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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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Attributes | |
ACN | 116032 |
Time | |
Date | 198907 |
Day | Wed |
Local Time Of Day | 0601 To 1200 |
Place | |
Locale Reference | atc facility : anc |
State Reference | AK |
Altitude | msl bound lower : 14000 msl bound upper : 14000 |
Environment | |
Flight Conditions | Mixed |
Light | Daylight |
Aircraft 1 | |
Controlling Facilities | tracon : anc |
Operator | other |
Make Model Name | Fighter |
Flight Phase | cruise other |
Route In Use | departure other |
Flight Plan | IFR |
Aircraft 2 | |
Operator | other |
Make Model Name | Fighter |
Flight Phase | descent other |
Route In Use | arrival other |
Flight Plan | IFR |
Person 1 | |
Affiliation | government : faa |
Function | controller : approach |
Qualification | controller : radar |
ASRS Report | 116032 |
Person 2 | |
Affiliation | government : military |
Function | flight crew : single pilot |
Qualification | pilot : military |
Events | |
Anomaly | other anomaly other |
Independent Detector | other controllera |
Resolutory Action | none taken : anomaly accepted |
Consequence | faa : investigated |
Supplementary | |
Primary Problem | ATC Human Performance |
Air Traffic Incident | other |
Narrative:
I was working the north radar position at anc ATC tower and handed off a flight of 6 fgt's in a nonstandard formation to zan. An arrival aircraft was cleared through the last aircraft in this flight. I observed a mode C only readout which was verified and the arrival crossed in front of the last aircraft with approximately 300' to 400' vertical separation. I attempted to contact the center controller to issue a turn to avoid the departure. I immediately notified my supervisor who notified the area supervisor at anc zan. It is my understanding that this error was investigated by the supervisor at zan and data reduction indicated no error occurred. I personally observed this error as well as my handoff man. The aircraft passed each other with 300' and closing within my airspace lateral confines. The nonstandard formation was 8 mi long and covered approximately 5000' of airspace while climbing. This error was caused by many factors sector overload, military procedures, and poor supervision.
Original NASA ASRS Text
Title: A DEPARTING FGT CAME IN CLOSE PROX TO AN ARRIVING FGT DURING HANDOFF.
Narrative: I WAS WORKING THE N RADAR POSITION AT ANC ATC TWR AND HANDED OFF A FLT OF 6 FGT'S IN A NONSTANDARD FORMATION TO ZAN. AN ARR ACFT WAS CLRED THROUGH THE LAST ACFT IN THIS FLT. I OBSERVED A MODE C ONLY READOUT WHICH WAS VERIFIED AND THE ARR CROSSED IN FRONT OF THE LAST ACFT WITH APPROX 300' TO 400' VERTICAL SEPARATION. I ATTEMPTED TO CONTACT THE CENTER CTLR TO ISSUE A TURN TO AVOID THE DEP. I IMMEDIATELY NOTIFIED MY SUPVR WHO NOTIFIED THE AREA SUPVR AT ANC ZAN. IT IS MY UNDERSTANDING THAT THIS ERROR WAS INVESTIGATED BY THE SUPVR AT ZAN AND DATA REDUCTION INDICATED NO ERROR OCCURRED. I PERSONALLY OBSERVED THIS ERROR AS WELL AS MY HANDOFF MAN. THE ACFT PASSED EACH OTHER WITH 300' AND CLOSING WITHIN MY AIRSPACE LATERAL CONFINES. THE NONSTANDARD FORMATION WAS 8 MI LONG AND COVERED APPROX 5000' OF AIRSPACE WHILE CLIMBING. THIS ERROR WAS CAUSED BY MANY FACTORS SECTOR OVERLOAD, MIL PROCS, AND POOR SUPERVISION.
Data retrieved from NASA's ASRS site as of August 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.