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A320 pilot reported he was upset with sfo controller's technique in not providing enough margin to a preceding B747 wake turbulence.
| Attributes | |
| ACN | 1042617 |
| Time | |
| Date | 201210 |
| Local Time Of Day | 0001-0600 |
| Place | |
| Locale Reference | SFO.Airport |
| State Reference | CA |
| Environment | |
| Flight Conditions | IMC |
| Aircraft 1 | |
| Make Model Name | A320 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Final Approach |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | B747 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Landing |
| Person 1 | |
| Function | Pilot Not Flying |
| Experience | Flight Crew Last 90 Days 200 Flight Crew Total 19000 Flight Crew Type 7000 |
| Events | |
| Anomaly | ATC Issue All Types Deviation - Procedural Published Material / Policy |
Narrative:
We [were] flying the lda prm 28R in sfo. We were put 2.5 miles behind a 747-400 who was on the ILS 28L. The winds below 4;000 ft were 180 at 15 KTS and surface winds were 250 at 10 KTS. I asked to slow due to the 747's close proximity on the approach given the southerly winds that would blow the 747's wake into our path. The controller seemed upset that we were concerned about the possible wake encounter and said that we could go missed if we had a problem. We broke out at 1;700 ft and stayed high and flew over the wake that we could clearly see due to the moisture in the air! My issue is with the controller not having any situational awareness in regards to the 747 and the winds aloft considering the close proximity of the aircraft and these dangerous approaches. Smaller aircraft should be still given 5 miles behind a heavy on this approach considering how close the 2 runways are (750 ft)! This is an accident waiting to happen!
Original NASA ASRS Text
Title: A320 pilot reported he was upset with SFO Controller's technique in not providing enough margin to a preceding B747 wake turbulence.
Narrative: We [were] flying the LDA PRM 28R in SFO. We were put 2.5 miles behind a 747-400 who was on the ILS 28L. The winds below 4;000 FT were 180 at 15 KTS and surface winds were 250 at 10 KTS. I asked to slow due to the 747's close proximity on the approach given the southerly winds that would blow the 747's wake into our path. The Controller seemed upset that we were concerned about the possible wake encounter and said that we could go missed if we had a problem. We broke out at 1;700 FT and stayed high and flew over the wake that we could clearly see due to the moisture in the air! My issue is with the Controller not having any situational awareness in regards to the 747 and the winds aloft considering the close proximity of the aircraft and these dangerous approaches. Smaller aircraft should be still given 5 miles behind a heavy on this approach considering how close the 2 runways are (750 FT)! This is an accident waiting to happen!
Data retrieved from NASA's ASRS site as of July 2013 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.