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Captain of mdt air carrier aircraft initiated an immediate climb to avoid an unexpected non controled traffic in IMC conditions at the same altitude.
| Attributes | |
| ACN | 207137 |
| Time | |
| Date | 199203 |
| Day | Thu |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : dfw |
| State Reference | TX |
| Altitude | msl bound lower : 4000 msl bound upper : 4000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : dfw tracon : rdu |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Transport, Low Wing, 2 Turboprop Eng |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Small Transport, Low Wing, 2 Recip Eng |
| Flight Phase | cruise other |
| Flight Plan | None |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 240 flight time total : 15000 |
| ASRS Report | 207137 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Events | |
| Anomaly | conflict : nmac inflight encounter : vfr in imc non adherence : far other anomaly other |
| Independent Detector | atc equipment other atc equipment : unspecified other controllera other flight crewa |
| Resolutory Action | controller : issued new clearance flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | horizontal : 0 vertical : 200 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
Narrative:
On departure out of dfw, northbound at 4000 ft MSL, approximately 24 DME and approximately crossing the dfw 015 degree radial we were notified of unident traffic at 12 oþclock northbound, and appeared to be climbing. We were also cleared to 8000 ft MSL in the same transmission. We were IMC in and out of a 4000 ft broken layer. I then noticed a light twin directly ahead of us. We initiated a rapid climb to 8000 ft. Traffic appeared to be level or in a shallow climb. It þappearedþ that traffic was VFR and climbed through the broken layer and through the 4000 ft floor of the dfw TCA. Recently, the TCA floor was lowered to 4000 ft MSL which helps propeller departures out of dfw. But due to many GA airports, and numerous VFR traffic in dfw area, 4000 ft is still too low to depart IFR high performance propeller-driven traffic. Also departure frequency 124.3 is saturated handling VFR, propeller IFR, and love field traffic.
Original NASA ASRS Text
Title: CAPT OF MDT ACR ACFT INITIATED AN IMMEDIATE CLB TO AVOID AN UNEXPECTED NON CTLED TFC IN IMC CONDITIONS AT THE SAME ALT.
Narrative: ON DEP OUT OF DFW, NBOUND AT 4000 FT MSL, APPROX 24 DME AND APPROX XING THE DFW 015 DEG RADIAL WE WERE NOTIFIED OF UNIDENT TFC AT 12 OþCLOCK NBOUND, AND APPEARED TO BE CLBING. WE WERE ALSO CLRED TO 8000 FT MSL IN THE SAME XMISSION. WE WERE IMC IN AND OUT OF A 4000 FT BROKEN LAYER. I THEN NOTICED A LIGHT TWIN DIRECTLY AHEAD OF US. WE INITIATED A RAPID CLB TO 8000 FT. TFC APPEARED TO BE LEVEL OR IN A SHALLOW CLB. IT þAPPEAREDþ THAT TFC WAS VFR AND CLBED THROUGH THE BROKEN LAYER AND THROUGH THE 4000 FT FLOOR OF THE DFW TCA. RECENTLY, THE TCA FLOOR WAS LOWERED TO 4000 FT MSL WHICH HELPS PROP DEPS OUT OF DFW. BUT DUE TO MANY GA ARPTS, AND NUMEROUS VFR TFC IN DFW AREA, 4000 FT IS STILL TOO LOW TO DEPART IFR HIGH PERFORMANCE PROP-DRIVEN TFC. ALSO DEP FREQ 124.3 IS SATURATED HANDLING VFR, PROP IFR, AND LOVE FIELD 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.