Flight crew of an MD80 turned early in attempting to follow clearance route due to a faulty #1 VOR equipment. ATC intervened to bring reporter back on clearance route.

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Attributes
ACN	354240
Time
Date	199611
Day	Sat
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : ihd airport : pit
State Reference	PA
Altitude	msl bound lower : 10000 msl bound upper : 10000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	MD-80 Super 80
Operating Under FAR Part	Part 121
Flight Phase	cruise other
Route In Use	enroute airway : zob
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 170 flight time total : 14300 flight time type : 170
ASRS Report	354240
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	aircraft equipment problem : less severe non adherence : clearance other anomaly other other spatial deviation
Independent Detector	other controllera
Resolutory Action	flight crew : returned to intended course or assigned course other
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	Pilot Deviation

Narrative:

Arrived at ihd VOR 10000 ft, 250 KTS. Commenced a 75 degree left turn to track out the 331 degree radial. ZOB reported we were 7+ mi northeast of VOR -- we indicated 4 mi including the 2 NM of altitude. We corrected with a center assigned heading and landed pit. No further problems. Wrote up navigation gear on #1 side. I had no off flags to indicate a problem and the VOR in the aircraft was removed and replaced in pit by company maintenance.

Original NASA ASRS Text

Title: FLC OF AN MD80 TURNED EARLY IN ATTEMPTING TO FOLLOW CLRNC RTE DUE TO A FAULTY #1 VOR EQUIP. ATC INTERVENED TO BRING RPTR BACK ON CLRNC RTE.

Narrative: ARRIVED AT IHD VOR 10000 FT, 250 KTS. COMMENCED A 75 DEG L TURN TO TRACK OUT THE 331 DEG RADIAL. ZOB RPTED WE WERE 7+ MI NE OF VOR -- WE INDICATED 4 MI INCLUDING THE 2 NM OF ALT. WE CORRECTED WITH A CTR ASSIGNED HDG AND LANDED PIT. NO FURTHER PROBS. WROTE UP NAV GEAR ON #1 SIDE. I HAD NO OFF FLAGS TO INDICATE A PROB AND THE VOR IN THE ACFT WAS REMOVED AND REPLACED IN PIT BY COMPANY MAINT.

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.