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Pct controller expressed concern regarding multiple unexpected turns made by aircraft assigned the TERPZ2 SID; suggesting the FMS may be programed and/or configured incorrectly.
| Attributes | |
| ACN | 942981 |
| Time | |
| Date | 201104 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | PCT.TRACON |
| State Reference | VA |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | B737 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Climb |
| Route In Use | SID TERPZ2 |
| Flight Plan | IFR |
| Person 1 | |
| Function | Departure |
| Qualification | Air Traffic Control Fully Certified |
| Events | |
| Anomaly | Deviation - Procedural Clearance Deviation - Procedural Published Material / Policy Deviation - Track / Heading All Types |
Narrative:
A B737 turned off the TERPZ2 departure early with no warning. Even though there was weather in the area it was not a factor in the pilot deviating off course. This is the third such similar incident that has occurred in the same location that I have seen. The aircraft FMS is causing it to skip the wonce fix and fly to the next fix; which puts the aircraft in conflict with crossing traffic. This is a reoccurring problem and is a very unsafe situation that needs to be addressed. Recommendation: the TERPZ2 should be suspended and be redrawn to take these aircraft characteristics into account.
Original NASA ASRS Text
Title: PCT Controller expressed concern regarding multiple unexpected turns made by aircraft assigned the TERPZ2 SID; suggesting the FMS may be programed and/or configured incorrectly.
Narrative: A B737 turned off the TERPZ2 departure early with no warning. Even though there was weather in the area it was not a factor in the pilot deviating off course. This is the third such similar incident that has occurred in the same location that I have seen. The aircraft FMS is causing it to skip the WONCE fix and fly to the next fix; which puts the aircraft in conflict with crossing traffic. This is a reoccurring problem and is a very unsafe situation that needs to be addressed. Recommendation: the TERPZ2 should be suspended and be redrawn to take these aircraft characteristics into account.
Data retrieved from NASA's ASRS site as of April 2012 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.