Flight crew of MD88 has critical encounter with military twin turboprop over proud intersection near new york. Received TCASII TA and RA. ATC advised the conflicting aircraft 'popped up' just before the RA.

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Attributes
ACN	584775
Time
Date	200306
Day	Tue
Local Time Of Day	1801 To 2400
Place
Locale Reference	intersection : proud
State Reference	NY
Altitude	msl single value : 8500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zny.artcc
Operator	common carrier : air carrier
Make Model Name	MD-88
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	descent : intermediate altitude
Flight Plan	IFR
Aircraft 2
Operator	other
Make Model Name	Military
Operating Under FAR Part	Part 91
Flight Phase	climbout : vacating altitude
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 7800 flight time type : 4000
ASRS Report	584775
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 200 flight time total : 21000 flight time type : 2800
ASRS Report	584774
Events
Anomaly	conflict : airborne critical
Independent Detector	aircraft equipment : tcas
Resolutory Action	flight crew : took evasive action
Miss Distance	horizontal : 1320 vertical : 400
Supplementary
Problem Areas	Airspace Structure Environmental Factor Flight Crew Human Performance
Primary Problem	Airspace Structure

Narrative:

Assigned heading 040 degrees, descent to 4000 ft. Passing 9000 ft, received TA of climbing aircraft approximately 500 ft below and climbing. Began to level at 8500 ft when RA directed descent greater than 2000 FPM. Passed within 1/4 mi and 400 ft below twin turboprop with military colors. ATC advised at this time, traffic at 12 O'clock position, 1/2 mi climbing 'just popped up!' we informed ATC of TA and RA action taken.

Original NASA ASRS Text

Title: FLT CREW OF MD88 HAS CRITICAL ENCOUNTER WITH MIL TWIN TURBOPROP OVER PROUD INTXN NEAR NEW YORK. RECEIVED TCASII TA AND RA. ATC ADVISED THE CONFLICTING ACFT 'POPPED UP' JUST BEFORE THE RA.

Narrative: ASSIGNED HDG 040 DEGS, DSCNT TO 4000 FT. PASSING 9000 FT, RECEIVED TA OF CLBING ACFT APPROX 500 FT BELOW AND CLBING. BEGAN TO LEVEL AT 8500 FT WHEN RA DIRECTED DSCNT GREATER THAN 2000 FPM. PASSED WITHIN 1/4 MI AND 400 FT BELOW TWIN TURBOPROP WITH MIL COLORS. ATC ADVISED AT THIS TIME, TFC AT 12 O'CLOCK POS, 1/2 MI CLBING 'JUST POPPED UP!' WE INFORMED ATC OF TA AND RA ACTION TAKEN.

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.