 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
ZOB controller coordinates different inbound LOA altitude for arrival traffic but descends aircraft to lower altitude causing a traffic conflict.
| Attributes | |
| ACN | 512935 |
| Time | |
| Date | 200106 |
| Day | Fri |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | intersection : grace |
| State Reference | PA |
| Altitude | msl bound lower : 8000 msl bound upper : 9000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Dawn |
| Aircraft 1 | |
| Controlling Facilities | artcc : zob.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | SF 340A |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Route In Use | arrival star : grace 2 |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zob.artcc |
| Operator | common carrier : air taxi |
| Make Model Name | King Air C90 E90 |
| Operating Under FAR Part | Part 135 |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller radar : 16 flight time total : 170 |
| ASRS Report | 512935 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation non adherence : published procedure |
| Independent Detector | other controllera |
| Resolutory Action | none taken : detected after the fact |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 8400 vertical : 500 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Propellers cross grace intersection at 8000 ft per LOA. Got approval from pit approach to clear one in at 9000 ft, because they weren't busy and it saved a vector. I put 9000 ft in the data block, but issued 8000 ft and didn't catch it. I even issued traffic to the aircraft. I guess I gave him 8000 ft out of habit and never caught the readback.
Original NASA ASRS Text
Title: ZOB CTLR COORDINATES DIFFERENT INBOUND LOA ALT FOR ARR TFC BUT DSNDS ACFT TO LOWER ALT CAUSING A TFC CONFLICT.
Narrative: PROPS CROSS GRACE INTXN AT 8000 FT PER LOA. GOT APPROVAL FROM PIT APCH TO CLR ONE IN AT 9000 FT, BECAUSE THEY WEREN'T BUSY AND IT SAVED A VECTOR. I PUT 9000 FT IN THE DATA BLOCK, BUT ISSUED 8000 FT AND DIDN'T CATCH IT. I EVEN ISSUED TFC TO THE ACFT. I GUESS I GAVE HIM 8000 FT OUT OF HABIT AND NEVER CAUGHT THE READBACK.
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.