 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
ZID controller experienced operational error at approximately FL340 issuing descent clearance through occupied altitude; corrective action too late.
| Attributes | |
| ACN | 783874 |
| Time | |
| Date | 200804 |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | navaid : pxv.vortac |
| State Reference | IN |
| Altitude | msl bound lower : 34000 msl bound upper : 34600 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zid.artcc tracon : zzz.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | MD-81 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zid.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B737-800 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller radar : 20 controller time certified in position1 : 17 |
| ASRS Report | 783874 |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation |
| Independent Detector | atc equipment : conflict alert other controllera |
| Resolutory Action | controller : issued new clearance controller : issued alert flight crew : took precautionary avoidance action |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 600 vertical : 1800 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Air carrier Y proceeding direct cvg and landing cle and air carrier X on J29 to pxv and landing dfw. Air carrier Y had traffic at FL350 in sector 76's (ZID) airspace. I issued clearance to FL350 on air carrier Y. Air carrier X was at FL340 and I overlooked him at air carrier Y's 11 O'clock position and 5 mi. Radar associate questioned my clearance about 10 seconds or so after issuance. I amended air carrier Y to FL350 and issued a turn to a 270 degree heading to air carrier X.
Original NASA ASRS Text
Title: ZID CTLR EXPERIENCED OPERROR AT APPROX FL340 ISSUING DESCENT CLRNC THROUGH OCCUPIED ALT; CORRECTIVE ACTION TOO LATE.
Narrative: ACR Y PROCEEDING DIRECT CVG AND LNDG CLE AND ACR X ON J29 TO PXV AND LNDG DFW. ACR Y HAD TFC AT FL350 IN SECTOR 76'S (ZID) AIRSPACE. I ISSUED CLRNC TO FL350 ON ACR Y. ACR X WAS AT FL340 AND I OVERLOOKED HIM AT ACR Y'S 11 O'CLOCK POS AND 5 MI. RADAR ASSOCIATE QUESTIONED MY CLRNC ABOUT 10 SECONDS OR SO AFTER ISSUANCE. I AMENDED ACR Y TO FL350 AND ISSUED A TURN TO A 270 DEG HDG TO ACR X.
Data retrieved from NASA's ASRS site as of May 2009 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.