<< >> NASA ASRS Report 379970, September 1997

An air carrier B767 flight crew reports an encounter with an air carrier DC10 100 NM east of chs. They both saw the other aircraft and acquired it on their TCASII and they stopped their climb at FL375 to avoid, but the controller said that it was well clear at FL410.

Attributes
ACN	379970
Time
Date	199709
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : chs
State Reference	SC
Altitude	msl bound lower : 37500 msl bound upper : 39000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zjx
Operator	common carrier : air carrier
Make Model Name	B767-300 and 300 ER
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	climbout : intermediate altitude cruise other
Route In Use	enroute : atlantic enroute : other oceanic
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	DC-10 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	Other
Flight Phase	cruise other
Route In Use	enroute : atlantic enroute : other oceanic
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 8000 flight time type : 4000
ASRS Report	379970
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	altitude deviation : undershoot conflict : airborne less severe other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : took evasive action other
Consequence	Other
Miss Distance	horizontal : 12000 vertical : 1500
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	other

Narrative:

On climb from FL350 to FL390 converging traffic was spotted visually and on TCASII at FL390. We stopped climb at FL375 and descended while calling ZJX who had us in radar contact. They said the other aircraft was at FL410 not FL390. We waited until clear and continued our climb. The aircraft did appear to be at FL390 however, and our TCASII equipment was working normally. This occurred 100 mi from chs on a flight from txkf.

Related reports:

• ZBW controller was advised of a significant wake turbulence ...
• C172XP aircraft in climb had encounter with B737. Both aircr...
• B757-200 captain failed to turn per cleared taxi route durin...
• Wake vortex encounter and loss of aircraft control in a PA31...

	Enter your search terms Submit search form
	Web www.37000feet.com

Original NASA ASRS Text

Title: AN ACR B767 FLC RPTS AN ENCOUNTER WITH AN ACR DC10 100 NM E OF CHS. THEY BOTH SAW THE OTHER ACFT AND ACQUIRED IT ON THEIR TCASII AND THEY STOPPED THEIR CLB AT FL375 TO AVOID, BUT THE CTLR SAID THAT IT WAS WELL CLR AT FL410.

Narrative: ON CLB FROM FL350 TO FL390 CONVERGING TFC WAS SPOTTED VISUALLY AND ON TCASII AT FL390. WE STOPPED CLB AT FL375 AND DSNDED WHILE CALLING ZJX WHO HAD US IN RADAR CONTACT. THEY SAID THE OTHER ACFT WAS AT FL410 NOT FL390. WE WAITED UNTIL CLR AND CONTINUED OUR CLB. THE ACFT DID APPEAR TO BE AT FL390 HOWEVER, AND OUR TCASII EQUIP WAS WORKING NORMALLY. THIS OCCURRED 100 MI FROM CHS ON A FLT FROM TXKF.

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.