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An aircraft departs sfo on the offshore 4 SID and encountered a TCASII RA west of sfo airport. Flight crew reported an near midair collision.
| Attributes | |
| ACN | 405637 |
| Time | |
| Date | 199806 |
| Day | Fri |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : sfo |
| State Reference | CA |
| Altitude | msl bound lower : 2500 msl bound upper : 2500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : oak tower : ccr |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | other : unknown |
| Navigation In Use | Other |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | departure other departure sid : sid |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Operating Under FAR Part | other : unknown |
| Flight Plan | VFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 210 flight time total : 2700 flight time type : 650 |
| ASRS Report | 405637 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : cfi pilot : commercial pilot : flight engineer pilot : instrument |
| Experience | flight time last 90 days : 750 flight time total : 10000 flight time type : 600 |
| ASRS Report | 405547 |
| Events | |
| Anomaly | other anomaly other |
| Independent Detector | atc equipment other atc equipment : unspecified aircraft equipment other aircraft equipment : unspecified other controllera |
| Resolutory Action | controller : issued new clearance flight crew : took evasive action none taken : unable |
| Consequence | Other |
| Miss Distance | vertical : 300 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
Narrative:
Offshore 4 departure out of sfo. We had been restr to 3000 ft by departure. At designated sfo 4 mi turn point, we began turning and then were assigned 250 degree heading with 5000 ft altitude restr. At 2500 ft MSL we received an RA with 'monitor vertical speed' announcement and a visual symbol of target aircraft at 2200 ft MSL. Captain pulled back on yoke and RA was silenced. Bay departure (135.1) provided a phone number. Bay departure's representative stated that the other aircraft was 2 1/2 mi and 500 ft of separation. Our TCASII alert showed a much closer distance and only 300 ft of separation.
Original NASA ASRS Text
Title: AN ACFT DEPARTS SFO ON THE OFFSHORE 4 SID AND ENCOUNTERED A TCASII RA W OF SFO ARPT. FLC RPTED AN NMAC.
Narrative: OFFSHORE 4 DEP OUT OF SFO. WE HAD BEEN RESTR TO 3000 FT BY DEP. AT DESIGNATED SFO 4 MI TURN POINT, WE BEGAN TURNING AND THEN WERE ASSIGNED 250 DEG HDG WITH 5000 FT ALT RESTR. AT 2500 FT MSL WE RECEIVED AN RA WITH 'MONITOR VERT SPD' ANNOUNCEMENT AND A VISUAL SYMBOL OF TARGET ACFT AT 2200 FT MSL. CAPT PULLED BACK ON YOKE AND RA WAS SILENCED. BAY DEP (135.1) PROVIDED A PHONE NUMBER. BAY DEP'S REPRESENTATIVE STATED THAT THE OTHER ACFT WAS 2 1/2 MI AND 500 FT OF SEPARATION. OUR TCASII ALERT SHOWED A MUCH CLOSER DISTANCE AND ONLY 300 FT OF 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.