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Loss of standard separation when aircraft 1 did not descend as instructed. Controller did not ensure descent was accomplished in a timely manner.
| Attributes | |
| ACN | 275842 |
| Time | |
| Date | 199406 |
| Day | Sat |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : acy |
| State Reference | NJ |
| Altitude | msl bound lower : 3500 msl bound upper : 4000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : acy |
| Operator | common carrier : air taxi |
| Make Model Name | Xingu EMB-121 All Series |
| Operating Under FAR Part | Part 135 |
| Flight Phase | descent other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Skyhawk 172/Cutlass 172 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : radar |
| Experience | controller radar : 1 |
| ASRS Report | 275842 |
| Person 2 | |
| Affiliation | company : air taxi |
| Function | flight crew : single pilot |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation non adherence : published procedure |
| Independent Detector | other controllera |
| Resolutory Action | none taken : anomaly accepted |
| Consequence | Other |
| Miss Distance | horizontal : 6000 vertical : 500 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
A BE20 was established on the ILS runway 13 at atlantic city international. However, even after reducing to final approach speed he was overtaking another aircraft on final. The BE20 I observed at 3500 ft and I turned the aircraft to resequence. After flying 5 mi apparently the BE20 did not continue his descent as instructed to 3000 ft. The result was a loss of separation between the BE20 at 3500 ft and an overflt, a PA28 IFR at 4000 ft. I feel the slowness of the ARTS ii equipment prevented me from seeing that the BE20 had not continued his descent. However, I take responsibility for the situation and will ensure separation in the future.
Original NASA ASRS Text
Title: LOSS OF STANDARD SEPARATION WHEN ACFT 1 DID NOT DSND AS INSTRUCTED. CTLR DID NOT ENSURE DSCNT WAS ACCOMPLISHED IN A TIMELY MANNER.
Narrative: A BE20 WAS ESTABLISHED ON THE ILS RWY 13 AT ATLANTIC CITY INTL. HOWEVER, EVEN AFTER REDUCING TO FINAL APCH SPD HE WAS OVERTAKING ANOTHER ACFT ON FINAL. THE BE20 I OBSERVED AT 3500 FT AND I TURNED THE ACFT TO RESEQUENCE. AFTER FLYING 5 MI APPARENTLY THE BE20 DID NOT CONTINUE HIS DSCNT AS INSTRUCTED TO 3000 FT. THE RESULT WAS A LOSS OF SEPARATION BTWN THE BE20 AT 3500 FT AND AN OVERFLT, A PA28 IFR AT 4000 FT. I FEEL THE SLOWNESS OF THE ARTS II EQUIP PREVENTED ME FROM SEEING THAT THE BE20 HAD NOT CONTINUED HIS DSCNT. HOWEVER, I TAKE RESPONSIBILITY FOR THE SIT AND WILL ENSURE SEPARATION IN THE FUTURE.
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.