BL17 pilot, while in level flight, had an near midair collision with light twin.

Attributes
ACN	497261
Time
Date	200101
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : mht.airport
State Reference	NH
Altitude	agl single value : 3000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : mht.tracon
Operator	general aviation : personal
Make Model Name	Viking
Operating Under FAR Part	Part 91
Flight Phase	cruise : level
Flight Plan	None
Aircraft 2
Controlling Facilities	tracon : mht.tracon
Make Model Name	Small Aircraft, Low Wing, 2 Eng, Retractable Gear
Person 1
Affiliation	other
Function	flight crew : single pilot
Qualification	pilot : instrument pilot : private pilot : multi engine
Experience	flight time last 90 days : 14 flight time total : 1400 flight time type : 230
ASRS Report	497261
Person 2
Function	flight crew : single pilot
Qualification	pilot : multi engine pilot : private
Events
Anomaly	conflict : nmac non adherence : published procedure
Independent Detector	other flight crewa
Resolutory Action	none taken : insufficient time
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 200 vertical : 150
Supplementary
Problem Areas	Flight Crew Human Performance ATC Human Performance
Primary Problem	Ambiguous

Narrative:

I had departed manchester, nh, airport and was level at 3000 ft on flight following with the controllers at manchester. My heading was approximately 240 degrees and I was almost due north of nashua airport. I looked to my left and saw a small twin engine airplane fly under me and behind me by only hundreds of ft. I was close enough to be able to see the pilots in the other aircraft. When I arrived at my destination, 7b2, I was given a message that the controllers at manchester would like me to call them, and I did. I was VFR at the time of the occurrence. I had told the departure at manchester my final would be 3000 ft and my on course heading would be 240 degrees. I had a squawk assigned by manchester, but do not recall what it was.

Original NASA ASRS Text

Title: BL17 PLT, WHILE IN LEVEL FLT, HAD AN NMAC WITH LIGHT TWIN.

Narrative: I HAD DEPARTED MANCHESTER, NH, ARPT AND WAS LEVEL AT 3000 FT ON FLT FOLLOWING WITH THE CTLRS AT MANCHESTER. MY HDG WAS APPROX 240 DEGS AND I WAS ALMOST DUE N OF NASHUA ARPT. I LOOKED TO MY L AND SAW A SMALL TWIN ENG AIRPLANE FLY UNDER ME AND BEHIND ME BY ONLY HUNDREDS OF FT. I WAS CLOSE ENOUGH TO BE ABLE TO SEE THE PLTS IN THE OTHER ACFT. WHEN I ARRIVED AT MY DEST, 7B2, I WAS GIVEN A MESSAGE THAT THE CTLRS AT MANCHESTER WOULD LIKE ME TO CALL THEM, AND I DID. I WAS VFR AT THE TIME OF THE OCCURRENCE. I HAD TOLD THE DEP AT MANCHESTER MY FINAL WOULD BE 3000 FT AND MY ON COURSE HDG WOULD BE 240 DEGS. I HAD A SQUAWK ASSIGNED BY MANCHESTER, BUT DO NOT RECALL WHAT IT WAS.

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.