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ZTL controller experienced operational error at FL270 when issued altitude differed from altitude displayed in data block and air carrier was assigned occupied altitude.
| Attributes | |
| ACN | 668407 |
| Time | |
| Date | 200508 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : rmg.airport |
| State Reference | GA |
| Altitude | msl single value : 27000 |
| Environment | |
| Flight Conditions | Marginal |
| Weather Elements | Rain Thunderstorm |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : ztl.artcc |
| Operator | other |
| Make Model Name | Military |
| Operating Under FAR Part | Part 91 |
| Flight Phase | climbout : initial |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : ztl.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B737-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| ASRS Report | 668407 |
| Person 2 | |
| Affiliation | government : military |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation |
| Independent Detector | atc equipment : conflict alert other controllera |
| Resolutory Action | controller : issued alert controller : issued new clearance |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 15000 vertical : 700 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
I entered an interim altitude of FL260 in aircraft X's data block. The tape revealed that I had cleared aircraft X to FL270. I subsequently cleared air carrier Y to FL270. I had been concerned that aircraft X might have needed FL270 as a final as the aircraft was not rvsm capable. That may have been why aircraft X was inadvertently climbed to FL270.
Original NASA ASRS Text
Title: ZTL CTLR EXPERIENCED OPERROR AT FL270 WHEN ISSUED ALT DIFFERED FROM ALT DISPLAYED IN DATA BLOCK AND ACR WAS ASSIGNED OCCUPIED ALT.
Narrative: I ENTERED AN INTERIM ALT OF FL260 IN ACFT X'S DATA BLOCK. THE TAPE REVEALED THAT I HAD CLRED ACFT X TO FL270. I SUBSEQUENTLY CLRED ACR Y TO FL270. I HAD BEEN CONCERNED THAT ACFT X MIGHT HAVE NEEDED FL270 AS A FINAL AS THE ACFT WAS NOT RVSM CAPABLE. THAT MAY HAVE BEEN WHY ACFT X WAS INADVERTENTLY CLBED TO FL270.
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.