 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Phl center observes and takes action to resolve conflict between a descending HS25 and a deping helicopter off an unclted airport. TCAS a factor.
| Attributes | |
| ACN | 527798 |
| Time | |
| Date | 200110 |
| Day | Tue |
| Local Time Of Day | 0001 To 0600 |
| Place | |
| Locale Reference | navaid : mxe.vor |
| State Reference | PA |
| Altitude | msl single value : 4000 |
| Environment | |
| Flight Conditions | Marginal |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : phl.tracon tower : pdk.tower |
| Operator | general aviation : corporate |
| Make Model Name | HS 125 Series 1-600 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | descent : intermediate altitude |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tracon : phl.tracon |
| Operator | general aviation : personal |
| Make Model Name | Helicopter |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : approach |
| ASRS Report | 527798 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : published procedure |
| Independent Detector | atc equipment other atc equipment : radar aircraft equipment : tcas other controllera |
| Resolutory Action | controller : issued new clearance controller : separated traffic flight crew : took precautionary avoidance action |
| Miss Distance | horizontal : 21000 vertical : 700 |
| Supplementary | |
| Problem Areas | Airspace Structure ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Intra Facility Coordination Failure |
Narrative:
The north arrival sector handed off an aircraft (HS25) landing ilg, de, descended to 4000 ft. I observed an aircraft at 4000 ft and 4 mi east of the HS25 and turned him 270 degrees and descended him to 3000 ft. As their courses diverged, I observed another target acquire below the HS25 at 2500 ft. (I had turned the HS25 back on course.) I immediately turned the HS25 back to 220 degrees, and told him to stop his descent. Traffic was issued in both cases and acknowledged 'in sight.' the north.a. Controller had forgotten the helicopter at 4000 ft, stopped the HS25 at 4000 ft because of the 40N airport departure climbing to 3000 ft, no radar at the time.
Original NASA ASRS Text
Title: PHL CTR OBSERVES AND TAKES ACTION TO RESOLVE CONFLICT BETWEEN A DSNDING HS25 AND A DEPING HELI OFF AN UNCLTED ARPT. TCAS A FACTOR.
Narrative: THE NORTH ARRIVAL SECTOR HANDED OFF AN ACFT (HS25) LNDG ILG, DE, DSNDED TO 4000 FT. I OBSERVED AN ACFT AT 4000 FT AND 4 MI EAST OF THE HS25 AND TURNED HIM 270 DEGS AND DSNDED HIM TO 3000 FT. AS THEIR COURSES DIVERGED, I OBSERVED ANOTHER TARGET ACQUIRE BELOW THE HS25 AT 2500 FT. (I HAD TURNED THE HS25 BACK ON COURSE.) I IMMEDIATELY TURNED THE HS25 BACK TO 220 DEGS, AND TOLD HIM TO STOP HIS DSCNT. TFC WAS ISSUED IN BOTH CASES AND ACKNOWLEDGED 'IN SIGHT.' THE N.A. CTLR HAD FORGOTTEN THE HELICOPTER AT 4000 FT, STOPPED THE HS25 AT 4000 FT BECAUSE OF THE 40N ARPT DEP CLIMBING TO 3000 FT, NO RADAR AT THE TIME.
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.