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A B747-200 encountered a stick shaker while configuring on a visual approach.
| Attributes | |
| ACN | 851008 |
| Time | |
| Date | 200909 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | B747-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Initial Approach |
| Route In Use | Visual Approach |
| Flight Plan | IFR |
| Person 1 | |
| Function | Pilot Flying First Officer |
| Qualification | Flight Crew Flight Engineer Flight Crew Multiengine Flight Crew Instrument Flight Crew Air Transport Pilot (ATP) Flight Crew Flight Instructor |
| Events | |
| Anomaly | ATC Issue All Types Deviation - Procedural Published Material / Policy Deviation - Speed All Types Inflight Event / Encounter Loss Of Aircraft Control |
Narrative:
We were arriving from europe. We were descended very early; and were below 10;000 MSL by about 70 miles out. Everyone was very concerned about VFR traffic; of which there was a lot on TCAS. The ILS was out of service and we were assigned a visual. We were given a vector for about a two mile final at 3000 ft MSL. When we declined; we were given a down wind and about a five mile base. During the tight base; we were assigned 2000 MSL. During the descent; I commanded flaps 20; gear down; landing checklist and flaps 15. ATC had turned us too far; and I was turning back out to intercept the centerline. The captain was also trying to program the FMS to provide back-up glideslope data. Possibly because of this; he did not reduce the command airspeed bug for the new flap setting. Against our SOP; I reached up to change it myself. About this time; the autopilot captured the altitude; and when I looked down; the aircraft was about 20 KIAS below bug. I applied go around thrust; and shortly there after; the shaker activated briefly. The captain pushed the yoke substantially forward; and then I disconnected the autopilot and continued to push down. The landing finished with no further incident. Contributing was ATC treating a B747 like a C-17. Configuring in a descending turn onto a short final surely contributed. In turn; being told to descend so early led to fuel concerns; which discouraged configuring early. Fatigue surely was a significant factor. We had crossed the atlantic overnight; arriving just 24 hours before starting the flight. I slept badly; going to bed three times.
Original NASA ASRS Text
Title: A B747-200 encountered a stick shaker while configuring on a visual approach.
Narrative: We were arriving from Europe. We were descended very early; and were below 10;000 MSL by about 70 miles out. Everyone was very concerned about VFR traffic; of which there was a lot on TCAS. The ILS was out of service and we were assigned a visual. We were given a vector for about a two mile final at 3000 FT MSL. When we declined; we were given a down wind and about a five mile base. During the tight base; we were assigned 2000 MSL. During the descent; I commanded Flaps 20; gear down; landing checklist and Flaps 15. ATC had turned us too far; and I was turning back out to intercept the centerline. The Captain was also trying to program The FMS to provide back-up glideslope data. Possibly because of this; he did not reduce the command airspeed bug for the new flap setting. Against our SOP; I reached up to change it myself. About this time; the autopilot captured the altitude; and when I looked down; the aircraft was about 20 KIAS below bug. I applied go around thrust; and shortly there after; the shaker activated briefly. The Captain pushed the yoke substantially forward; and then I disconnected the autopilot and continued to push down. The landing finished with no further incident. Contributing was ATC treating a B747 like a C-17. Configuring in a descending turn onto a short final surely contributed. In turn; being told to descend so early led to fuel concerns; which discouraged configuring early. Fatigue surely was a significant factor. We had crossed the Atlantic overnight; arriving just 24 hours before starting the flight. I slept badly; going to bed three times.
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.