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ZBW controller experienced operational error when student cleared climbing aircraft through occupied altitude; reporter citing radio problems as contributory.
| Attributes | |
| ACN | 734316 |
| Time | |
| Date | 200704 |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : syr.airport |
| State Reference | NY |
| Altitude | msl single value : 28000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zbw.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B737-500 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zbw.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | A319 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : enroute altitude change |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller radar : 23 |
| ASRS Report | 734316 |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation |
| Independent Detector | atc equipment : conflict alert aircraft equipment : tcas other controllera |
| Resolutory Action | controller : issued alert controller : issued new clearance |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 22200 vertical : 700 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Aircraft Y at FL190 issued clearance to FL280 with aircraft X wbound at FL280. I used the prevention feature to override trainee; but it didn't work; after numerous xmissions on 124.12 didn't broadcast. Known documented frequency outages and problems with 124.12 at rka 2 xmissions to aircraft Y at FL290 broadcast as carry wave with no voice modulation. We need the frequency (124.12) replaced before a more serious event occurs!
Original NASA ASRS Text
Title: ZBW CTLR EXPERIENCED OPERROR WHEN STUDENT CLRED CLIMBING ACFT THROUGH OCCUPIED ALT; REPORTER CITING RADIO PROBLEMS AS CONTRIBUTORY.
Narrative: ACFT Y AT FL190 ISSUED CLRNC TO FL280 WITH ACFT X WBOUND AT FL280. I USED THE PREVENTION FEATURE TO OVERRIDE TRAINEE; BUT IT DIDN'T WORK; AFTER NUMEROUS XMISSIONS ON 124.12 DIDN'T BROADCAST. KNOWN DOCUMENTED FREQ OUTAGES AND PROBS WITH 124.12 AT RKA 2 XMISSIONS TO ACFT Y AT FL290 BROADCAST AS CARRY WAVE WITH NO VOICE MODULATION. WE NEED THE FREQ (124.12) REPLACED BEFORE A MORE SERIOUS EVENT OCCURS!
Data retrieved from NASA's ASRS site as of January 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.