Close proximity 2 air carrier widebody transport's southwest of taipei.

Attributes
ACN	155761
Time
Date	199009
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : mkg
State Reference	FO
Altitude	msl bound lower : 29000 msl bound upper : 29000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : rctp
Operator	common carrier : air carrier
Make Model Name	Widebody, Low Wing, 4 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	cruise other
Route In Use	enroute airway : ai
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Widebody, Low Wing, 3 Turbojet Eng
Navigation In Use	Other
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : flight engineer pilot : atp pilot : cfi
Experience	flight time last 90 days : 95 flight time total : 23000 flight time type : 300
ASRS Report	155761
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation
Independent Detector	other flight crewa
Resolutory Action	none taken : insufficient time
Consequence	Other
Miss Distance	horizontal : 6000 vertical : 0
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Hkg-sro passing 10 NM northwest mkg heading 050 degrees. Approximately 10 NM west of track due C/B avoidance, an air carrier Y widebody transport was observed at our 1 O'clock position banking left opp direction FL290 passing off our starboard 1 NM. Our flight not advised of any traffic. Taipei was overhead requesting heading from air carrier Y and advised him of our aircraft as traffic, at which time he was observed by us. Approximately 2 mins later another opp direction air carrier Y widebody transport Z passing opp direction FL280. Widebody transport Y was heard reporting FL310 approximately 3 mins after near miss. Had both aircraft been IMC collision would have been probable. Widebody transport Y advised he was filing near miss report. Taipei advised radar showed 5 mi sep. Comments: very busy route, much charter, language potential problem.

Original NASA ASRS Text

Title: CLOSE PROX 2 ACR WDB'S SOUTHWEST OF TAIPEI.

Narrative: HKG-SRO PASSING 10 NM NW MKG HDG 050 DEGS. APPROX 10 NM W OF TRACK DUE C/B AVOIDANCE, AN ACR Y WDB WAS OBSERVED AT OUR 1 O'CLOCK POS BANKING LEFT OPP DIRECTION FL290 PASSING OFF OUR STARBOARD 1 NM. OUR FLT NOT ADVISED OF ANY TFC. TAIPEI WAS OVERHEAD REQUESTING HDG FROM ACR Y AND ADVISED HIM OF OUR ACFT AS TFC, AT WHICH TIME HE WAS OBSERVED BY US. APPROX 2 MINS LATER ANOTHER OPP DIRECTION ACR Y WDB Z PASSING OPP DIRECTION FL280. WDB Y WAS HEARD RPTING FL310 APPROX 3 MINS AFTER NEAR MISS. HAD BOTH ACFT BEEN IMC COLLISION WOULD HAVE BEEN PROBABLE. WDB Y ADVISED HE WAS FILING NEAR MISS RPT. TAIPEI ADVISED RADAR SHOWED 5 MI SEP. COMMENTS: VERY BUSY RTE, MUCH CHARTER, LANGUAGE POTENTIAL PROB.

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.