B767 early turn on departure SID from ory.

Attributes
ACN	447530
Time
Date	199908
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : lfff.airport
State Reference	FO
Altitude	msl single value : 2000
Environment
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : lfff.tracon
Operator	common carrier : air carrier
Make Model Name	B767 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	climbout : initial
Route In Use	departure sid : lgl 7x
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain
Qualification	pilot : atp
ASRS Report	447530
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : multi engine pilot : commercial
Events
Anomaly	inflight encounter other non adherence : far non adherence : clearance non adherence : published procedure other spatial deviation
Independent Detector	aircraft equipment other aircraft equipment : 927 other controllera other flight crewa
Resolutory Action	controller : provided flight assist flight crew : became reoriented none taken : detected after the fact
Supplementary
Problem Areas	Flight Crew Human Performance Environmental Factor Aircraft
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

We were assigned ory runway 8 lgl 7X departure. Due to confusion between conflicting LNAV and raw data, we turned before 6.5 DME. When we took the runway, a map shift was noted. We therefore used raw data. We thought the map shift would correct itself when the unit updated once airborne. At 2.5 DME, the first officer began a turn to the right to intercept the 069 degree radial from the ol VOR. A flag appeared on the VOR about that time. We later determined it was for the clm VOR later on the departure. Believing we had both a bad map depiction and a bad VOR, we began a turn further right to intercept the clm 249 degree radial outbound. The turn was early. We determined that the clm VOR was out and asked for a vector and reported the bad VOR. We had unreliable raw data and a map shirt. It was hard to know what to believe. We asked ATC for vectors and they gave them till the map shift was updated and we continued with no further problems on the departure. ATC did note the early turn.

Original NASA ASRS Text

Title: B767 EARLY TURN ON DEP SID FROM ORY.

Narrative: WE WERE ASSIGNED ORY RWY 8 LGL 7X DEP. DUE TO CONFUSION BTWN CONFLICTING LNAV AND RAW DATA, WE TURNED BEFORE 6.5 DME. WHEN WE TOOK THE RWY, A MAP SHIFT WAS NOTED. WE THEREFORE USED RAW DATA. WE THOUGHT THE MAP SHIFT WOULD CORRECT ITSELF WHEN THE UNIT UPDATED ONCE AIRBORNE. AT 2.5 DME, THE FO BEGAN A TURN TO THE R TO INTERCEPT THE 069 DEG RADIAL FROM THE OL VOR. A FLAG APPEARED ON THE VOR ABOUT THAT TIME. WE LATER DETERMINED IT WAS FOR THE CLM VOR LATER ON THE DEP. BELIEVING WE HAD BOTH A BAD MAP DEPICTION AND A BAD VOR, WE BEGAN A TURN FURTHER R TO INTERCEPT THE CLM 249 DEG RADIAL OUTBOUND. THE TURN WAS EARLY. WE DETERMINED THAT THE CLM VOR WAS OUT AND ASKED FOR A VECTOR AND RPTED THE BAD VOR. WE HAD UNRELIABLE RAW DATA AND A MAP SHIRT. IT WAS HARD TO KNOW WHAT TO BELIEVE. WE ASKED ATC FOR VECTORS AND THEY GAVE THEM TILL THE MAP SHIFT WAS UPDATED AND WE CONTINUED WITH NO FURTHER PROBS ON THE DEP. ATC DID NOTE THE EARLY TURN.

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.