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Aircraft Y unauthorized descent to occupied altitude non adherence to ATC clearance had less than standard separation from air carrier X. Pilot deviation.
| Attributes | |
| ACN | 265950 |
| Time | |
| Date | 199403 |
| Day | Tue |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : syr |
| State Reference | NY |
| Altitude | msl bound lower : 11000 msl bound upper : 11000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Operator | common carrier : air taxi |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 135 |
| Flight Phase | cruise other |
| Route In Use | enroute : direct enroute airway : zbw |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air taxi |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 135 |
| Navigation In Use | Other |
| Flight Phase | descent other |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller radar : 4 |
| ASRS Report | 265950 |
| Person 2 | |
| Affiliation | company : air taxi |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | altitude deviation : overshoot conflict : airborne less severe non adherence : required legal separation |
| Independent Detector | other other : unspecified atc |
| Resolutory Action | none taken : detected after the fact |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 6000 vertical : 300 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Aircraft X was issued a climb to 11000 ft. Aircraft Y was issued a clearance to 12000 ft. Aircraft Y was issued traffic (aircraft X) climbing to 11000 ft. Aircraft Y acknowledged the traffic, but continued descent to 11000 ft instead of leveling off at assigned altitude of 12000 ft.
Original NASA ASRS Text
Title: ACFT Y UNAUTH DSCNT TO OCCUPIED ALT NON ADHERENCE TO ATC CLRNC HAD LTSS FROM ACR X. PLTDEV.
Narrative: ACFT X WAS ISSUED A CLB TO 11000 FT. ACFT Y WAS ISSUED A CLRNC TO 12000 FT. ACFT Y WAS ISSUED TFC (ACFT X) CLBING TO 11000 FT. ACFT Y ACKNOWLEDGED THE TFC, BUT CONTINUED DSCNT TO 11000 FT INSTEAD OF LEVELING OFF AT ASSIGNED ALT OF 12000 FT.
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.