Near midair collision between a B727 level at FL310 and a C441 descending in the opposite direction ...

Attributes
ACN	512629
Time
Date	200105
Day	Sat
Place
Locale Reference	navaid : cro.vor
State Reference	FO
Altitude	msl single value : 31000
Environment
Flight Conditions	VMC
Aircraft 1
Controlling Facilities	artcc : mdsd.artcc tracon : c90.tracon
Operator	common carrier : air carrier
Make Model Name	B727 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	cruise : level
Flight Plan	IFR
Aircraft 2
Controlling Facilities	artcc : mdsd.artcc
Make Model Name	Cessna Twin Turboprop Undifferentiated or Other Model
Operating Under FAR Part	Part 91
Flight Phase	cruise : enroute altitude change
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	512629
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	conflict : nmac non adherence : published procedure
Independent Detector	aircraft equipment : tcas other flight crewa other flight crewb
Miss Distance	horizontal : 50 vertical : 300
Supplementary
Problem Areas	ATC Human Performance Flight Crew Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

At XB56Z over cro, FL310, northbound to mia, as filed, in the clear, IFR flight plan, altimeter 29.92, level, responded to a RA to avoid a descending aircraft, type C441, registered XXX flying sbound. 1 min before, santo domingo ATC instructed us to turn 90 degrees to the left, no ICAO language stating 'immediately' was issued in the instruction from ATC. The conflicting traffic passed within 300 ft vertically slightly to the right and converging. We executed a 2000 FPM climb following the TCASII advisory. No injuries were reported.

Original NASA ASRS Text

Title: NMAC BTWN A B727 LEVEL AT FL310 AND A C441 DSNDING IN THE OPPOSITE DIRECTION THROUGH THEIR ALT.

Narrative: AT XB56Z OVER CRO, FL310, NBOUND TO MIA, AS FILED, IN THE CLR, IFR FLT PLAN, ALTIMETER 29.92, LEVEL, RESPONDED TO A RA TO AVOID A DSNDING ACFT, TYPE C441, REGISTERED XXX FLYING SBOUND. 1 MIN BEFORE, SANTO DOMINGO ATC INSTRUCTED US TO TURN 90 DEGS TO THE L, NO ICAO LANGUAGE STATING 'IMMEDIATELY' WAS ISSUED IN THE INSTRUCTION FROM ATC. THE CONFLICTING TFC PASSED WITHIN 300 FT VERTLY SLIGHTLY TO THE R AND CONVERGING. WE EXECUTED A 2000 FPM CLB FOLLOWING THE TCASII ADVISORY. NO INJURIES WERE RPTED.

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.

Near midair collision between a B727 level at FL310 and a C441 descending in the opposite direction through their altitude.