Air carrier aircraft made improper traffic pattern entry.

Attributes
ACN	105191
Time
Date	198902
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : pib
State Reference	MS
Altitude	agl bound lower : 1000 agl bound upper : 1000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : personal
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	other
Flight Plan	VFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	other
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : private pilot : instrument
Experience	flight time last 90 days : 30 flight time total : 3000 flight time type : 1000
ASRS Report	105191
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	other spatial deviation
Independent Detector	other flight crewa
Resolutory Action	other
Consequence	Other
Miss Distance	horizontal : 18000 vertical : 100
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

I was approaching the airport in VFR conditions and had received unicom airport advisory. Approach was from the north after cancelling IFR. I was advised by ATC that an aircraft was in trail by approximately 2 tour miles and at a higher altitude. I then entered the left hand traffic pattern on the downwind and as base leg was being turned. A airliner aircraft called final. I observed what I believe to be that aircraft which had been behind me on an approximately 4 mi final. I announced turning base and requested the other aircraft to 'say position.' he then announced that he would be crossing over the field and entering downwind (which he should have done the first time). I realize that scheduled carriers have large costs involved but should be required to comply with traffic patterns at uncontrolled fields.

Original NASA ASRS Text

Title: ACR ACFT MADE IMPROPER TRAFFIC PATTERN ENTRY.

Narrative: I WAS APCHING THE ARPT IN VFR CONDITIONS AND HAD RECEIVED UNICOM ARPT ADVISORY. APCH WAS FROM THE N AFTER CANCELLING IFR. I WAS ADVISED BY ATC THAT AN ACFT WAS IN TRAIL BY APPROX 2 TOUR MILES AND AT A HIGHER ALT. I THEN ENTERED THE LEFT HAND TFC PATTERN ON THE DOWNWIND AND AS BASE LEG WAS BEING TURNED. A AIRLINER ACFT CALLED FINAL. I OBSERVED WHAT I BELIEVE TO BE THAT ACFT WHICH HAD BEEN BEHIND ME ON AN APPROX 4 MI FINAL. I ANNOUNCED TURNING BASE AND REQUESTED THE OTHER ACFT TO 'SAY POS.' HE THEN ANNOUNCED THAT HE WOULD BE XING OVER THE FIELD AND ENTERING DOWNWIND (WHICH HE SHOULD HAVE DONE THE FIRST TIME). I REALIZE THAT SCHEDULED CARRIERS HAVE LARGE COSTS INVOLVED BUT SHOULD BE REQUIRED TO COMPLY WITH TFC PATTERNS AT UNCONTROLLED FIELDS.

Data retrieved from NASA's ASRS site as of August 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.