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PA28 pilot had an near midair collision with an experimental cirrus SR20 while flying through a local pass in ZOA class east.
| Attributes | |
| ACN | 538783 |
| Time | |
| Date | 200202 |
| Day | Mon |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | intersection : sunol |
| State Reference | CA |
| Altitude | agl single value : 1500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | general aviation : personal |
| Make Model Name | PA-28 Cherokee Arrow IV |
| Operating Under FAR Part | Part 91 |
| Flight Phase | descent : vacating altitude |
| Flight Plan | None |
| Aircraft 2 | |
| Operator | general aviation : personal |
| Make Model Name | Experimental |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise : level |
| Person 1 | |
| Affiliation | other |
| Function | flight crew : single pilot |
| Qualification | pilot : cfi pilot : multi engine pilot : commercial |
| Experience | flight time last 90 days : 8 flight time total : 1030 flight time type : 700 |
| ASRS Report | 538783 |
| Person 2 | |
| Affiliation | other |
| Function | flight crew : single pilot |
| Events | |
| Anomaly | conflict : nmac inflight encounter : weather inflight encounter other non adherence : required legal separation other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : took evasive action none taken : detected after the fact |
| Miss Distance | horizontal : 100 vertical : 5 |
| Supplementary | |
| Problem Areas | Weather Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
Narrative:
There was a broken layer at 4000 ft over altamont pass. I was descending/approaching pao airport. I was double-checking position with respect to VFR chart. The cirrus passed to my right starting to take evasive action (turn to left). I never saw the airplane, I was scanning for traffic and my attention was diverted briefly, while checking map. I was running with anti-collision lights on, but no landing light. Corrective actions: I turned landing light on, and listened to pao tower for departing traffic. How problem arose: I will never fly through altamont pass again when there is a broken cloud base. This 'funnels' traffic 10 mi west to the ground and creates collision hazards throughout this VFR corridor. Contributing factors: not scanning/listening to pao tower early enough. I should never have attempted to fly below broken cloud base.
Original NASA ASRS Text
Title: PA28 PLT HAD AN NMAC WITH AN EXPERIMENTAL CIRRUS SR20 WHILE FLYING THROUGH A LCL PASS IN ZOA CLASS E.
Narrative: THERE WAS A BROKEN LAYER AT 4000 FT OVER ALTAMONT PASS. I WAS DSNDING/APCHING PAO ARPT. I WAS DOUBLE-CHKING POS WITH RESPECT TO VFR CHART. THE CIRRUS PASSED TO MY R STARTING TO TAKE EVASIVE ACTION (TURN TO L). I NEVER SAW THE AIRPLANE, I WAS SCANNING FOR TFC AND MY ATTN WAS DIVERTED BRIEFLY, WHILE CHKING MAP. I WAS RUNNING WITH ANTI-COLLISION LIGHTS ON, BUT NO LNDG LIGHT. CORRECTIVE ACTIONS: I TURNED LNDG LIGHT ON, AND LISTENED TO PAO TWR FOR DEPARTING TFC. HOW PROB AROSE: I WILL NEVER FLY THROUGH ALTAMONT PASS AGAIN WHEN THERE IS A BROKEN CLOUD BASE. THIS 'FUNNELS' TFC 10 MI W TO THE GND AND CREATES COLLISION HAZARDS THROUGHOUT THIS VFR CORRIDOR. CONTRIBUTING FACTORS: NOT SCANNING/LISTENING TO PAO TWR EARLY ENOUGH. I SHOULD NEVER HAVE ATTEMPTED TO FLY BELOW BROKEN CLOUD BASE.
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.