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Oak tower controller and pilot reported that the pilot did not comply with departure instructions causing them to fly into conflict with traffic inbound on an instrument approach.
| Attributes | |
| ACN | 1475825 |
| Time | |
| Date | 201708 |
| Local Time Of Day | 0001-0600 |
| Place | |
| Locale Reference | OAK.Airport |
| State Reference | CA |
| Environment | |
| Flight Conditions | Marginal |
| Light | Night |
| Aircraft 1 | |
| Make Model Name | Skyhawk 172/Cutlass 172 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | Initial Climb |
| Route In Use | None |
| Flight Plan | VFR |
| Aircraft 2 | |
| Make Model Name | B777 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Descent |
| Flight Plan | IFR |
| Person 1 | |
| Function | Local |
| Qualification | Air Traffic Control Fully Certified Flight Crew Instrument |
| Experience | Air Traffic Control Time Certified In Pos 1 (yrs) 1 |
| Person 2 | |
| Function | Single Pilot |
| Qualification | Flight Crew Private Flight Crew Instrument |
| Experience | Flight Crew Last 90 Days 20 Flight Crew Total 415 Flight Crew Type 280 |
| Events | |
| Anomaly | ATC Issue All Types Conflict NMAC Deviation - Procedural Clearance Deviation - Track / Heading All Types |
Narrative:
Aircraft X; a C172; departed and was instructed to make a left turn direct to the mid span of a bridge. Instead; aircraft X made a left downwind departure becoming a conflict for arriving traffic. Aircraft Y was on final approach [when] aircraft X made their unintended turn. When I recognized the conflict I issued traffic to both aircraft and they replied they were looking for traffic. When I realized greater action was required I turned aircraft X 20 degrees left to avoid traffic; but the pilot did not comply. Aircraft Y never got traffic in sight and went around on approximately a two mile final. Aircraft X did advise they had aircraft Y in sight. The radar display showed that the targets merged at 1000 feet. I should have turned aircraft X earlier to avoid the conflict and the pilot of aircraft X should have followed ATC instructions.
Original NASA ASRS Text
Title: OAK Tower Controller and pilot reported that the pilot did not comply with departure instructions causing them to fly into conflict with traffic inbound on an instrument approach.
Narrative: Aircraft X; a C172; departed and was instructed to make a left turn direct to the mid span of a bridge. Instead; Aircraft X made a left downwind departure becoming a conflict for arriving traffic. Aircraft Y was on final approach [when] Aircraft X made their unintended turn. When I recognized the conflict I issued traffic to both aircraft and they replied they were looking for traffic. When I realized greater action was required I turned Aircraft X 20 degrees left to avoid traffic; but the pilot did not comply. Aircraft Y never got traffic in sight and went around on approximately a two mile final. Aircraft X did advise they had Aircraft Y in sight. The radar display showed that the targets merged at 1000 feet. I should have turned Aircraft X earlier to avoid the conflict and the pilot of Aircraft X should have followed ATC instructions.
Data retrieved from NASA's ASRS site 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.