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ZKC controller described conflict event at FL350 when aircraft reported cracked windshield; initiated a descent; resulting in less than standard separation.
| Attributes | |
| ACN | 811657 |
| Time | |
| Date | 200811 |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | navaid : fam.vortac |
| State Reference | MD |
| Altitude | msl single value : 35000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Dawn |
| Aircraft 1 | |
| Controlling Facilities | artcc : zkc.artcc tower : mco.tower |
| Operator | common carrier : air carrier |
| Make Model Name | Regional Jet 200 ER&LR |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zkc.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller radar : 18 controller time certified in position1 : 15 |
| ASRS Report | 811657 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller radar : 23 controller time certified in position1 : 18 |
| ASRS Report | 811656 |
| Events | |
| Anomaly | aircraft equipment problem : critical altitude deviation : excursion from assigned altitude conflict : airborne less severe non adherence : required legal separation |
| Independent Detector | atc equipment : conflict alert other controllera other controllerb |
| Resolutory Action | controller : issued advisory |
| Supplementary | |
| Problem Areas | Aircraft ATC Human Performance Flight Crew Human Performance |
| Primary Problem | Aircraft |
Narrative:
Aircraft #1 advised cracked windshield; and needed a descent. (Is level at FL350 when windshield cracks) I advised aircraft #1 of traffic (aircraft #2) at 11 O'clock position and 4 mi. I advise to expect lower when clear. I advise aircraft #1 that if he needs to start his descent on his own; then to turn right to a heading XXX (I do not remember the heading) to miss the traffic. I coordinate with the controller beneath me who owns FL340. I observe aircraft #1 descending on his own. Conflict alert activates displaying 5.X mi (5.1 mi; I do not remember the exact amount).
Original NASA ASRS Text
Title: ZKC CONTROLLER DESCRIBED CONFLICT EVENT AT FL350 WHEN AIRCRAFT REPORTED CRACKED WINDSHIELD; INITIATED A DESCENT; RESULTING IN LESS THAN STANDARD SEPARATION.
Narrative: ACFT #1 ADVISED CRACKED WINDSHIELD; AND NEEDED A DSCNT. (IS LEVEL AT FL350 WHEN WINDSHIELD CRACKS) I ADVISED ACFT #1 OF TFC (ACFT #2) AT 11 O'CLOCK POS AND 4 MI. I ADVISE TO EXPECT LOWER WHEN CLR. I ADVISE ACFT #1 THAT IF HE NEEDS TO START HIS DSCNT ON HIS OWN; THEN TO TURN R TO A HDG XXX (I DO NOT REMEMBER THE HDG) TO MISS THE TFC. I COORDINATE WITH THE CTLR BENEATH ME WHO OWNS FL340. I OBSERVE ACFT #1 DSNDING ON HIS OWN. CONFLICT ALERT ACTIVATES DISPLAYING 5.X MI (5.1 MI; I DO NOT REMEMBER THE EXACT AMOUNT).
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.