EC135 pilot reports near midair collision with a military helicopter at 2;000 ft east of pittsburgh....

Narrative:

While crossing the allegheny river near millvale at 2;000 ft MSL; I noticed a helicopter in my peripheral vision at my altitude and heading directly for me on a collision course. I took evasive action by climbing abruptly. The helicopter which appeared to be a military attack helicopter such as an ah-64 did not appear to make any adjustments to his course or altitude and passed directly under me at less than 50 ft. He had not made any transmissions on 123.025 and I had not received TCAS alerts on his position. I had all position lights; strobe lights; and skid landing lights on.the subject aircraft had apparently departed agc and had been given traffic alerts by agc tower. Maybe tower could advise transient aircraft to monitor downtown common on 123.025 when leaving their control.

Original NASA ASRS Text

Title: EC135 pilot reports NMAC with a military helicopter at 2;000 FT east of Pittsburgh. An evasive action climb is initiated with the AH64 passing 50 FT below the EC135.

Narrative: While crossing the Allegheny river near Millvale at 2;000 FT MSL; I noticed a helicopter in my peripheral vision at my altitude and heading directly for me on a collision course. I took evasive action by climbing abruptly. The helicopter which appeared to be a military attack helicopter such as an AH-64 did not appear to make any adjustments to his course or altitude and passed directly under me at less than 50 FT. He had not made any transmissions on 123.025 and I had not received TCAS alerts on his position. I had all position lights; strobe lights; and skid landing lights on.The subject aircraft had apparently departed AGC and had been given traffic alerts by AGC Tower. Maybe Tower could advise transient aircraft to monitor downtown common on 123.025 when leaving their control.

Data retrieved from NASA's ASRS site as of April 2012 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.

Attributes
ACN	924688
Time
Date	201012
Local Time Of Day	1801-2400
Place
Locale Reference	AGC.Airport
State Reference	PA
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Make Model Name	EC135
Operating Under FAR Part	Part 135
Flight Phase	Cruise
Aircraft 2
Make Model Name	AH-64 Apache
Operating Under FAR Part	Part 91
Flight Phase	Cruise
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Conflict NMAC
Miss Distance	Horizontal 0 Vertical 50

EC135 pilot reports near midair collision with a military helicopter at 2;000 ft east of pittsburgh. An evasive action climb is initiated with the AH64 passing 50 ft below the EC135.