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ZDC developmental controller experienced loss of separation at FL240 when failing to recognize overtake problem; military aircraft in trail of HS125.
| Attributes | |
| ACN | 673060 |
| Time | |
| Date | 200509 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | navaid : hgr.vor |
| State Reference | MD |
| Altitude | msl single value : 24000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdc.artcc |
| Operator | general aviation : corporate |
| Make Model Name | British Aerospace Undifferentiated or Other Model |
| Operating Under FAR Part | Part 91 |
| Navigation In Use | other vortac |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zdc.artcc |
| Operator | other |
| Make Model Name | Fighting Falcon F16 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | VFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : developmental |
| Experience | controller non radar : 7 controller radar : 2 |
| ASRS Report | 673060 |
| Person 2 | |
| Affiliation | company : corporate |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation other anomaly other |
| Independent Detector | atc equipment : conflict alert other controllera |
| Resolutory Action | controller : issued new clearance controller : issued alert flight crew : took evasive action |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 18000 vertical : 500 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Aircraft #1 was climbing out on an airway showing 344 KTS over the ground. Aircraft #2 was approximately 8-9 mi in trail of aircraft 1 showing a ground speed of 244 KTS. Aircraft #1 was climbing to FL290 at 2000 FPM. I climbed aircraft #2 to FL240. Aircraft #2's ground speed constantly showed slower than aircraft #1; but the targets still got closer.
Original NASA ASRS Text
Title: ZDC DEVELOPMENTAL CTLR EXPERIENCED LOSS OF SEPARATION AT FL240 WHEN FAILING TO RECOGNIZE OVERTAKE PROB; MIL ACFT IN TRAIL OF HS125.
Narrative: ACFT #1 WAS CLBING OUT ON AN AIRWAY SHOWING 344 KTS OVER THE GND. ACFT #2 WAS APPROX 8-9 MI IN TRAIL OF ACFT 1 SHOWING A GND SPD OF 244 KTS. ACFT #1 WAS CLBING TO FL290 AT 2000 FPM. I CLBED ACFT #2 TO FL240. ACFT #2'S GND SPD CONSTANTLY SHOWED SLOWER THAN ACFT #1; BUT THE TARGETS STILL GOT CLOSER.
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.