DC8 freighter has near midair collision with unknown type aircraft at FL280. DC8 had reversed course account WX ahead and climbed to FL280 from FL270 in accord with ATC clearance. An apparent problem of coordination between mkjk and muha ARTCC.

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Attributes
ACN	370783
Time
Date	199706
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : usr
State Reference	FO
Altitude	msl bound lower : 28000 msl bound upper : 28000
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : mkjk
Operator	common carrier : air carrier
Make Model Name	DC-8 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	cruise other
Route In Use	enroute : direct enroute airway : ua301 enroute other
Flight Plan	IFR
Aircraft 2
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	other : unknown
Flight Phase	cruise other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : instrument pilot : commercial
Experience	flight time last 90 days : 100 flight time total : 5200 flight time type : 2600
ASRS Report	370783
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	aircraft equipment problem : less severe conflict : nmac inflight encounter : weather other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : insufficient time
Consequence	Other
Miss Distance	horizontal : 600 vertical : 100
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error other
Situations
ATC Facility	procedure or policy : unspecified

Narrative:

Were on UA301 heading south towards kingston. Due to WX we had to turn around back to mia at FL270. While coordinating an altitude change to FL260 or FL280 with both havana and kingston center, we were cleared to FL280, direct to usr. When completing the turn back north, first officer noticed another airplane fly by our airplane. Type of other aircraft unknown. Right now, there is no regulation requiring part 121 cargo aircraft to have TCASII. TCASII would have definitely helped us see this aircraft in the clouds.

Original NASA ASRS Text

Title: DC8 FREIGHTER HAS NMAC WITH UNKNOWN TYPE ACFT AT FL280. DC8 HAD REVERSED COURSE ACCOUNT WX AHEAD AND CLBED TO FL280 FROM FL270 IN ACCORD WITH ATC CLRNC. AN APPARENT PROB OF COORD BTWN MKJK AND MUHA ARTCC.

Narrative: WERE ON UA301 HEADING S TOWARDS KINGSTON. DUE TO WX WE HAD TO TURN AROUND BACK TO MIA AT FL270. WHILE COORDINATING AN ALT CHANGE TO FL260 OR FL280 WITH BOTH HAVANA AND KINGSTON CTR, WE WERE CLRED TO FL280, DIRECT TO USR. WHEN COMPLETING THE TURN BACK N, FO NOTICED ANOTHER AIRPLANE FLY BY OUR AIRPLANE. TYPE OF OTHER ACFT UNKNOWN. RIGHT NOW, THERE IS NO REG REQUIRING PART 121 CARGO ACFT TO HAVE TCASII. TCASII WOULD HAVE DEFINITELY HELPED US SEE THIS ACFT IN THE CLOUDS.

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.