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B747 flight crew reported that ATC instructed them to maintain greater than 250 kts. Airspeed below 10;000 ft.
| Attributes | |
| ACN | 1743683 |
| Time | |
| Date | 202005 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZAN.ARTCC |
| State Reference | AK |
| Aircraft 1 | |
| Make Model Name | B747-400 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Descent |
| Route In Use | STAR NEEL6 |
| Flight Plan | IFR |
| Person 1 | |
| Function | Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine Flight Crew Instrument |
| Person 2 | |
| Function | Relief Pilot First Officer |
| Qualification | Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine Flight Crew Instrument |
| Events | |
| Anomaly | ATC Issue All Types Deviation - Procedural Clearance Deviation - Procedural Published Material / Policy Deviation - Speed All Types |
Narrative:
While descending on neell 6 RNAV arrival into ILS 07R at anc with auto pilot engaged; ATC asked us to maintain 310 kts. Or greater transition airspeed for spacing. When aircraft just passing below 11;000 ft. It began to slow to 240 kts. Then; ATC asked us to keep up the speed. Then I asked ATC more than 3 times to confirm to descend below 10;000 ft. With more than 250 kts. High speed. 310 kts. ATC's response was 'affirmative!' shortly afterward; ATC told us to maintain 280 kts. Or greater until further advised.
Original NASA ASRS Text
Title: B747 flight crew reported that ATC instructed them to maintain greater than 250 kts. airspeed below 10;000 ft.
Narrative: While descending on NEELL 6 RNAV Arrival into ILS 07R at ANC with Auto Pilot engaged; ATC asked us to maintain 310 kts. or greater transition airspeed for spacing. When aircraft just passing below 11;000 ft. it began to slow to 240 kts. Then; ATC asked us to keep up the speed. Then I asked ATC more than 3 times to confirm to descend below 10;000 ft. with more than 250 kts. high speed. 310 kts. ATC's response was 'Affirmative!' Shortly afterward; ATC told us to maintain 280 kts. or greater until further advised.
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.