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Phl approach controller is unable to issue VFR traffic to a descending IFR aircraft landing phl because of a blocked frequency.
| Attributes | |
| ACN | 637294 |
| Time | |
| Date | 200411 |
| Day | Mon |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | navaid : ood.vortac |
| State Reference | NJ |
| Altitude | msl bound lower : 4000 msl bound upper : 6000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tracon : phl.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | Regional Jet CL65, Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach |
| Route In Use | arrival : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tracon : phl.tracon |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : radar |
| Experience | controller radar : 22 |
| ASRS Report | 637294 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : far non adherence : required legal separation |
| Independent Detector | atc equipment : conflict alert aircraft equipment : tcas other controllera other flight crewa |
| Resolutory Action | none taken : anomaly accepted none taken : insufficient time |
| Supplementary | |
| Problem Areas | Environmental Factor ATC Human Performance |
| Primary Problem | ATC Human Performance |
Narrative:
I noticed converging VFR traffic (aircraft Z) with aircraft X during issuance of a clearance to another aircraft (aircraft Y). The aircraft Y's readback and a subsequent blocked frequency prevented me from making a timely traffic call to aircraft X about aircraft Z and stopping descent to void aircraft Z.
Original NASA ASRS Text
Title: PHL APCH CTLR IS UNABLE TO ISSUE VFR TFC TO A DSNDING IFR ACFT LNDG PHL BECAUSE OF A BLOCKED FREQ.
Narrative: I NOTICED CONVERGING VFR TFC (ACFT Z) WITH ACFT X DURING ISSUANCE OF A CLRNC TO ANOTHER ACFT (ACFT Y). THE ACFT Y'S READBACK AND A SUBSEQUENT BLOCKED FREQ PREVENTED ME FROM MAKING A TIMELY TFC CALL TO ACFT X ABOUT ACFT Z AND STOPPING DSCNT TO VOID ACFT Z.
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.