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Near midair collision between a DC9-50 on a final ILS approach at the OM and a traffic watch aircraft crossing through the DC9's flight path. The flight crew of the DC9 stopped their descent and climbed in response to the TCASII RA.
| Attributes | |
| ACN | 479980 |
| Time | |
| Date | 200007 |
| Day | Tue |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : phl.airport |
| State Reference | PA |
| Altitude | msl single value : 1700 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : phl.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | DC-9 50 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | ils localizer & glide slope : 9r |
| Flight Phase | descent : approach |
| Route In Use | approach : instrument precision |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tracon : phl.tracon |
| Operator | Other |
| Make Model Name | Small Aircraft, High Wing, 1 Eng, Fixed Gear |
| Operating Under FAR Part | Part 91 |
| Navigation In Use | other |
| Flight Phase | cruise : level |
| Flight Plan | None |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 103 flight time total : 26642 flight time type : 24370 |
| ASRS Report | 479980 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : multi engine pilot : instrument |
| Events | |
| Anomaly | conflict : nmac other anomaly other |
| Independent Detector | aircraft equipment : tcas other flight crewa |
| Resolutory Action | flight crew : took evasive action |
| Consequence | faa : reviewed incident with flight crew |
| Miss Distance | horizontal : 0 vertical : 100 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | other |
Narrative:
Approaching phl, runway 9R from outside the marker, we were cleared for an ILS approach and told to contact the tower at the marker. While I was changing radio frequencys, the first officer (PF) called my attention to a target on the TCASII approaching from the left, indicating 400 ft below us and climbing. Over the OM, the TCASII commanded 'climb, climb.' we began the escape maneuver as the target passed beneath us at an altitude indicated on the TCASII as 100 ft. We never saw the aircraft, nor were we advised of the traffic by any controller until I contacted phl tower after the escape maneuver. I called the phl tower supervisor when we reached the gate. He stated to me that the aircraft in question was a small light airplane flying as a highway traffic reporter and nonchalantly stated 'yeah, that guy's out there every day about this time.' the tower supervisor also stated, approach control should have told us about the traffic.
Original NASA ASRS Text
Title: NMAC BTWN A DC9-50 ON A FINAL ILS APCH AT THE OM AND A TFC WATCH ACFT XING THROUGH THE DC9'S FLT PATH. THE FLC OF THE DC9 STOPPED THEIR DSCNT AND CLBED IN RESPONSE TO THE TCASII RA.
Narrative: APCHING PHL, RWY 9R FROM OUTSIDE THE MARKER, WE WERE CLRED FOR AN ILS APCH AND TOLD TO CONTACT THE TWR AT THE MARKER. WHILE I WAS CHANGING RADIO FREQS, THE FO (PF) CALLED MY ATTN TO A TARGET ON THE TCASII APCHING FROM THE L, INDICATING 400 FT BELOW US AND CLBING. OVER THE OM, THE TCASII COMMANDED 'CLB, CLB.' WE BEGAN THE ESCAPE MANEUVER AS THE TARGET PASSED BENEATH US AT AN ALT INDICATED ON THE TCASII AS 100 FT. WE NEVER SAW THE ACFT, NOR WERE WE ADVISED OF THE TFC BY ANY CTLR UNTIL I CONTACTED PHL TWR AFTER THE ESCAPE MANEUVER. I CALLED THE PHL TWR SUPVR WHEN WE REACHED THE GATE. HE STATED TO ME THAT THE ACFT IN QUESTION WAS A SMALL LIGHT AIRPLANE FLYING AS A HWY TFC RPTR AND NONCHALANTLY STATED 'YEAH, THAT GUY'S OUT THERE EVERY DAY ABOUT THIS TIME.' THE TWR SUPVR ALSO STATED, APCH CTL SHOULD HAVE TOLD US ABOUT THE TFC.
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.