LAST 2 MONTHS DUE TO RESERVE STATUS, AND A FLT ATTENDANT IN THE COCKPIT.
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.