Track deviation. - NASA ASRS

Attributes
ACN	318539
Time
Date	199509
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : flw
State Reference	CA
Altitude	msl bound lower : 33000 msl bound upper : 33000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zla
Operator	common carrier : air carrier
Make Model Name	B737-500
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	cruise other
Route In Use	arrival other arrival star : star enroute other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 220 flight time total : 4800 flight time type : 220
ASRS Report	318539
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 250 flight time total : 10000 flight time type : 3500
ASRS Report	315799
Events
Anomaly	aircraft equipment problem : less severe non adherence : published procedure non adherence : clearance
Independent Detector	other controllera
Resolutory Action	flight crew : overcame equipment problem flight crew : returned to intended course or assigned course other
Consequence	faa : reviewed incident with flight crew
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	Pilot Deviation

Narrative:

We were cleared the tandy 2 arrival, fellows transition to orange county. We were heading about 100 degrees (the transition is flw 123 degree radial) and about 8 DME. My CDI was centered on 123 degrees and showing a 'from.' the captain was on fillmore 148 degrees (the next course). ZLA told us to come 20 degrees right, then 40 degrees right to rejoin. We immediately selected 'first officer on auxiliary' for my CDI and the captain selected flw 123 degree radial as we turned back to course. While on 'first officer on auxiliary,' the CDI centered along with the captain's CDI. We wrote up the VOR #2 and it was entered in the logbook and dmi per MEL. We contacted ZLA supervisor and he advised us there was no conflict but they were just giving us an advised heading for our navigation. Supplemental information from acn 315799: #2 had failed with no flags in view.

Original NASA ASRS Text

Title: TRACK DEV.

Narrative: WE WERE CLRED THE TANDY 2 ARR, FELLOWS TRANSITION TO ORANGE COUNTY. WE WERE HDG ABOUT 100 DEGS (THE TRANSITION IS FLW 123 DEG RADIAL) AND ABOUT 8 DME. MY CDI WAS CTRED ON 123 DEGS AND SHOWING A 'FROM.' THE CAPT WAS ON FILLMORE 148 DEGS (THE NEXT COURSE). ZLA TOLD US TO COME 20 DEGS R, THEN 40 DEGS R TO REJOIN. WE IMMEDIATELY SELECTED 'FO ON AUX' FOR MY CDI AND THE CAPT SELECTED FLW 123 DEG RADIAL AS WE TURNED BACK TO COURSE. WHILE ON 'FO ON AUX,' THE CDI CTRED ALONG WITH THE CAPT'S CDI. WE WROTE UP THE VOR #2 AND IT WAS ENTERED IN THE LOGBOOK AND DMI PER MEL. WE CONTACTED ZLA SUPVR AND HE ADVISED US THERE WAS NO CONFLICT BUT THEY WERE JUST GIVING US AN ADVISED HDG FOR OUR NAV. SUPPLEMENTAL INFO FROM ACN 315799: #2 HAD FAILED WITH NO FLAGS IN VIEW.

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.