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TRACON's transmitter failed. Aircraft being vectored for a runway 9L visual flew through final approach course and conflicted with another aircraft on final for runway 9R.
| Attributes | |
| ACN | 193316 |
| Time | |
| Date | 199111 |
| Day | Sat |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : mia |
| State Reference | FL |
| Altitude | msl bound lower : 4000 msl bound upper : 4000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : mia tower : ord |
| Operator | common carrier : air carrier |
| Make Model Name | Light Transport, Low Wing, 2 Turboprop Eng |
| Flight Phase | descent : approach |
| Route In Use | approach : visual enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Flight Phase | descent : approach |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 100 flight time total : 6200 flight time type : 900 |
| ASRS Report | 193316 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Events | |
| Anomaly | conflict : airborne less severe other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : insufficient time |
| Consequence | Other |
| Miss Distance | horizontal : 3000 vertical : 100 |
| Supplementary | |
| Primary Problem | Navigational Facility |
| Air Traffic Incident | other |
| Situations | |
| ATC Facility | other physical facility procedure or policy : unspecified |
Narrative:
Inbound to mia from apf on scheduled commuter flight. We were 3000 ft MSL on radar vector for visual approach to 9L at mia. After several heading changes and a climb to 4000 ft for resequencing on final west of mia, were in a turn from north to south when handed off to 124.75 (a different approach frequency). The other controller did not answer myself or 2 other aircraft that were trying to check in with him. I immediately switched back to first controller and monitored second controller (124.75) on #2 communication radio. While this radio confusion was occurring, we continued our last assigned ATC instructions. In doing so, we flew through the approach path of both parallel (9L and 9R) runways and passed directly in front of an aircraft on final at our altitude. We ensured safe separation as I regained contact with 124.75 MHZ controller. Apparently, his transmitter was off the air for about 1 min. There was no mishap, but the possibility for a midair was great in these VMC conditions. I believe there was an equipment problem with ATC as well as a handoff made at a critical time that might have been avoided. Confusion resulted, to say the least. We landed safely on 9L.
Original NASA ASRS Text
Title: TRACON'S XMITTER FAILED. ACFT BEING VECTORED FOR A RWY 9L VISUAL FLEW THROUGH FINAL APCH COURSE AND CONFLICTED WITH ANOTHER ACFT ON FINAL FOR RWY 9R.
Narrative: INBOUND TO MIA FROM APF ON SCHEDULED COMMUTER FLT. WE WERE 3000 FT MSL ON RADAR VECTOR FOR VISUAL APCH TO 9L AT MIA. AFTER SEVERAL HDG CHANGES AND A CLB TO 4000 FT FOR RESEQUENCING ON FINAL W OF MIA, WERE IN A TURN FROM N TO S WHEN HANDED OFF TO 124.75 (A DIFFERENT APCH FREQ). THE OTHER CTLR DID NOT ANSWER MYSELF OR 2 OTHER ACFT THAT WERE TRYING TO CHK IN WITH HIM. I IMMEDIATELY SWITCHED BACK TO FIRST CTLR AND MONITORED SECOND CTLR (124.75) ON #2 COM RADIO. WHILE THIS RADIO CONFUSION WAS OCCURRING, WE CONTINUED OUR LAST ASSIGNED ATC INSTRUCTIONS. IN DOING SO, WE FLEW THROUGH THE APCH PATH OF BOTH PARALLEL (9L AND 9R) RWYS AND PASSED DIRECTLY IN FRONT OF AN ACFT ON FINAL AT OUR ALT. WE ENSURED SAFE SEPARATION AS I REGAINED CONTACT WITH 124.75 MHZ CTLR. APPARENTLY, HIS XMITTER WAS OFF THE AIR FOR ABOUT 1 MIN. THERE WAS NO MISHAP, BUT THE POSSIBILITY FOR A MIDAIR WAS GREAT IN THESE VMC CONDITIONS. I BELIEVE THERE WAS AN EQUIP PROBLEM WITH ATC AS WELL AS A HDOF MADE AT A CRITICAL TIME THAT MIGHT HAVE BEEN AVOIDED. CONFUSION RESULTED, TO SAY THE LEAST. WE LANDED SAFELY ON 9L.
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.