Near midair collision by a B757 with an unrpted piper cub in a rapid descent 15 mi southeast of mia,...

Attributes
ACN	503160
Time
Date	200103
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : mia.airport
State Reference	FL
Altitude	msl bound lower : 3800 msl bound upper : 4200
Environment
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : mia.tracon
Operator	common carrier : air carrier
Make Model Name	B757-200
Operating Under FAR Part	Part 121
Navigation In Use	ils other localizer
Flight Phase	descent : vacating altitude
Route In Use	approach : instrument non precision approach : straight in arrival : on vectors enroute : atlantic
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tracon : mia.tracon
Operator	general aviation : personal
Make Model Name	Piper Single Undifferentiated or Other Model
Operating Under FAR Part	Part 91
Navigation In Use	other
Flight Phase	descent : vacating altitude
Flight Plan	None
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	503160
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : multi engine pilot : instrument
ASRS Report	503162
Events
Anomaly	airspace violation : entry conflict : nmac non adherence : required legal separation non adherence : far
Independent Detector	aircraft equipment : tcas other flight crewa other flight crewb
Resolutory Action	flight crew : took precautionary avoidance action
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 500 vertical : 0
Supplementary
Problem Areas	ATC Human Performance Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Location: 5 DME final localizer runway 30. While under control of mia approach, we were on heading to intercept the runway 30 localizer, and just prior to capturing the localizer, we received a TCASII TA of traffic 11:30 O'clock position and above us in a very steep descent. I slowed my descent through 4200 ft to almost level at 3800 ft. Traffic was 12 O'clock position about 1/2 mi ahead of us and descending rapidly. He passed through our altitude and below us by approximately 500 ft. Advised ATC, who responded he did not have a transponder nor a primary target until moments after our event. We never received a TCASII RA. Suspect the conflict aircraft was an old light single engine piper aircraft.

Original NASA ASRS Text

Title: NMAC BY A B757 WITH AN UNRPTED PIPER CUB IN A RAPID DSCNT 15 MI SE OF MIA, FL.

Narrative: LOCATION: 5 DME FINAL LOC RWY 30. WHILE UNDER CTL OF MIA APCH, WE WERE ON HDG TO INTERCEPT THE RWY 30 LOC, AND JUST PRIOR TO CAPTURING THE LOC, WE RECEIVED A TCASII TA OF TFC 11:30 O'CLOCK POS AND ABOVE US IN A VERY STEEP DSCNT. I SLOWED MY DSCNT THROUGH 4200 FT TO ALMOST LEVEL AT 3800 FT. TFC WAS 12 O'CLOCK POS ABOUT 1/2 MI AHEAD OF US AND DSNDING RAPIDLY. HE PASSED THROUGH OUR ALT AND BELOW US BY APPROX 500 FT. ADVISED ATC, WHO RESPONDED HE DID NOT HAVE A XPONDER NOR A PRIMARY TARGET UNTIL MOMENTS AFTER OUR EVENT. WE NEVER RECEIVED A TCASII RA. SUSPECT THE CONFLICT ACFT WAS AN OLD LIGHT SINGLE ENG PIPER 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 by a B757 with an unrpted piper cub in a rapid descent 15 mi southeast of mia, fl.