A DC8 freighter turns off course intercepting an airway. The radar controller gives the crew an advi...

Attributes
ACN	438396
Time
Date	199905
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	navaid : bdf.vortac
State Reference	IL
Altitude	msl single value : 33000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zau.artcc
Operator	common carrier : air carrier
Make Model Name	DC-8 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	other vortac
Flight Phase	cruise : level
Route In Use	enroute airway : ns.airway
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : instrument pilot : multi engine pilot : commercial
Experience	flight time last 90 days : 150 flight time total : 4200 flight time type : 1600
ASRS Report	438396
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : multi engine pilot : commercial
Events
Anomaly	aircraft equipment problem : less severe maintenance problem : improper maintenance non adherence : clearance other spatial deviation
Independent Detector	other controllera
Resolutory Action	controller : issued advisory flight crew : diverted to another airport flight crew : landed as precaution
Consequence	other other
Supplementary
Problem Areas	Maintenance Human Performance Flight Crew Human Performance Aircraft
Primary Problem	Maintenance Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

While flying en route from dfw to ord, ATC gave us a heading to intercept the airway. When #1 and #2 VOR CDI indicators centered, the aircraft was turned on course. At that time, ATC asked where we were going and told us we were off course by 15 mi east of the airway. Also at that time there was a 20 degree split between the captain's directional gyro and the first officer's directional gyro. At that time it was determined that both vors were unreliable. ATC was told of the problem and we diverted to ind, where the aircraft could be worked on. It was determined later by avionics that the wires on the flux valve were corroded and there was brass metallic screws instead of non metallic.

Original NASA ASRS Text

Title: A DC8 FREIGHTER TURNS OFF COURSE INTERCEPTING AN AIRWAY. THE RADAR CTLR GIVES THE CREW AN ADVISORY.

Narrative: WHILE FLYING ENRTE FROM DFW TO ORD, ATC GAVE US A HDG TO INTERCEPT THE AIRWAY. WHEN #1 AND #2 VOR CDI INDICATORS CTRED, THE ACFT WAS TURNED ON COURSE. AT THAT TIME, ATC ASKED WHERE WE WERE GOING AND TOLD US WE WERE OFF COURSE BY 15 MI E OF THE AIRWAY. ALSO AT THAT TIME THERE WAS A 20 DEG SPLIT BTWN THE CAPT'S DIRECTIONAL GYRO AND THE FO'S DIRECTIONAL GYRO. AT THAT TIME IT WAS DETERMINED THAT BOTH VORS WERE UNRELIABLE. ATC WAS TOLD OF THE PROB AND WE DIVERTED TO IND, WHERE THE ACFT COULD BE WORKED ON. IT WAS DETERMINED LATER BY AVIONICS THAT THE WIRES ON THE FLUX VALVE WERE CORRODED AND THERE WAS BRASS METALLIC SCREWS INSTEAD OF NON METALLIC.

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.

A DC8 freighter turns off course intercepting an airway. The radar controller gives the crew an advisory.