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Reporter states that clearance was issued to aircraft X to turn final, aircraft Y responded. Reporter attempted to contact aircraft X again, was blocked by aircraft Y. Aircraft X passes behind aircraft Y which triggers a TCASII alert.
| Attributes | |
| ACN | 444054 |
| Time | |
| Date | 199907 |
| Day | Sun |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | navaid : pne.vor |
| State Reference | PA |
| Altitude | msl single value : 4000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Dusk |
| Aircraft 1 | |
| Controlling Facilities | tracon : phl.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | B737 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | ils localizer & glide slope : 27r |
| Flight Phase | descent : intermediate altitude |
| Route In Use | arrival : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tracon : phl.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | B737 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | ils localizer & glide slope : 27r |
| Flight Phase | descent : intermediate altitude |
| Route In Use | arrival : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : radar pilot : private pilot : instrument |
| Experience | controller non radar : 1 controller radar : 12 controller time certified in position1 : 10 flight time total : 3000 |
| ASRS Report | 444054 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : clearance non adherence other other anomaly other |
| Independent Detector | atc equipment : conflict alert aircraft equipment : tcas other controllera other flight crewa |
| Resolutory Action | flight crew : took evasive action none taken : unable |
| Supplementary | |
| Problem Areas | ATC Human Performance Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
Narrative:
Aircraft X issued left 260 degrees to join. Aircraft Y answered. Aircraft X confused, does not turn. ATC issued 2 immediate control instructions which were blocked by or answered for by aircraft Y. Aircraft X passed behind, but triggered TCASII alert.
Original NASA ASRS Text
Title: RPTR STATES THAT CLRNC WAS ISSUED TO ACFT X TO TURN FINAL, ACFT Y RESPONDED. RPTR ATTEMPTED TO CONTACT ACFT X AGAIN, WAS BLOCKED BY ACFT Y. ACFT X PASSES BEHIND ACFT Y WHICH TRIGGERS A TCASII ALERT.
Narrative: ACFT X ISSUED L 260 DEGS TO JOIN. ACFT Y ANSWERED. ACFT X CONFUSED, DOES NOT TURN. ATC ISSUED 2 IMMEDIATE CTL INSTRUCTIONS WHICH WERE BLOCKED BY OR ANSWERED FOR BY ACFT Y. ACFT X PASSED BEHIND, BUT TRIGGERED TCASII ALERT.
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.