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MD80 crew points out the danger of operating in intense light aircraft traffic areas while flying the marvn arrival to oak.
| Attributes | |
| ACN | 524292 |
| Time | |
| Date | 200109 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | intersection : sunol |
| State Reference | CA |
| Altitude | msl single value : 5000 |
| Aircraft 1 | |
| Controlling Facilities | tracon : o90.tracon tower : dpa.tower |
| Operator | common carrier : air carrier |
| Make Model Name | MD-80 Series (DC-9-80) Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : intermediate altitude |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tracon : o90.tracon |
| Operator | general aviation : personal |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise : level |
| Flight Plan | VFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 524292 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Events | |
| Anomaly | conflict : airborne critical other anomaly other |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | flight crew : took evasive action none taken : detected after the fact other |
| Consequence | other |
| Supplementary | |
| Problem Areas | FAA Chart Or Publication Airspace Structure ATC Human Performance Flight Crew Human Performance |
| Primary Problem | FAA |
| Situations | |
| Chart | star : marvn one |
Narrative:
The arrival brings you down low out over the central valley and even lower through the sunol pass. We are over the valley below 15000 ft which is the main altitudes for traffic transiting up the valley VFR. We also come through the sunol pass at 5000 ft which is the exact altitude that VFR traffic uses to exit the bay area. This area is very congested and during periods of low visibility could cause a mid air hazard. Today with visibility at 75 miles or more we had numerous traffic calls which we could not see and one RA alert that bay approach warned us about after the incident was in progress.
Original NASA ASRS Text
Title: MD80 CREW POINTS OUT THE DANGER OF OPERATING IN INTENSE LIGHT ACFT TFC AREAS WHILE FLYING THE MARVN ARR TO OAK.
Narrative: THE ARR BRINGS YOU DOWN LOW OUT OVER THE CENTRAL VALLEY AND EVEN LOWER THROUGH THE SUNOL PASS. WE ARE OVER THE VALLEY BELOW 15000 FT WHICH IS THE MAIN ALTS FOR TFC TRANSITING UP THE VALLEY VFR. WE ALSO COME THROUGH THE SUNOL PASS AT 5000 FT WHICH IS THE EXACT ALT THAT VFR TFC USES TO EXIT THE BAY AREA. THIS AREA IS VERY CONGESTED AND DURING PERIODS OF LOW VISIBILITY COULD CAUSE A MID AIR HAZARD. TODAY WITH VIS AT 75 MILES OR MORE WE HAD NUMEROUS TFC CALLS WHICH WE COULD NOT SEE AND ONE RA ALERT THAT BAY APCH WARNED US ABOUT AFTER THE INCIDENT WAS IN PROGRESS.
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.