GA small aircraft cut an aircraft out of the pattern at a non tower airport unicom.

Attributes
ACN	147723
Time
Date	199005
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : 6b6
State Reference	MA
Altitude	agl bound lower : 1000 agl bound upper : 1000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : personal
Make Model Name	Small Aircraft, Low Wing, 1 Eng, Fixed Gear
Flight Phase	other
Flight Plan	None
Aircraft 2
Make Model Name	Small Aircraft
Flight Phase	other
Route In Use	approach : straight in
Flight Plan	None
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : private
Experience	flight time last 90 days : 15 flight time total : 95 flight time type : 92
ASRS Report	147723
Person 2
Affiliation	Other
Function	flight crew : single pilot
Events
Anomaly	conflict : airborne less severe other spatial deviation
Independent Detector	other flight crewa other other : unspecified
Resolutory Action	other
Consequence	Other
Miss Distance	horizontal : 4500 vertical : 0
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	other

Narrative:

While approaching minuteman ma airport near nashua, the CTAF 122.8 was extremely congested. Even while over the uncontrolled airport at 1500' AGL I could not get through to unicom except as broken garbles received from them. I could see no planes in the pattern but could see the tetrahedron pointing out the runway. I departed the area, descended to 1000' AGL and made a 45 degree downwind entry, calling each action on the radio (probably only adding to the garble). I then turned base, and then final, calling on the radio. After turning final, a plane called out, 'didn't you see me on long final?' I did not, and he went around the pattern. He was sufficiently behind me that I had completed my landing roll and turned off the runway to see him going around at the other end of the field, so I think he had more than 4 or 5000' of sep. However, I feel that part of the problem was the congestion of the radio frequency to the point of unusability.

Original NASA ASRS Text

Title: GA SMA CUT AN ACFT OUT OF THE PATTERN AT A NON TWR ARPT UNICOM.

Narrative: WHILE APCHING MINUTEMAN MA ARPT NEAR NASHUA, THE CTAF 122.8 WAS EXTREMELY CONGESTED. EVEN WHILE OVER THE UNCONTROLLED ARPT AT 1500' AGL I COULD NOT GET THROUGH TO UNICOM EXCEPT AS BROKEN GARBLES RECEIVED FROM THEM. I COULD SEE NO PLANES IN THE PATTERN BUT COULD SEE THE TETRAHEDRON POINTING OUT THE RWY. I DEPARTED THE AREA, DSNDED TO 1000' AGL AND MADE A 45 DEG DOWNWIND ENTRY, CALLING EACH ACTION ON THE RADIO (PROBABLY ONLY ADDING TO THE GARBLE). I THEN TURNED BASE, AND THEN FINAL, CALLING ON THE RADIO. AFTER TURNING FINAL, A PLANE CALLED OUT, 'DIDN'T YOU SEE ME ON LONG FINAL?' I DID NOT, AND HE WENT AROUND THE PATTERN. HE WAS SUFFICIENTLY BEHIND ME THAT I HAD COMPLETED MY LNDG ROLL AND TURNED OFF THE RWY TO SEE HIM GOING AROUND AT THE OTHER END OF THE FIELD, SO I THINK HE HAD MORE THAN 4 OR 5000' OF SEP. HOWEVER, I FEEL THAT PART OF THE PROB WAS THE CONGESTION OF THE RADIO FREQ TO THE POINT OF UNUSABILITY.

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.