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TRACON controller experienced loss of separation event when misjudging required heavy spacing from preceding heavy arrival on final.
| Attributes | |
| ACN | 870828 |
| Time | |
| Date | 201001 |
| Local Time Of Day | 0001-0600 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Aircraft 1 | |
| Make Model Name | B767 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Final Approach |
| Route In Use | Other Instrument Approach |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | B747 Undifferentiated or Other Model |
| Flight Plan | IFR |
| Person 1 | |
| Function | Supervisor / CIC |
| Events | |
| Anomaly | ATC Issue All Types Deviation - Procedural Published Material / Policy |
Narrative:
Vectored a B747H to the ILS to follow a B767H; had five miles and adjusted speed to keep in trail spacing at four miles. Shipped aircraft to the tower and they sent the B747 around due to what they saw as less than four miles separation. I am going to add a mile to my required separation.
Original NASA ASRS Text
Title: TRACON Controller experienced loss of separation event when misjudging required heavy spacing from preceding heavy arrival on final.
Narrative: Vectored a B747H to the ILS to follow a B767H; had five miles and adjusted speed to keep in trail spacing at four miles. Shipped aircraft to the Tower and they sent the B747 around due to what they saw as less than four miles separation. I am going to add a mile to my required separation.
Data retrieved from NASA's ASRS site as of April 2012 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.