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An air carrier aircraft in cruise at 10;000 MSL on an unpressurized ferry flight suffered a close encounter with an unidentified opposite direction aircraft in a climb.
| Attributes | |
| ACN | 1091471 |
| Time | |
| Date | 201305 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZOA.ARTCC |
| State Reference | CA |
| Aircraft 1 | |
| Make Model Name | McDonnell Douglas Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Climb |
| Flight Plan | IFR |
| Person 1 | |
| Function | Dispatcher |
| Qualification | Dispatch Dispatcher |
| Events | |
| Anomaly | ATC Issue All Types Conflict NMAC Deviation - Altitude Excursion From Assigned Altitude Deviation - Track / Heading All Types |
| Miss Distance | Horizontal 100 Vertical 100 |
Narrative:
On an unpressurized flight between smf-ZZZ at cruise altitude 10;000 ft; crew got a TA on an aircraft below them and climbing. At approximately 4 miles ATC gave them a traffic alert at the same time they got an RA with a climb command. As the flight was climbing first officer spotted the other aircraft coming right at them and first officer said 'turn left.' captain rolled aircraft into a 34-45 degree left bank as the controller was advising them to turn right which they could not comply with. Both aircraft were climbing with a constant separation of 100 ft. The first officer; watching the other aircraft; said; 'descend descend!' captain lowered the nose and the other aircraft passed aircraft X at a close range. (Aircraft X climbed to approximately 11;300 ft before descending back to 10;000 ft and on course.it appears both aircraft were near the borders of two sectors. Each aircraft was on a different frequency from the other but in the same immediate airspace.controllers need to pay attention to all aircraft in their sector as well as the neighboring sectors during hand-offs and provide appropriate horizontal and vertical separation.
Original NASA ASRS Text
Title: An air carrier aircraft in cruise at 10;000 MSL on an unpressurized ferry flight suffered a close encounter with an unidentified opposite direction aircraft in a climb.
Narrative: On an unpressurized flight between SMF-ZZZ at cruise altitude 10;000 FT; crew got a TA on an aircraft below them and climbing. At approximately 4 miles ATC gave them a traffic alert at the same time they got an RA with a climb command. As the flight was climbing First Officer spotted the other aircraft coming right at them and First Officer said 'Turn Left.' Captain rolled aircraft into a 34-45 degree left bank as the Controller was advising them to turn right which they could not comply with. Both aircraft were climbing with a constant separation of 100 FT. The First Officer; watching the other aircraft; said; 'Descend Descend!' Captain lowered the nose and the other aircraft passed Aircraft X at a close range. (Aircraft X climbed to approximately 11;300 FT before descending back to 10;000 FT and on course.It appears both aircraft were near the borders of two sectors. Each aircraft was on a different frequency from the other but in the same immediate airspace.Controllers need to pay attention to all aircraft in their sector as well as the neighboring sectors during hand-offs and provide appropriate horizontal and vertical separation.
Data retrieved from NASA's ASRS site as of July 2013 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.