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Mia TRACON controller reported a B737 encountered wake turbulence 8 miles in trail of a B747-8 at 8;000 feet.
| Attributes | |
| ACN | 1551825 |
| Time | |
| Date | 201806 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | MIA.TRACON |
| State Reference | FL |
| Aircraft 1 | |
| Make Model Name | B737 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Descent |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | B747-800 Advanced |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Descent |
| Flight Plan | IFR |
| Person 1 | |
| Function | Approach |
| Events | |
| Anomaly | ATC Issue All Types Deviation - Altitude Excursion From Assigned Altitude Deviation - Procedural Published Material / Policy Inflight Event / Encounter Loss Of Aircraft Control Inflight Event / Encounter Wake Vortex Encounter |
Narrative:
Aircraft X; B737 was in trail of aircraft Y; a B747-8; from the center. Previous controller had worked the two aircraft through part of the arrival corridor; and I had relieved him from the position. He briefed that the B747-8 was told to maintain 250 knots for wake turbulence spacing; and the B737 was at 250 knots as well. I took over and later slowed the B737 to 220 knots first; since he was in trail; and then slowed the B747-8 to 220 knots as well. The B747-8 made the turn on the arrival; and shortly after the B737 showed a descent out of 8000 feet even though they weren't issued one. They then came on frequency to report they encountered wake from the aircraft in front and lost 600 to 700 feet in altitude and 30 degrees of bank angle. The aircraft recovered and I made sure to get a report that everyone on board the aircraft was okay and that no assistance was needed at the gate upon arrival. The pilot reported that everyone was fine and no assistance was needed. During the time working; in trail separation observed on the scope was about 8 miles; and reported by the pilot as 8 miles as well.
Original NASA ASRS Text
Title: MIA TRACON Controller reported a B737 encountered wake turbulence 8 miles in trail of a B747-8 at 8;000 feet.
Narrative: Aircraft X; B737 was in trail of Aircraft Y; a B747-8; from the Center. Previous Controller had worked the two aircraft through part of the arrival corridor; and I had relieved him from the position. He briefed that the B747-8 was told to maintain 250 knots for wake turbulence spacing; and the B737 was at 250 knots as well. I took over and later slowed the B737 to 220 knots first; since he was in trail; and then slowed the B747-8 to 220 knots as well. The B747-8 made the turn on the arrival; and shortly after the B737 showed a descent out of 8000 feet even though they weren't issued one. They then came on frequency to report they encountered wake from the aircraft in front and lost 600 to 700 feet in altitude and 30 degrees of bank angle. The aircraft recovered and I made sure to get a report that everyone on board the aircraft was okay and that no assistance was needed at the gate upon arrival. The pilot reported that everyone was fine and no assistance was needed. During the time working; in trail separation observed on the scope was about 8 miles; and reported by the pilot as 8 miles as well.
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.