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A330 captain; departing on the PEBLE3 from san; is informed that the large radius turn initiated approaching sxc to intercept C1177 outbound has resulted in an incursion into W-291.
| Attributes | |
| ACN | 1022329 |
| Time | |
| Date | 201207 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | SXC.VORTAC |
| State Reference | CA |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | A330 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Climb |
| Route In Use | SID PEBLE3 |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | FMS/FMC |
| Person 1 | |
| Function | Pilot Not Flying Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Airspace Violation All Types Deviation - Procedural Clearance Deviation - Track / Heading All Types |
Narrative:
Flight from san; cleared via peble three departure; sxc; C1177. The climb out was normal. Autopilot on and aircraft in navigation and proceeded on course to sxc from peble. We passed sxc and noticed that the FMS made it a 'fly by waypoint' because of the large turn it had to make to continue on C1177. This is a normal function of the airbus FMS. We were about FL250 or higher and at normal climb speed of about 310 KIAS. ATC calls and tells us that we had flown into the warning area W-291 by about 2 or so miles. He also said that he has noticed this happening with airbus type aircraft. We responded that the FMS does this 'fly by waypoint' and that we have no idea that it is encroaching into the warning area. I relayed to him that I would let the company know about this problem and that we should make it an 'overfly waypoint'. He said he would follow up and let our company know about the problem. Why this event occurred in my opinion is that the FMS tries to make a smooth turn in transition to course changes. This probably is the way that the FMS is programmed from airbus and honeywell. We need to make a change to either the FMS or make sxc an 'overfly waypoint'. Maybe the chart maker should be notified also.
Original NASA ASRS Text
Title: A330 Captain; departing on the PEBLE3 from SAN; is informed that the large radius turn initiated approaching SXC to intercept C1177 outbound has resulted in an incursion into W-291.
Narrative: Flight from SAN; cleared via PEBLE Three Departure; SXC; C1177. The climb out was normal. Autopilot ON and aircraft in NAV and proceeded on course to SXC from PEBLE. We passed SXC and noticed that the FMS made it a 'FLY BY WAYPOINT' because of the large turn it had to make to continue on C1177. This is a normal function of the Airbus FMS. We were about FL250 or higher and at normal climb speed of about 310 KIAS. ATC calls and tells us that we had flown into the warning area W-291 by about 2 or so miles. He also said that he has noticed this happening with Airbus type aircraft. We responded that the FMS does this 'FLY BY WAYPOINT' and that we have no idea that it is encroaching into the warning area. I relayed to him that I would let the company know about this problem and that we should make it an 'OVERFLY WAYPOINT'. He said he would follow up and let our company know about the problem. Why this event occurred in my opinion is that the FMS tries to make a smooth turn in transition to course changes. This probably is the way that the FMS is programmed from Airbus and Honeywell. We need to make a change to either the FMS or make SXC an 'OVERFLY WAYPOINT'. Maybe the chart maker should be notified also.
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.