A HS125-800 had near midair collision at fnl after announcing unacknowledged landing intentions on C...

Attributes
ACN	800530
Time
Date	200808
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : fnl.airport
State Reference	CO
Altitude	agl single value : 600
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air taxi
Make Model Name	BAe 125 Series 800
Operating Under FAR Part	Part 135
Flight Phase	descent : approach
Route In Use	approach : visual
Flight Plan	IFR IFR
Aircraft 2
Operator	general aviation : personal
Make Model Name	Small Aircraft
Operating Under FAR Part	Part 91
Flight Phase	descent : approach
Route In Use	approach : traffic pattern
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 97 flight time total : 19300 flight time type : 769
ASRS Report	800530
Events
Anomaly	conflict : nmac non adherence : published procedure
Independent Detector	other flight crewa
Resolutory Action	flight crew : executed go around flight crew : took evasive action
Miss Distance	horizontal : 200 vertical : 200
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

We were flying a visual approach to runway 33 at fnl; established on final and using the ILS for guidance. We had made 2 or 3 calls on unicom while on final advising traffic of our pros and intention to land. Earlier on final; we heard a plane call 'base;' but did not see him. Quite awhile later (2 or 3 mins) the same plane was turning final and descending on top of us in our 11:30 O'clock position. We initiated a right turn and missed approach with no further incident.

Original NASA ASRS Text

Title: A HS125-800 HAD NMAC AT FNL AFTER ANNOUNCING UNACKNOWLEDGED LNDG INTENTIONS ON CTAF.

Narrative: WE WERE FLYING A VISUAL APCH TO RWY 33 AT FNL; ESTABLISHED ON FINAL AND USING THE ILS FOR GUIDANCE. WE HAD MADE 2 OR 3 CALLS ON UNICOM WHILE ON FINAL ADVISING TFC OF OUR PROS AND INTENTION TO LAND. EARLIER ON FINAL; WE HEARD A PLANE CALL 'BASE;' BUT DID NOT SEE HIM. QUITE AWHILE LATER (2 OR 3 MINS) THE SAME PLANE WAS TURNING FINAL AND DSNDING ON TOP OF US IN OUR 11:30 O'CLOCK POS. WE INITIATED A R TURN AND MISSED APCH WITH NO FURTHER INCIDENT.

Data retrieved from NASA's ASRS site as of May 2009 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.

A HS125-800 had near midair collision at fnl after announcing unacknowledged landing intentions on CTAF.