Hawker 1000 landing vny experienced near midair collision with cessna in traffic pattern.

Attributes
ACN	629135
Time
Date	200408
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : vny.airport
State Reference	NY
Altitude	msl single value : 1700
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : vny.tower
Operator	common carrier : air carrier
Make Model Name	BAe 125 Series 1000
Operating Under FAR Part	Part 91
Navigation In Use	ils localizer & glide slope : 16r other
Flight Phase	descent : approach
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tower : vny.tower
Operator	general aviation : personal
Make Model Name	Cessna Aircraft Undifferentiated or Other Model
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 : captain oversight : pic
Qualification	pilot : atp pilot : cfi
Experience	flight time last 90 days : 70 flight time total : 4276 flight time type : 780
ASRS Report	629135
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	conflict : nmac
Independent Detector	aircraft equipment : gpws aircraft equipment : tcas other flight crewa
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 300 vertical : 300
Supplementary
Problem Areas	ATC Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

We were returning empty back to home base and were cleared for the ILS runway 16R to vny. At approximately 5 mi final received RA and so we stopped descent on GS. After passing traffic, continued descent. Observed the cessna, which was on right downwind, turn base in front of us with good spacing. The airport and our cockpit was busy, so I had not heard the tower instructions to the cessna. The aircraft crossed our final, appeared to line up with the left runway, then turned back to the right, again crossing our final. By this time we had caught up with him and had to descend aggressively to avoid him. The tower at no time asked us to slow and pointed out the aircraft to us. In later conversation with the tower we learned that they were attempting to land him before us, changed their plan and returned him to his right downwind.

Original NASA ASRS Text

Title: HAWKER 1000 LNDG VNY EXPERIENCED NMAC WITH CESSNA IN TFC PATTERN.

Narrative: WE WERE RETURNING EMPTY BACK TO HOME BASE AND WERE CLRED FOR THE ILS RWY 16R TO VNY. AT APPROX 5 MI FINAL RECEIVED RA AND SO WE STOPPED DSCNT ON GS. AFTER PASSING TFC, CONTINUED DSCNT. OBSERVED THE CESSNA, WHICH WAS ON R DOWNWIND, TURN BASE IN FRONT OF US WITH GOOD SPACING. THE ARPT AND OUR COCKPIT WAS BUSY, SO I HAD NOT HEARD THE TWR INSTRUCTIONS TO THE CESSNA. THE ACFT CROSSED OUR FINAL, APPEARED TO LINE UP WITH THE L RWY, THEN TURNED BACK TO THE R, AGAIN XING OUR FINAL. BY THIS TIME WE HAD CAUGHT UP WITH HIM AND HAD TO DSND AGGRESSIVELY TO AVOID HIM. THE TWR AT NO TIME ASKED US TO SLOW AND POINTED OUT THE ACFT TO US. IN LATER CONVERSATION WITH THE TWR WE LEARNED THAT THEY WERE ATTEMPTING TO LAND HIM BEFORE US, CHANGED THEIR PLAN AND RETURNED HIM TO HIS R DOWNWIND.

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.