An SA365 departing a medical center and suffered an near midair collision with an inbound EC135. Fai...

Attributes
ACN	1190827
Time
Date	201407
Local Time Of Day	1801-2400
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	SA 365 Dauphin 2
Operating Under FAR Part	Part 135
Flight Phase	Initial Climb
Route In Use	Direct
Flight Plan	None
Aircraft 2
Make Model Name	EC135
Operating Under FAR Part	Part 135
Person 1
Function	Pilot Flying Single Pilot
Qualification	Flight Crew Commercial
Experience	Flight Crew Last 90 Days 40 Flight Crew Total 6000 Flight Crew Type 5100
Events
Anomaly	Conflict NMAC
Miss Distance	Horizontal 0 Vertical 300

Narrative:

I departed the medical center to the northwest. Approximately one minute into the flight while climbing to 2;000 MSL; I got a TCAS alert of traffic at 9 o'clock less than a mile. The flight medic who was setting in the co-pilot seat (left seat) saw a helicopter converging with us and announced 'dive'. I immediately lowered the collective. Due to the airframe and position of the other aircraft; I could not see the traffic. Once the other helicopter crossed over top of us; I saw what appeared to be an EC135 through the overhead window. They crossed over the top of us by approximately 300 ft. Due to heavy radio traffic with ATC; I was not in contact with approach yet for traffic advisories.I was monitoring CTAF for the medical center for approximately five minutes prior to takeoff. I did not hear the other aircraft although I did hear at least two other aircraft in the immediate area. I made a radio call announcing my departure from the medical center westbound on CTAF.

Original NASA ASRS Text

Title: An SA365 departing a medical center and suffered an NMAC with an inbound EC135. Failure to employ the local CTAF frequency may have been a factor.

Narrative: I departed the Medical Center to the northwest. Approximately one minute into the flight while climbing to 2;000 MSL; I got a TCAS alert of traffic at 9 o'clock less than a mile. The Flight Medic who was setting in the co-pilot seat (left seat) saw a helicopter converging with us and announced 'Dive'. I immediately lowered the collective. Due to the airframe and position of the other aircraft; I could not see the traffic. Once the other helicopter crossed over top of us; I saw what appeared to be an EC135 through the overhead window. They crossed over the top of us by approximately 300 FT. Due to heavy radio traffic with ATC; I was not in contact with Approach yet for traffic advisories.I was monitoring CTAF for the Medical Center for approximately five minutes prior to takeoff. I did not hear the other aircraft although I did hear at least two other aircraft in the immediate area. I made a radio call announcing my departure from the Medical Center westbound on CTAF.

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.

An SA365 departing a medical center and suffered an near midair collision with an inbound EC135. Failure to employ the local CTAF frequency may have been a factor.