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B777-200 flight crew reported an unstabilized approach on ILS approach due to the influence of a strong tailwind.
| Attributes | |
| ACN | 1517287 |
| Time | |
| Date | 201802 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | JFK.Tower |
| State Reference | NY |
| Environment | |
| Flight Conditions | IMC |
| Aircraft 1 | |
| Make Model Name | B777-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Final Approach |
| Flight Plan | IFR |
| Person 1 | |
| Function | Pilot Flying First Officer |
| Qualification | Flight Crew Commercial |
| Person 2 | |
| Function | Pilot Not Flying Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Deviation - Procedural Published Material / Policy Deviation - Speed All Types Inflight Event / Encounter Unstabilized Approach |
Narrative:
As flying pilot I was too fast and above the glide slope for most of the approach. Speed and glide slope were caught somewhere around 500 feet. A normal landing in the touchdown zone was made. We were vectored onto localizer for ILS 4R at jfk. Altitude was 1500ft. We were given and accepted a clearance to maintain 180kts to the marker. I had gear down; flaps 20 at marker crossing. Because of a strong tailwind of 40 kts at that altitude; the airplane did not decelerate as I descended on the G\south. I turned off the autopilot and leveled off at 1200 ft so I could decelerate and call for final flap setting. This caused me to be high on the G/south as well as fast for most of the approach. As the tailwind changed into a headwind; both speed and glide path returned to normal. We made a normal landing in the touchdown zone. We should not have accepted the 180 speed from ATC. It left me with only 500ft to lose 40kts of airspeed during a descent with a big tailwind. I was not at 25 flaps over the marker because the flap limit is 185 and I felt it would be too easy to over speed the flaps at that setting and airspeed. The speed brakes would have helped. I should have used them to slow initially
Original NASA ASRS Text
Title: B777-200 flight crew reported an unstabilized approach on ILS approach due to the influence of a strong tailwind.
Narrative: As flying pilot I was too fast and above the glide slope for most of the approach. Speed and glide slope were caught somewhere around 500 feet. A normal landing in the touchdown zone was made. We were vectored onto localizer for ILS 4R at JFK. Altitude was 1500ft. We were given and accepted a clearance to maintain 180kts to the marker. I had gear down; flaps 20 at marker crossing. Because of a strong tailwind of 40 kts at that altitude; the airplane did not decelerate as I descended on the G\S. I turned off the autopilot and leveled off at 1200 ft so I could decelerate and call for final flap setting. This caused me to be high on the G/S as well as fast for most of the approach. As the tailwind changed into a headwind; both speed and glide path returned to normal. We made a normal landing in the touchdown zone. We should not have accepted the 180 speed from ATC. It left me with only 500ft to lose 40kts of airspeed during a descent with a big tailwind. I was not at 25 flaps over the marker because the flap limit is 185 and I felt it would be too easy to over speed the flaps at that setting and airspeed. The speed brakes would have helped. I should have used them to slow initially
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.