Potential conflict. System error.

Attributes
ACN	283198
Time
Date	199409
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : mia
State Reference	FL
Altitude	msl bound lower : 3000 msl bound upper : 3000
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : mia
Operator	common carrier : air carrier
Make Model Name	B727 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	cruise other cruise other descent : approach
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 135
Flight Phase	cruise other cruise other descent : approach
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	283198
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
ASRS Report	283199
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation non adherence other other anomaly other other spatial deviation
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 1000 vertical : 0
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Approach control gave us a late turn to intercept runway 9L localizer while flying mostly in the clouds at 3000 ft MSL. We were overshooting localizer at 3000 ft when we got an RA 'descend, now' advisory. Responded by beginning descent still in a turn. Came out of clouds to see commuter type aircraft at our altitude with his belly up to us indicating he had been overshot to runway 9R localizer also. Advised controller of descent due to RA. Approach control then cleared us to 1500 ft MSL. Approach continued with normal landing.

Original NASA ASRS Text

Title: POTENTIAL CONFLICT. SYS ERROR.

Narrative: APCH CTL GAVE US A LATE TURN TO INTERCEPT RWY 9L LOC WHILE FLYING MOSTLY IN THE CLOUDS AT 3000 FT MSL. WE WERE OVERSHOOTING LOC AT 3000 FT WHEN WE GOT AN RA 'DSND, NOW' ADVISORY. RESPONDED BY BEGINNING DSCNT STILL IN A TURN. CAME OUT OF CLOUDS TO SEE COMMUTER TYPE ACFT AT OUR ALT WITH HIS BELLY UP TO US INDICATING HE HAD BEEN OVERSHOT TO RWY 9R LOC ALSO. ADVISED CTLR OF DSCNT DUE TO RA. APCH CTL THEN CLRED US TO 1500 FT MSL. APCH CONTINUED WITH NORMAL LNDG.

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.