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Close proximity air carrier-large transport cpr-small transport making night visual approach to parallel runways at sfo.
| Attributes | |
| ACN | 106308 |
| Time | |
| Date | 198903 |
| Day | Wed |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : sfo |
| State Reference | CA |
| Altitude | msl bound lower : 2600 msl bound upper : 2900 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tracon : oak |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | descent : approach descent other |
| Route In Use | approach : visual |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | general aviation : corporate |
| Make Model Name | Small Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | descent : approach descent other |
| Route In Use | approach : visual enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : cfi pilot : flight engineer pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 15000 flight time type : 6000 |
| ASRS Report | 106308 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : cfi pilot : flight engineer pilot : instrument |
| Experience | flight time last 90 days : 200 flight time total : 5000 flight time type : 2000 |
| ASRS Report | 107508 |
| Events | |
| Anomaly | conflict : nmac non adherence : clearance other spatial deviation |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | horizontal : 200 vertical : 300 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
We were on an ILS approach to runway 28R at sfo when an small transport being vectored to a visibility for runway 28L overshot his turn to final and wound up directly over our aircraft. We immediately descended below G/south to increase sep. Small transport returned to center line of 28L and slowed so as to drop behind us. Small transport had reported us as 'in sight' to approach control. Contributing factors: the center line of these 2 runways are very close together. Visuals are normally via the 28L ILS and the sfo VOR 095 degree right, however during the incident described we were cleared via the ILS 28R, decreasing the sep with traffic on the 28L localizer intercept. There were strong southerly winds aloft at time of incident which would tend to drift an aircraft through the localizer when intercepting from the south. Pilot may have been unfamiliar with hazards involved with this approach. Also, if he was using the sfo approach chart '19-2 tip toe visibility,' he may well have expected us to be on the sfo 095 degree radial due to the statement, 'simultaneous visibility approachs may be in progress to runway 28R utilizing the sfo VOR R095.'
Original NASA ASRS Text
Title: CLOSE PROX ACR-LGT CPR-SMT MAKING NIGHT VISUAL APCH TO PARALLEL RWYS AT SFO.
Narrative: WE WERE ON AN ILS APCH TO RWY 28R AT SFO WHEN AN SMT BEING VECTORED TO A VIS FOR RWY 28L OVERSHOT HIS TURN TO FINAL AND WOUND UP DIRECTLY OVER OUR ACFT. WE IMMEDIATELY DSNDED BELOW G/S TO INCREASE SEP. SMT RETURNED TO CENTER LINE OF 28L AND SLOWED SO AS TO DROP BEHIND US. SMT HAD RPTED US AS 'IN SIGHT' TO APCH CTL. CONTRIBUTING FACTORS: THE CENTER LINE OF THESE 2 RWYS ARE VERY CLOSE TOGETHER. VISUALS ARE NORMALLY VIA THE 28L ILS AND THE SFO VOR 095 DEG R, HOWEVER DURING THE INCIDENT DESCRIBED WE WERE CLRED VIA THE ILS 28R, DECREASING THE SEP WITH TFC ON THE 28L LOC INTERCEPT. THERE WERE STRONG SOUTHERLY WINDS ALOFT AT TIME OF INCIDENT WHICH WOULD TEND TO DRIFT AN ACFT THROUGH THE LOC WHEN INTERCEPTING FROM THE S. PLT MAY HAVE BEEN UNFAMILIAR WITH HAZARDS INVOLVED WITH THIS APCH. ALSO, IF HE WAS USING THE SFO APCH CHART '19-2 TIP TOE VIS,' HE MAY WELL HAVE EXPECTED US TO BE ON THE SFO 095 DEG RADIAL DUE TO THE STATEMENT, 'SIMULTANEOUS VIS APCHS MAY BE IN PROGRESS TO RWY 28R UTILIZING THE SFO VOR R095.'
Data retrieved from NASA's ASRS site as of August 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.