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ZDC controller experienced operational error at approximately FL250 when climb rates of 2 aircraft were misjudged.
| Attributes | |
| ACN | 700134 |
| Time | |
| Date | 200606 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | navaid : pxt.vortac |
| State Reference | MD |
| Altitude | msl bound lower : 25000 msl bound upper : 26000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdc.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | Regional Jet 200 ER&LR |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zdc.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B737-800 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : military controller : radar |
| Experience | controller military : 6 controller radar : 3 controller time certified in position2 : 9 |
| ASRS Report | 700134 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : radar |
| 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 : 21000 vertical : 700 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Aircraft X was climbed to FL250 and handed off and switched to the next sector. Aircraft Y (B738) checked in climbing to FL190 from dca. Aircraft Y was initially climbed to FL230. The sector talking to aircraft X (CRJ2) asked for control to climb to FL270. I observed the climb rate on both aircraft and climbed aircraft Y to FL260. A few moments later; I observed aircraft X slowed his climb rate. I then descended aircraft Y to FL250 when I observed aircraft X out of FL264. I asked aircraft Y to say altitude leaving. Aircraft Y reported leaving FL255 and I observed aircraft X at FL265.
Original NASA ASRS Text
Title: ZDC CTLR EXPERIENCED OPERROR AT APPROX FL250 WHEN CLB RATES OF 2 ACFT WERE MISJUDGED.
Narrative: ACFT X WAS CLBED TO FL250 AND HANDED OFF AND SWITCHED TO THE NEXT SECTOR. ACFT Y (B738) CHKED IN CLBING TO FL190 FROM DCA. ACFT Y WAS INITIALLY CLBED TO FL230. THE SECTOR TALKING TO ACFT X (CRJ2) ASKED FOR CTL TO CLB TO FL270. I OBSERVED THE CLB RATE ON BOTH ACFT AND CLBED ACFT Y TO FL260. A FEW MOMENTS LATER; I OBSERVED ACFT X SLOWED HIS CLB RATE. I THEN DSNDED ACFT Y TO FL250 WHEN I OBSERVED ACFT X OUT OF FL264. I ASKED ACFT Y TO SAY ALT LEAVING. ACFT Y RPTED LEAVING FL255 AND I OBSERVED ACFT X AT FL265.
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.