First officer of a B727-200 cargo drifted off STAR track during arrival due to amended instructions by ATC to turn at a subsequent DME limit for vectors to final. ATC noticed the error and called the crew's attention to it whereupon the first officer immediately corrected back.

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Attributes
ACN	414836
Time
Date	199809
Day	Tue
Local Time Of Day	0001 To 0600
Place
Locale Reference	airport : mem
State Reference	TN
Altitude	msl bound lower : 5000 msl bound upper : 5000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : mem tower : lga
Operator	common carrier : air carrier
Make Model Name	B727-200
Operating Under FAR Part	Part 121
Flight Phase	descent : approach
Route In Use	arrival other arrival star : star enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : second officer
Qualification	pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 0 flight time total : 6500
ASRS Report	414836
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 55 flight time total : 5600 flight time type : 3600
ASRS Report	414830
Events
Anomaly	non adherence : published procedure non adherence : clearance other spatial deviation
Independent Detector	other controllera
Resolutory Action	flight crew : returned to intended course or assigned course other
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

First officer flying assigned course on a memphis gilmore arrival and captain and so outside looking for traffic. Approach control advised pending vector for runway change. First officer inadvertently drifted 1 DOT off course before being called by ATC approach control. Correction was immediate. Supplemental information from acn 414830: we were inbound on the 308 degree radial at 25 mi when controller gave us instructions and change of runway. We were directed to turn left at 11 DME for a heading of 090 degrees.

Original NASA ASRS Text

Title: FO OF A B727-200 CARGO DRIFTED OFF STAR TRACK DURING ARR DUE TO AMENDED INSTRUCTIONS BY ATC TO TURN AT A SUBSEQUENT DME LIMIT FOR VECTORS TO FINAL. ATC NOTICED THE ERROR AND CALLED THE CREW'S ATTN TO IT WHEREUPON THE FO IMMEDIATELY CORRECTED BACK.

Narrative: FO FLYING ASSIGNED COURSE ON A MEMPHIS GILMORE ARR AND CAPT AND SO OUTSIDE LOOKING FOR TFC. APCH CTL ADVISED PENDING VECTOR FOR RWY CHANGE. FO INADVERTENTLY DRIFTED 1 DOT OFF COURSE BEFORE BEING CALLED BY ATC APCH CTL. CORRECTION WAS IMMEDIATE. SUPPLEMENTAL INFO FROM ACN 414830: WE WERE INBOUND ON THE 308 DEG RADIAL AT 25 MI WHEN CTLR GAVE US INSTRUCTIONS AND CHANGE OF RWY. WE WERE DIRECTED TO TURN L AT 11 DME FOR A HDG OF 090 DEGS.

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.