 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
ZBW instructor controller described operational error when student underestimated the climb rate of an aircraft and lost separation; corrective action issued but too late to save separation.
| Attributes | |
| ACN | 810167 |
| Time | |
| Date | 200810 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | navaid : mht.vor |
| State Reference | NH |
| Altitude | msl single value : 20000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zbw.artcc |
| Operator | general aviation : corporate |
| Make Model Name | Gulfstream 200 [G200] (IAI 1126 Galaxy) |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zbw.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | EMB ERJ 170/175 ER&LR |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar instruction : instructor |
| Qualification | controller : radar |
| Experience | controller limited radar : 21 controller radar : 18 flight time total : 30 |
| ASRS Report | 810167 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : radar observation : observer |
| ASRS Report | 810168 |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation |
| Independent Detector | atc equipment : conflict alert other controllera other controllerb other other : radar assoc 3 |
| Resolutory Action | controller : issued alert controller : issued new clearance flight crew : took evasive action |
| Consequence | other |
| Miss Distance | horizontal : 24000 vertical : 200 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Trainee climbed aircraft #1 to FL230 where aircraft #2 was only leaving FL203. Aircraft #1 outclbed aircraft #2 and FL200 was reissued. Aircraft #1 questioned altitude clearance and was reissued FL200. Separation was lost. Supplemental information from acn 810166: trainee issued altitude that put aircraft in conflict trainer and I told trainee clearance was bad. Trainee issued amended altitude which pilot questioned. Aircraft went through new altitude (clearance given late); then corrected.
Original NASA ASRS Text
Title: ZBW INSTRUCTOR CTLR DESCRIBED OPERROR WHEN STUDENT UNDERESTIMATED THE CLB RATE OF AN ACFT AND LOST SEPARATION; CORRECTIVE ACTION ISSUED BUT TOO LATE TO SAVE SEPARATION.
Narrative: TRAINEE CLBED ACFT #1 TO FL230 WHERE ACFT #2 WAS ONLY LEAVING FL203. ACFT #1 OUTCLBED ACFT #2 AND FL200 WAS REISSUED. ACFT #1 QUESTIONED ALT CLRNC AND WAS REISSUED FL200. SEPARATION WAS LOST. SUPPLEMENTAL INFO FROM ACN 810166: TRAINEE ISSUED ALT THAT PUT ACFT IN CONFLICT TRAINER AND I TOLD TRAINEE CLRNC WAS BAD. TRAINEE ISSUED AMENDED ALT WHICH PLT QUESTIONED. ACFT WENT THROUGH NEW ALT (CLRNC GIVEN LATE); THEN CORRECTED.
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.