|37000 Feet||Browse and search NASA's
Aviation Safety Reporting System
|Local Time Of Day||1201 To 1800|
|Locale Reference||navaid : sgd.vortac|
|Altitude||msl single value : 4600|
|Controlling Facilities||tracon : nct.tracon|
|Operator||general aviation : personal|
|Make Model Name||PA-34-200T Turbo Seneca II|
|Operating Under FAR Part||Part 91|
|Flight Phase||climbout : vacating altitude|
|Route In Use||departure : on vectors|
|Make Model Name||Small Aircraft|
|Function||flight crew : single pilot|
|Qualification||pilot : commercial|
pilot : instrument
pilot : multi engine
|Experience||flight time last 90 days : 23|
flight time total : 4968
flight time type : 3421
|Anomaly||conflict : nmac|
non adherence : far
|Independent Detector||other flight crewa|
|Resolutory Action||none taken : insufficient time|
|Miss Distance||horizontal : 0|
vertical : 100
|Problem Areas||Flight Crew Human Performance|
|Primary Problem||Flight Crew Human Performance|
IFR climb out from apc; on ATC vector of 250 degrees. Passing 4600 ft MSL; saw shadow/outline of another aircraft momentarily and directly above; moving from my 9 to 3 O'clock position; so quickly I was unable to take evasive action. It appeared to be a propeller twin; approximately the same size as my aircraft. When I went VMC at 4700 ft MSL; I looked for the other aircraft; but saw nothing. I queried the ATC controller about the incident -- he stated that he 'didn't see anything near' me; but there were 'numerous targets in the napa area.' ATC was quite busy at the time; and would likely have missed an aircraft with its transponder off/inoperative and believe the other aircraft was flying just above the cloud tops; not squawking and talking to anyone -- scary.
Original NASA ASRS Text
Title: PA34 PILOT ON IFR FLIGHT PLAN AND IN IMC REPORTS APPARENT NMAC WITH LIGHT TWIN JUST ABOVE THE CLOUD LAYER.
Narrative: IFR CLBOUT FROM APC; ON ATC VECTOR OF 250 DEGS. PASSING 4600 FT MSL; SAW SHADOW/OUTLINE OF ANOTHER ACFT MOMENTARILY AND DIRECTLY ABOVE; MOVING FROM MY 9 TO 3 O'CLOCK POS; SO QUICKLY I WAS UNABLE TO TAKE EVASIVE ACTION. IT APPEARED TO BE A PROP TWIN; APPROX THE SAME SIZE AS MY ACFT. WHEN I WENT VMC AT 4700 FT MSL; I LOOKED FOR THE OTHER ACFT; BUT SAW NOTHING. I QUERIED THE ATC CTLR ABOUT THE INCIDENT -- HE STATED THAT HE 'DIDN'T SEE ANYTHING NEAR' ME; BUT THERE WERE 'NUMEROUS TARGETS IN THE NAPA AREA.' ATC WAS QUITE BUSY AT THE TIME; AND WOULD LIKELY HAVE MISSED AN ACFT WITH ITS XPONDER OFF/INOP AND BELIEVE THE OTHER ACFT WAS FLYING JUST ABOVE THE CLOUD TOPS; NOT SQUAWKING AND TALKING TO ANYONE -- SCARY.
Data retrieved from NASA's ASRS site as of January 2009 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.