 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Operational error less than standard separation when controller clears a B757 to climb from 13000 ft before having an E120 2 mi in trail at 14000 ft provide visual separation with the jet.
| Attributes | |
| ACN | 376808 |
| Time | |
| Date | 199708 |
| Day | Fri |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : svm |
| State Reference | MI |
| Altitude | msl bound lower : 13400 msl bound upper : 14000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zob |
| Operator | common carrier : air carrier |
| Make Model Name | B757 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | climbout : intermediate altitude cruise other descent other |
| Route In Use | departure other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Xingu EMB-121 All Series |
| Operating Under FAR Part | Part 135 |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller radar : 7 |
| ASRS Report | 376808 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : published procedure non adherence : required legal separation |
| Independent Detector | other controllera |
| Resolutory Action | flight crew : returned to intended course or assigned course other |
| Consequence | Other |
| Miss Distance | horizontal : 28800 vertical : 600 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
B757 departed dtw climbing to 13000 ft. E120 was en route at 14000 ft. E120 issued traffic 12 O'clock, 1 mi. B757 issued traffic 6 O'clock, 2 mi. E120 reports B757 in sight. Radar controller asked if E120 could maintain visual separation, answered affirmative. B757 told traffic had him in sight and would maintain visual separation then given a climb clearance to FL230. Because of a local restr applying visual separation to B757'2. The B757 was reclred to maintain 13000 ft. The B757 went through 13400 ft before returning to 13000 ft. The error occurred when the radar controller failed to clear the E120 to maintain visual separation.
Original NASA ASRS Text
Title: OPERROR LTSS WHEN CTLR CLRS A B757 TO CLB FROM 13000 FT BEFORE HAVING AN E120 2 MI IN TRAIL AT 14000 FT PROVIDE VISUAL SEPARATION WITH THE JET.
Narrative: B757 DEPARTED DTW CLBING TO 13000 FT. E120 WAS ENRTE AT 14000 FT. E120 ISSUED TFC 12 O'CLOCK, 1 MI. B757 ISSUED TFC 6 O'CLOCK, 2 MI. E120 RPTS B757 IN SIGHT. RADAR CTLR ASKED IF E120 COULD MAINTAIN VISUAL SEPARATION, ANSWERED AFFIRMATIVE. B757 TOLD TFC HAD HIM IN SIGHT AND WOULD MAINTAIN VISUAL SEPARATION THEN GIVEN A CLB CLRNC TO FL230. BECAUSE OF A LCL RESTR APPLYING VISUAL SEPARATION TO B757'2. THE B757 WAS RECLRED TO MAINTAIN 13000 FT. THE B757 WENT THROUGH 13400 FT BEFORE RETURNING TO 13000 FT. THE ERROR OCCURRED WHEN THE RADAR CTLR FAILED TO CLR THE E120 TO MAINTAIN VISUAL SEPARATION.
Data retrieved from NASA's ASRS site as of July 2007 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.