Air carrier X heading deviation had less than standard separation from aircraft Y. System error.

Attributes
ACN	299705
Time
Date	199503
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : hvq
State Reference	WV
Altitude	msl bound lower : 35000 msl bound upper : 35000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	artcc : zid
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Navigation In Use	Other
Flight Phase	cruise other
Route In Use	enroute : on vectors
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	other : unknown
Flight Phase	cruise other
Route In Use	enroute : direct
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : cfi pilot : atp
Experience	flight time last 90 days : 225 flight time total : 8500 flight time type : 2000
ASRS Report	299705
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : flight engineer pilot : cfi pilot : atp
Experience	flight time last 90 days : 198 flight time total : 12685 flight time type : 3252
ASRS Report	299106
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation non adherence : clearance non adherence : published procedure
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	none taken : anomaly accepted
Consequence	Other
Miss Distance	horizontal : 27000 vertical : 0
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Pilot Deviation Operational Error

Narrative:

Air carrier X assigned heading with autoplt on. PF overshot heading. PNF caught error and requested heading from center. Center said present heading ok. Observed opposite direction aircraft Y on TCASII. Eventually TCASII RA. (We had visual on traffic prior RA.) no evasive action required.

Original NASA ASRS Text

Title: ACR X HDG DEV HAD LTSS FROM ACFT Y. SYS ERROR.

Narrative: ACR X ASSIGNED HDG WITH AUTOPLT ON. PF OVERSHOT HDG. PNF CAUGHT ERROR AND REQUESTED HDG FROM CTR. CTR SAID PRESENT HDG OK. OBSERVED OPPOSITE DIRECTION ACFT Y ON TCASII. EVENTUALLY TCASII RA. (WE HAD VISUAL ON TFC PRIOR RA.) NO EVASIVE ACTION REQUIRED.

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.