MD88 and DH6 had near midair collision near dab.

Attributes
ACN	420855
Time
Date	199811
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : dab airport : dab
State Reference	FL
Altitude	msl bound lower : 3000 msl bound upper : 3600
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : dab
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other
Flight Phase	descent : approach descent other
Route In Use	arrival other
Flight Plan	IFR
Aircraft 2
Operator	other
Make Model Name	Small Transport
Flight Phase	climbout : intermediate altitude
Flight Plan	None
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 7500 flight time type : 1336
ASRS Report	420855
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : flight engineer pilot : instrument pilot : commercial
Experience	flight time last 90 days : 200 flight time total : 8500 flight time type : 1500
ASRS Report	420856
Events
Anomaly	conflict : nmac inflight encounter : vfr in imc
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : took evasive action other
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 0 vertical : 400
Supplementary
Primary Problem	Flight Crew Human Performance

Narrative:

Air carrier flight XXX atl-dab nov/xa/98. We were being vectored to an ILS runway 7L approach to dab. We were cleared for the approach on an intercept heading to hold 3000 ft until established on the localizer. We were approximately 10 mi from the runway. We got a TCASII TA followed closely by an RA to climb. We climbed immediately to approximately 3600 ft. TCASII and ATC called the aircraft passing under us with 400 ft separation. We were IMC at the time in and out of broken clouds and did not see the traffic. A passenger reported after we landed seeing a high wing twin pass under us. We talked to ATC dab, mr X, after landing and he said it was a twin otter climbing VFR to drop parachuters.

Original NASA ASRS Text

Title: MD88 AND DH6 HAD NMAC NEAR DAB.

Narrative: ACR FLT XXX ATL-DAB NOV/XA/98. WE WERE BEING VECTORED TO AN ILS RWY 7L APCH TO DAB. WE WERE CLRED FOR THE APCH ON AN INTERCEPT HDG TO HOLD 3000 FT UNTIL ESTABLISHED ON THE LOC. WE WERE APPROX 10 MI FROM THE RWY. WE GOT A TCASII TA FOLLOWED CLOSELY BY AN RA TO CLB. WE CLBED IMMEDIATELY TO APPROX 3600 FT. TCASII AND ATC CALLED THE ACFT PASSING UNDER US WITH 400 FT SEPARATION. WE WERE IMC AT THE TIME IN AND OUT OF BROKEN CLOUDS AND DID NOT SEE THE TFC. A PAX RPTED AFTER WE LANDED SEEING A HIGH WING TWIN PASS UNDER US. WE TALKED TO ATC DAB, MR X, AFTER LNDG AND HE SAID IT WAS A TWIN OTTER CLBING VFR TO DROP PARACHUTERS.

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.