Mooney M20J pilot on approach to tta reported an airborne conflict with a B747 departing pob.

Attributes
ACN	1370048
Time
Date	201607
Local Time Of Day	1201-1800
Place
Locale Reference	TTA.Airport
State Reference	NC
Environment
Light	Daylight
Aircraft 1
Make Model Name	M-20 J (201) / Allegro
Operating Under FAR Part	Part 91
Flight Phase	Initial Approach
Route In Use	Other RNAV (GPS) Runway 3
Flight Plan	IFR
Aircraft 2
Make Model Name	B747-400
Operating Under FAR Part	Part 121
Flight Phase	Climb
Flight Plan	IFR
Person 1
Function	Pilot Not Flying Instructor
Qualification	Flight Crew Flight Instructor Flight Crew Commercial Flight Crew Multiengine Flight Crew Instrument
Experience	Flight Crew Last 90 Days 200 Flight Crew Total 3300 Flight Crew Type 200
Events
Anomaly	ATC Issue All Types Conflict Airborne Conflict Inflight Event / Encounter Weather / Turbulence
Miss Distance	Horizontal 2500 Vertical 300

Narrative:

On IFR flight plan cleared for the tta RNAV (GPS) runway 3 approach by fay approach control; inbound on final approach course 029 degrees past iktow (if/IAF) descending from 3;000 ft to 2;100 ft. Asked fay approach to cancel our IFR flight plan. Fay approach acknowledged our cancellation; but asked us to remain on 125.175 for traffic advisories. We were at about 2;300 ft fay approach advised immediate left turn to 270 degrees; climb and maintain 2;500 ft for a boeing 747 at 2;000 ft at our 6 o'clock position. We complied and saw the boeing pass us to our right. Then we advised fay approach we had traffic in sight and could no longer hear approach on our #1 com radio. We tried #2 without luck either. We could see fay transmitting; but no voice came through. We switched back to 127.8 used earlier on our IFR flight plan. We connected and again verified cancelling our IFR flight plan that was acknowledged by fay. Also; we advised we would call fay TRACON on the ground.we did call fay TRACON and they admitted a communication failure on 125.175 ([recent storms] apparently affected the 125.175 frequency through some sort of surge) and the boeing couldn't climb above 2;000 ft due to lost communication with fay departure after taking off from pope aaf. Their assigned heading was 350 degrees which we understand to be standard departure. The safety hazard created results from a large transport aircraft at 2;000 ft on a 350 degree heading crosses right through the final approach course for runway 03 at tta; ILS and RNAV 3 approaches.

Original NASA ASRS Text

Title: Mooney M20J pilot on approach to TTA reported an airborne conflict with a B747 departing POB.

Narrative: On IFR Flight Plan cleared for the TTA RNAV (GPS) RWY 3 Approach by FAY Approach Control; inbound on final approach course 029 degrees past IKTOW (IF/IAF) descending from 3;000 ft to 2;100 ft. Asked FAY Approach to cancel our IFR Flight Plan. FAY Approach acknowledged our cancellation; but asked us to remain on 125.175 for traffic advisories. We were at about 2;300 ft FAY Approach advised immediate left turn to 270 degrees; climb and maintain 2;500 ft for a Boeing 747 at 2;000 ft at our 6 o'clock position. We complied and saw the Boeing pass us to our right. Then we advised FAY Approach we had traffic in sight and could no longer hear Approach on our #1 Com radio. We tried #2 without luck either. We could see FAY transmitting; but no voice came through. We switched back to 127.8 used earlier on our IFR Flight Plan. We connected and again verified cancelling our IFR Flight Plan that was acknowledged by FAY. Also; we advised we would call FAY TRACON on the ground.We did call FAY TRACON and they admitted a communication failure on 125.175 ([recent storms] apparently affected the 125.175 frequency through some sort of surge) and the Boeing couldn't climb above 2;000 ft due to lost communication with FAY Departure after taking off from Pope AAF. Their assigned heading was 350 degrees which we understand to be standard departure. The safety hazard created results from a large transport aircraft at 2;000 ft on a 350 degree heading crosses right through the final approach course for runway 03 at TTA; ILS and RNAV 3 approaches.

Data retrieved from NASA's ASRS site 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.