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ZID controller fails to hear student issue altitude clearance when incorrect altitude assignment is entered into data block.
| Attributes | |
| ACN | 640344 |
| Time | |
| Date | 200412 |
| Day | Mon |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | navaid : abb.vortac |
| State Reference | IN |
| Altitude | msl single value : 15000 |
| Environment | |
| Flight Conditions | IMC |
| Weather Elements | Ice other |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zid.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | Regional Jet 200 ER&LR |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other vortac |
| Flight Phase | descent : intermediate altitude |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zid.artcc |
| Operator | general aviation : corporate |
| Make Model Name | Falcon 900 |
| Operating Under FAR Part | Part 91 |
| Navigation In Use | other vortac |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar instruction : instructor |
| Qualification | controller : radar |
| Experience | controller radar : 11 controller time certified in position1 : 11.5 |
| ASRS Report | 640344 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : radar instruction : trainee |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation |
| Independent Detector | atc equipment : conflict alert other controllera other controllerb |
| Resolutory Action | controller : issued alert controller : issued new clearance |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 18000 vertical : 700 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Had several aircraft inbound to cvg. Because of high winds, compression was beginning to occur and the sector team was advised by the supervisor that we might have to hold aircraft. My trainee assigned aircraft X 15000 ft and entered 16000 ft in the data block. I did not hear this clearance. The trainee later issued aircraft Y 15000 ft and I thought aircraft X was descending to 16000 ft. At some point during this session, the supervisor had also advised us another aircraft we had needed to be issued 250 KTS for spacing to mdw. When I observed aircraft X descending below 16000 ft, I asked pilot to verify assigned altitude. When he replied 16000 ft, the aircraft had passed. I attempted to stop the climb of aircraft Y.
Original NASA ASRS Text
Title: ZID CTLR FAILS TO HEAR STUDENT ISSUE ALT CLRNC WHEN INCORRECT ALT ASSIGNMENT IS ENTERED INTO DATA BLOCK.
Narrative: HAD SEVERAL ACFT INBOUND TO CVG. BECAUSE OF HIGH WINDS, COMPRESSION WAS BEGINNING TO OCCUR AND THE SECTOR TEAM WAS ADVISED BY THE SUPVR THAT WE MIGHT HAVE TO HOLD ACFT. MY TRAINEE ASSIGNED ACFT X 15000 FT AND ENTERED 16000 FT IN THE DATA BLOCK. I DID NOT HEAR THIS CLRNC. THE TRAINEE LATER ISSUED ACFT Y 15000 FT AND I THOUGHT ACFT X WAS DSNDING TO 16000 FT. AT SOME POINT DURING THIS SESSION, THE SUPVR HAD ALSO ADVISED US ANOTHER ACFT WE HAD NEEDED TO BE ISSUED 250 KTS FOR SPACING TO MDW. WHEN I OBSERVED ACFT X DSNDING BELOW 16000 FT, I ASKED PLT TO VERIFY ASSIGNED ALT. WHEN HE REPLIED 16000 FT, THE ACFT HAD PASSED. I ATTEMPTED TO STOP THE CLB OF ACFT Y.
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.