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Controller climbs air carrier aircraft through altitude of large transport with less than standard separation.
| Attributes | |
| ACN | 175429 |
| Time | |
| Date | 199104 |
| Day | Fri |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : bos |
| State Reference | MA |
| Altitude | msl bound lower : 9000 msl bound upper : 10000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | descent other |
| Route In Use | arrival other enroute airway : bos |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | departure other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 6000 flight time type : 600 |
| ASRS Report | 175429 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : published procedure non adherence : required legal separation |
| Independent Detector | atc equipment other atc equipment : unspecified |
| Resolutory Action | controller : issued new clearance other |
| Consequence | Other |
| Miss Distance | horizontal : 4500 vertical : 750 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Bos approach control cleared us to 9000'. Out of 10000', approach control advised expedite to 9000'. We did so and leveled at 9000'. At that time an air carrier flight reported climbing through 9000', and we sighted that aircraft, climbing left to right. Simultaneously approach advised descend to 5000', and we did so expeditiously.
Original NASA ASRS Text
Title: CTLR CLIMBS ACR ACFT THROUGH ALT OF LGT WITH LESS THAN STANDARD SEPARATION.
Narrative: BOS APCH CTL CLRED US TO 9000'. OUT OF 10000', APCH CTL ADVISED EXPEDITE TO 9000'. WE DID SO AND LEVELED AT 9000'. AT THAT TIME AN ACR FLT RPTED CLBING THROUGH 9000', AND WE SIGHTED THAT ACFT, CLBING LEFT TO RIGHT. SIMULTANEOUSLY APCH ADVISED DSND TO 5000', AND WE DID SO EXPEDITIOUSLY.
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.