Narrative:

The following incident occurred during a flight from oak to gri. Shortly after being cleared for a visual approach to gri by ZMP, I canceled my IFR flight plan and began maneuvering to enter the traffic pattern at gri. My first officer broadcast our position and intentions on the CTAF frequency several times during our approach to the airport beginning at about 9 mi northwest of the airport. The airport control tower had closed for the evening. During this time we heard no other aircraft on CTAF respond or report position. At about 4 mi northwest of gri a single engine cessna (a 152 or 172 I think) appeared at our 11 O'clock position coming toward us from the opposite direction. It was slightly above our altitude. I pitched down to increase the vertical separation between us. The cessna then passed over us and did not appear to take any evasive action. After we landed at gri an employee at the FBO where we refueled told me that the pilot of the cessna with which we had the encounter had just called the FBO from his aircraft by telephone and said 'ask the citation crew if they ever saw me' or something to that effect. It's interesting that a pilot would be communicating by telephone from his aircraft when he should have been monitoring the CTAF while operating on or near the airport for other traffic and issuing his own position reporting as per aim chapter 4, 4-9. It may have prevented this incident. Also my first officer and I will need to maintain a higher level of vigilance, especially when descending into an uncontrolled field at dusk after a long high altitude flight. I wish I had more information on the other aircraft but I still don't know if he took off from gri or where he was going.

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Original NASA ASRS Text

Title: CITATION S550 ACFT ON APCH TO UNCTLED ARPT AT DUSK BROADCAST THEIR POS SEVERAL TIMES ENTERING THE PATTERN WITH NO COM FROM ANY OTHER ACFT. 4 MI FROM ARPT RPTR FLC SAW INTRUDER ACFT COMING IN OPPOSITE DIRECTION AND HAD TO PITCH OVER TO AVOID THE ACFT WHICH APPARENTLY MADE NO EVASIVE ATTEMPT. NMAC.

Narrative: THE FOLLOWING INCIDENT OCCURRED DURING A FLT FROM OAK TO GRI. SHORTLY AFTER BEING CLRED FOR A VISUAL APCH TO GRI BY ZMP, I CANCELED MY IFR FLT PLAN AND BEGAN MANEUVERING TO ENTER THE TFC PATTERN AT GRI. MY FO BROADCAST OUR POS AND INTENTIONS ON THE CTAF FREQ SEVERAL TIMES DURING OUR APCH TO THE ARPT BEGINNING AT ABOUT 9 MI NW OF THE ARPT. THE ARPT CTL TWR HAD CLOSED FOR THE EVENING. DURING THIS TIME WE HEARD NO OTHER ACFT ON CTAF RESPOND OR RPT POS. AT ABOUT 4 MI NW OF GRI A SINGLE ENG CESSNA (A 152 OR 172 I THINK) APPEARED AT OUR 11 O'CLOCK POS COMING TOWARD US FROM THE OPPOSITE DIRECTION. IT WAS SLIGHTLY ABOVE OUR ALT. I PITCHED DOWN TO INCREASE THE VERT SEPARATION BTWN US. THE CESSNA THEN PASSED OVER US AND DID NOT APPEAR TO TAKE ANY EVASIVE ACTION. AFTER WE LANDED AT GRI AN EMPLOYEE AT THE FBO WHERE WE REFUELED TOLD ME THAT THE PLT OF THE CESSNA WITH WHICH WE HAD THE ENCOUNTER HAD JUST CALLED THE FBO FROM HIS ACFT BY TELEPHONE AND SAID 'ASK THE CITATION CREW IF THEY EVER SAW ME' OR SOMETHING TO THAT EFFECT. IT'S INTERESTING THAT A PLT WOULD BE COMMUNICATING BY TELEPHONE FROM HIS ACFT WHEN HE SHOULD HAVE BEEN MONITORING THE CTAF WHILE OPERATING ON OR NEAR THE ARPT FOR OTHER TFC AND ISSUING HIS OWN POS RPTING AS PER AIM CHAPTER 4, 4-9. IT MAY HAVE PREVENTED THIS INCIDENT. ALSO MY FO AND I WILL NEED TO MAINTAIN A HIGHER LEVEL OF VIGILANCE, ESPECIALLY WHEN DSNDING INTO AN UNCTLED FIELD AT DUSK AFTER A LONG HIGH ALT FLT. I WISH I HAD MORE INFO ON THE OTHER ACFT BUT I STILL DON'T KNOW IF HE TOOK OFF FROM GRI OR WHERE HE WAS GOING.

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.