Near midair collision between air carrier medium large transport and GA small aircraft apparently VF...

Attributes
ACN	91805
Time
Date	198807
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : myr
State Reference	SC
Altitude	msl bound lower : 3000 msl bound upper : 3000
Environment
Flight Conditions	Marginal
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : myr
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	descent : approach
Route In Use	approach : straight in
Flight Plan	IFR
Aircraft 2
Make Model Name	Small Aircraft, High Wing, 1 Eng, Fixed Gear
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : cfi pilot : atp
Experience	flight time last 90 days : 180 flight time total : 12000 flight time type : 6000
ASRS Report	91805
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	conflict : nmac inflight encounter : vfr in imc non adherence : far
Independent Detector	other flight crewa other other : unspecified atc
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 400 vertical : 100
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Cleared for ILS 17 at myr on localizer and intercepting G/south at 3000' first officer flying, myr approach called out VFR traffic to our left and below us. I replied 'no contact' since we were in and out of clouds with poor visibility due to clouds and haze. I asked the controllers to confirm the traffic was VFR since I could see no way an aircraft could maintain legal VFR above 2000' in our location (I had just asked approach for an ILS rather than a visual due to poor conditions). The controller then said it appeared the VFR aircraft was climbing and at 3000' 1/2 mi in front of us. Since we were also at 3000' I took the controls, pulled up and turned right just as I saw an small aircraft go by the left side of the aircraft at our altitude. I feel without evasive action a collision may have occurred. The small aircraft obviously was not staying in VFR conditions. Fortunately he had an encoding transponder and the controller was able to give us an accurate position and altitude. All aircraft should have encoding transponders.

Original NASA ASRS Text

Title: NMAC BETWEEN ACR MLG AND GA SMA APPARENTLY VFR IN IMC.

Narrative: CLRED FOR ILS 17 AT MYR ON LOC AND INTERCEPTING G/S AT 3000' F/O FLYING, MYR APCH CALLED OUT VFR TFC TO OUR LEFT AND BELOW US. I REPLIED 'NO CONTACT' SINCE WE WERE IN AND OUT OF CLOUDS WITH POOR VISIBILITY DUE TO CLOUDS AND HAZE. I ASKED THE CTLRS TO CONFIRM THE TFC WAS VFR SINCE I COULD SEE NO WAY AN ACFT COULD MAINTAIN LEGAL VFR ABOVE 2000' IN OUR LOCATION (I HAD JUST ASKED APCH FOR AN ILS RATHER THAN A VISUAL DUE TO POOR CONDITIONS). THE CTLR THEN SAID IT APPEARED THE VFR ACFT WAS CLBING AND AT 3000' 1/2 MI IN FRONT OF US. SINCE WE WERE ALSO AT 3000' I TOOK THE CONTROLS, PULLED UP AND TURNED RIGHT JUST AS I SAW AN SMA GO BY THE LEFT SIDE OF THE ACFT AT OUR ALT. I FEEL WITHOUT EVASIVE ACTION A COLLISION MAY HAVE OCCURRED. THE SMA OBVIOUSLY WAS NOT STAYING IN VFR CONDITIONS. FORTUNATELY HE HAD AN ENCODING TRANSPONDER AND THE CTLR WAS ABLE TO GIVE US AN ACCURATE POS AND ALT. ALL ACFT SHOULD HAVE ENCODING TRANSPONDERS.

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.

Near midair collision between air carrier medium large transport and GA small aircraft apparently VFR in IMC.