2 smas have a close near midair collision while on final approach.

Attributes
ACN	257351
Time
Date	199311
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : lwm
State Reference	MA
Altitude	msl bound lower : 300 msl bound upper : 300
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : lwm tower : hnl
Operator	general aviation : personal
Make Model Name	Small Aircraft, Low Wing, 1 Eng, Fixed Gear
Flight Phase	descent : approach other
Flight Plan	None
Aircraft 2
Make Model Name	Small Aircraft, Low Wing, 1 Eng, Fixed Gear
Flight Phase	descent : approach other
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : instrument pilot : private
Experience	flight time total : 667
ASRS Report	257351
Person 2
Affiliation	Other
Function	flight crew : single pilot
Events
Anomaly	conflict : nmac
Independent Detector	other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 0 vertical : 50
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

In pattern doing touch and goes. Over radio, an small aircraft a advised there is an small aircraft B under him (me) and breaks off approach. Tower commented that he had mistaken me for small aircraft B. Callback conversation with reporter revealed the following information: reporter is unsure who was to blame for this near midair collision. He was flying touch and goes in a left pattern. He thinks he was doing what he was cleared to do. He thinks the other small aircraft entered final on a dog left from the right. He never saw the other aircraft. He continued his approach and landing when the other aircraft said he '...was peeling off.' he is based at another airport and flew back there after the incident. ATC asked him for no information.

Original NASA ASRS Text

Title: 2 SMAS HAVE A CLOSE NMAC WHILE ON FINAL APCH.

Narrative: IN PATTERN DOING TOUCH AND GOES. OVER RADIO, AN SMA A ADVISED THERE IS AN SMA B UNDER HIM (ME) AND BREAKS OFF APCH. TWR COMMENTED THAT HE HAD MISTAKEN ME FOR SMA B. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR IS UNSURE WHO WAS TO BLAME FOR THIS NMAC. HE WAS FLYING TOUCH AND GOES IN A L PATTERN. HE THINKS HE WAS DOING WHAT HE WAS CLRED TO DO. HE THINKS THE OTHER SMA ENTERED FINAL ON A DOG L FROM THE R. HE NEVER SAW THE OTHER ACFT. HE CONTINUED HIS APCH AND LNDG WHEN THE OTHER ACFT SAID HE '...WAS PEELING OFF.' HE IS BASED AT ANOTHER ARPT AND FLEW BACK THERE AFTER THE INCIDENT. ATC ASKED HIM FOR NO INFO.

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.