 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Instructor approach controller judged responsible for loss of separation between an small transport and a B747 1 mi from runway at 400 ft due to the aircraft X deviating from clearance routing.
| Attributes | |
| ACN | 542455 |
| Time | |
| Date | 200203 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : anc.airport |
| State Reference | AK |
| Altitude | msl single value : 400 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : cle.tower |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach |
| Route In Use | approach : svfr arrival : on vectors |
| Flight Plan | VFR |
| Aircraft 2 | |
| Controlling Facilities | tracon : a11.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | B747 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : approach instruction : instructor |
| Qualification | controller : radar |
| Experience | controller non radar : 6 controller radar : 15 controller time certified in position1 : 12 |
| ASRS Report | 542455 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : approach instruction : trainee |
| Events | |
| Anomaly | conflict : airborne critical inflight encounter : weather non adherence : clearance non adherence : required legal separation other spatial deviation |
| Independent Detector | atc equipment other atc equipment : radar other controllera |
| Resolutory Action | none taken : insufficient time none taken : anomaly accepted |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 3000 vertical : 300 |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance ATC Human Performance |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Training was in progress. Aircraft #1 was issued SVFR approach without actual 'cleared into anc class C' phraseology, was issued 'direct' to a point. Aircraft #1 elected to deviate from instruction and flew a published VFR arrival. Direct was needed for separation with aircraft #2, separation was lost and the controller was issued responsibility for loss of separation, which, if aircraft #1 did as instructed, would have been retained.
Original NASA ASRS Text
Title: INSTRUCTOR APCH CTLR JUDGED RESPONSIBLE FOR LOSS OF SEPARATION BTWN AN SMT AND A B747 1 MI FROM RWY AT 400 FT DUE TO THE ACFT X DEVIATING FROM CLRNC ROUTING.
Narrative: TRAINING WAS IN PROGRESS. ACFT #1 WAS ISSUED SVFR APCH WITHOUT ACTUAL 'CLRED INTO ANC CLASS C' PHRASEOLOGY, WAS ISSUED 'DIRECT' TO A POINT. ACFT #1 ELECTED TO DEVIATE FROM INSTRUCTION AND FLEW A PUBLISHED VFR ARR. DIRECT WAS NEEDED FOR SEPARATION WITH ACFT #2, SEPARATION WAS LOST AND THE CTLR WAS ISSUED RESPONSIBILITY FOR LOSS OF SEPARATION, WHICH, IF ACFT #1 DID AS INSTRUCTED, WOULD HAVE BEEN RETAINED.
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.