Near midair collision between a B727 descending for approach and a light aircraft passing 500 ft bel...

Attributes
ACN	429051
Time
Date	199902
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : cvg.tracon
State Reference	OH
Altitude	msl single value : 4000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : cvg.tracon tower : mia.tower
Operator	common carrier : air carrier
Make Model Name	B727-200
Operating Under FAR Part	Part 121
Flight Phase	descent : intermediate altitude
Route In Use	approach : visual arrival : on vectors
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tracon : cvg.tracon
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : instrument pilot : flight engineer pilot : atp pilot : commercial
Experience	flight time last 90 days : 150 flight time total : 5600 flight time type : 1500
ASRS Report	429051
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation
Independent Detector	aircraft equipment : tcas
Miss Distance	horizontal : 0 vertical : 500
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

Departed florence VOR on a 080 degree heading, descending to 4500 ft, planning on a visual approach to runway 35R at cvg. Approach told us we had a light aircraft at 11-12 O'clock at 3500 ft. Around 12 DME from cvg, approach control said we were clear of VFR traffic. I had the field in sight and we were cleared for a visual approach to runway 36R. Around 4000 ft at 220 KTS (clean confign) the TCASII gave us a TA followed immediately by an RA to check our vertical velocity. I leveled off at 4000 ft and saw on the TCASII display the traffic was 450-500 ft under us. We never saw him! Approach and landing were uneventful. Once again TCASII saved the day! Just one more example of why all aircraft should have a mode C transponder and force the cargo airlines (including mine) to install TCASII! TCASII should be mandatory for all large aircraft!

Original NASA ASRS Text

Title: NMAC BTWN A B727 DSNDING FOR APCH AND A LIGHT ACFT PASSING 500 FT BELOW.

Narrative: DEPARTED FLORENCE VOR ON A 080 DEG HDG, DSNDING TO 4500 FT, PLANNING ON A VISUAL APCH TO RWY 35R AT CVG. APCH TOLD US WE HAD A LIGHT ACFT AT 11-12 O'CLOCK AT 3500 FT. AROUND 12 DME FROM CVG, APCH CTL SAID WE WERE CLR OF VFR TFC. I HAD THE FIELD IN SIGHT AND WE WERE CLRED FOR A VISUAL APCH TO RWY 36R. AROUND 4000 FT AT 220 KTS (CLEAN CONFIGN) THE TCASII GAVE US A TA FOLLOWED IMMEDIATELY BY AN RA TO CHK OUR VERT VELOCITY. I LEVELED OFF AT 4000 FT AND SAW ON THE TCASII DISPLAY THE TFC WAS 450-500 FT UNDER US. WE NEVER SAW HIM! APCH AND LNDG WERE UNEVENTFUL. ONCE AGAIN TCASII SAVED THE DAY! JUST ONE MORE EXAMPLE OF WHY ALL ACFT SHOULD HAVE A MODE C XPONDER AND FORCE THE CARGO AIRLINES (INCLUDING MINE) TO INSTALL TCASII! TCASII SHOULD BE MANDATORY FOR ALL LARGE ACFT!

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.

Near midair collision between a B727 descending for approach and a light aircraft passing 500 ft below.