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ZMA controller experienced operational error at 5000 ft because of frequency congestion with 1 aircraft remaining on frequency and not descending as expected.
| Attributes | |
| ACN | 698410 |
| Time | |
| Date | 200605 |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | navaid : zbv.vortac |
| State Reference | FO |
| Altitude | msl single value : 5000 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : zma.tracon |
| Operator | general aviation : corporate |
| Make Model Name | Cessna 402/402C/B379 Businessliner/Utiliner |
| Operating Under FAR Part | Part 91 |
| Flight Phase | descent : approach |
| Route In Use | arrival : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tracon : mia.tracon |
| Operator | general aviation : personal |
| Make Model Name | PC-12 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise : level |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller limited radar : 21 controller non radar : 22 controller radar : 20 |
| ASRS Report | 698410 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : far non adherence : required legal separation non adherence : published procedure |
| Independent Detector | atc equipment : conflict alert other controllera |
| Resolutory Action | controller : issued alert controller : issued new clearance |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 29520 vertical : 0 |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Frequency congestion at sector R42 did not allow one of the aircraft to check in when first xferred by mia approach. Aircraft X appears to have not adhered to aim recommendations for rate of descent/advising ATC; but; in fairness; again; the frequency was too congested to make this practical. Mia approach rarely answers voice lines in a prompt manner; which is building a culture that 'works around' this fact. ZMA previously had cpdlc (data link). This program was terminated. If some of the approximately 16 aircraft on frequency (even one) were using cpdlc; it would have helped.
Original NASA ASRS Text
Title: ZMA CTLR EXPERIENCED OPERROR AT 5000 FT BECAUSE OF FREQ CONGESTION WITH 1 ACFT REMAINING ON FREQ AND NOT DSNDING AS EXPECTED.
Narrative: FREQ CONGESTION AT SECTOR R42 DID NOT ALLOW ONE OF THE ACFT TO CHK IN WHEN FIRST XFERRED BY MIA APCH. ACFT X APPEARS TO HAVE NOT ADHERED TO AIM RECOMMENDATIONS FOR RATE OF DSCNT/ADVISING ATC; BUT; IN FAIRNESS; AGAIN; THE FREQ WAS TOO CONGESTED TO MAKE THIS PRACTICAL. MIA APCH RARELY ANSWERS VOICE LINES IN A PROMPT MANNER; WHICH IS BUILDING A CULTURE THAT 'WORKS AROUND' THIS FACT. ZMA PREVIOUSLY HAD CPDLC (DATA LINK). THIS PROGRAM WAS TERMINATED. IF SOME OF THE APPROX 16 ACFT ON FREQ (EVEN ONE) WERE USING CPDLC; IT WOULD HAVE HELPED.
Data retrieved from NASA's ASRS site as of January 2009 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.