Narrative:

Departed runway 17 mht. Given right turn to 060 degrees, climb to 10000 ft. This was amended to 040 degrees, climb 10000 ft. Piper warrior traffic 1-2 O'clock position on rollout, 6000 ft. Traffic called us in sight, was instructed to remain visual on us. We were then cleared direct ene, 10000 ft (approximately 060 degree heading). We still did not see the traffic. First officer asked for update on its location. First officer then called 'there he is.' I saw the traffic at 12 O'clock position, slightly higher than us, in a very nose low attitude, angle of bank approximately 45-50 degrees, right hand turn. I pulled aft on yoke to increase separation. He passed underneath, fairly close. Reconfirmed our clearance of direct ene, 10000 ft and controller replied in the 'affirmative.' this GA pilot either lost sight of us and didn't tell the controller or has no experience in judging angles and closure rates. As a 121 supplemental cargo carrier we should have been included in the original TCASII mandate, and there is no excuse for this.

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Original NASA ASRS Text

Title: A DEPARTING B727-200 DEPARTING MHT ENCOUNTERS AN NMAC WITH A PA28. FLC COMPLAINS ABOUT LACK OF TCASII ON CARGO ACFT TO HELP PREVENT NMACS FROM OCCURRING.

Narrative: DEPARTED RWY 17 MHT. GIVEN R TURN TO 060 DEGS, CLB TO 10000 FT. THIS WAS AMENDED TO 040 DEGS, CLB 10000 FT. PIPER WARRIOR TFC 1-2 O'CLOCK POS ON ROLLOUT, 6000 FT. TFC CALLED US IN SIGHT, WAS INSTRUCTED TO REMAIN VISUAL ON US. WE WERE THEN CLRED DIRECT ENE, 10000 FT (APPROX 060 DEG HDG). WE STILL DID NOT SEE THE TFC. FO ASKED FOR UPDATE ON ITS LOCATION. FO THEN CALLED 'THERE HE IS.' I SAW THE TFC AT 12 O'CLOCK POS, SLIGHTLY HIGHER THAN US, IN A VERY NOSE LOW ATTITUDE, ANGLE OF BANK APPROX 45-50 DEGS, R HAND TURN. I PULLED AFT ON YOKE TO INCREASE SEPARATION. HE PASSED UNDERNEATH, FAIRLY CLOSE. RECONFIRMED OUR CLRNC OF DIRECT ENE, 10000 FT AND CTLR REPLIED IN THE 'AFFIRMATIVE.' THIS GA PLT EITHER LOST SIGHT OF US AND DIDN'T TELL THE CTLR OR HAS NO EXPERIENCE IN JUDGING ANGLES AND CLOSURE RATES. AS A 121 SUPPLEMENTAL CARGO CARRIER WE SHOULD HAVE BEEN INCLUDED IN THE ORIGINAL TCASII MANDATE, AND THERE IS NO EXCUSE FOR THIS.

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.