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A B737-500 under oak, ca, control is told to speed up to pass a DC10 approaching an adjacent runway, however, it never gets closer than 1 mi to the DC10. Captain feels he should have received a vector to provide wake turbulence separation standards behind the DC10.
| Attributes | |
| ACN | 387182 |
| Time | |
| Date | 199712 |
| Day | Mon |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : sfo |
| State Reference | CA |
| Altitude | msl bound lower : 2000 msl bound upper : 2000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : oak |
| Operator | common carrier : air carrier |
| Make Model Name | B737-500 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | descent : approach descent other landing other |
| Route In Use | approach : straight in |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | DC-10 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach descent other landing other |
| Route In Use | approach : visual |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : instrument pilot : atp pilot : flight engineer pilot : commercial pilot : cfi |
| Experience | flight time last 90 days : 120 flight time total : 10000 flight time type : 2000 |
| ASRS Report | 387182 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : anomaly accepted |
| Consequence | Other |
| Miss Distance | horizontal : 6000 vertical : 0 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
On tipptoe approach to runway 28L, told to keep speed at 210 KTS. He slowed DC10 to 180 KTS. DC10 was ahead of us. Controller wanted us to pass the DC10 on closely spaced finals. We could not catch up to the DC10. Did not receive visual separation clearance until 1 mi in trail of DC10. He should have vectored us 5 mi in trail. We did not have legal wake turbulence separation.
Original NASA ASRS Text
Title: A B737-500 UNDER OAK, CA, CTL IS TOLD TO SPD UP TO PASS A DC10 APCHING AN ADJACENT RWY, HOWEVER, IT NEVER GETS CLOSER THAN 1 MI TO THE DC10. CAPT FEELS HE SHOULD HAVE RECEIVED A VECTOR TO PROVIDE WAKE TURB SEPARATION STANDARDS BEHIND THE DC10.
Narrative: ON TIPPTOE APCH TO RWY 28L, TOLD TO KEEP SPD AT 210 KTS. HE SLOWED DC10 TO 180 KTS. DC10 WAS AHEAD OF US. CTLR WANTED US TO PASS THE DC10 ON CLOSELY SPACED FINALS. WE COULD NOT CATCH UP TO THE DC10. DID NOT RECEIVE VISUAL SEPARATION CLRNC UNTIL 1 MI IN TRAIL OF DC10. HE SHOULD HAVE VECTORED US 5 MI IN TRAIL. WE DID NOT HAVE LEGAL WAKE TURB SEPARATION.
Data retrieved from NASA's ASRS site as of July 2007 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.