A B767-300 flight crew departing on a transatlantic flight experienced problems with both ADI's. After consulting maintenance; they returned to departure station and landed overweight.

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Attributes
ACN	702076
Time
Date	200607
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : iad.airport
State Reference	VA
Altitude	msl single value : 18000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zdc.artcc
Operator	common carrier : air carrier
Make Model Name	B767-300 and 300 ER
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	climbout : vacating altitude
Route In Use	departure sid : n/s
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Experience	flight time last 90 days : 210 flight time total : 16000 flight time type : 6000
ASRS Report	702076
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	aircraft equipment problem : less severe
Independent Detector	other flight crewa
Resolutory Action	flight crew : landed as precaution other
Consequence	other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

Captain's ADI and first officer's ADI lost color capability during climb out. Continued to cruise and switched to alternate symbol generator. Both ADI's continued to have problems. Worked with maintenance and notified dispatch and both unable to help solve problem. During troubleshooting the 'confign' warning on EICAS came on along with a radar altimeter fail message. Decided after exhausting all possibilities to remedy situation to return to iad instead of crossing the north atlantic at night. After coordination with dispatch; an overweight landing was deemed acceptable instead of dumping fuel. We then returned to dulles and performed a smooth landing and taxied to the gate and delivered the aircraft to maintenance.

Original NASA ASRS Text

Title: A B767-300 FLT CREW DEPARTING ON A TRANSATLANTIC FLT EXPERIENCED PROBS WITH BOTH ADI'S. AFTER CONSULTING MAINT; THEY RETURNED TO DEP STATION AND LANDED OVERWT.

Narrative: CAPT'S ADI AND FO'S ADI LOST COLOR CAPABILITY DURING CLBOUT. CONTINUED TO CRUISE AND SWITCHED TO ALTERNATE SYMBOL GENERATOR. BOTH ADI'S CONTINUED TO HAVE PROBS. WORKED WITH MAINT AND NOTIFIED DISPATCH AND BOTH UNABLE TO HELP SOLVE PROB. DURING TROUBLESHOOTING THE 'CONFIGN' WARNING ON EICAS CAME ON ALONG WITH A RADAR ALTIMETER FAIL MESSAGE. DECIDED AFTER EXHAUSTING ALL POSSIBILITIES TO REMEDY SIT TO RETURN TO IAD INSTEAD OF XING THE NORTH ATLANTIC AT NIGHT. AFTER COORD WITH DISPATCH; AN OVERWT LNDG WAS DEEMED ACCEPTABLE INSTEAD OF DUMPING FUEL. WE THEN RETURNED TO DULLES AND PERFORMED A SMOOTH LNDG AND TAXIED TO THE GATE AND DELIVERED THE ACFT TO MAINT.

Data retrieved from NASA's ASRS site as of January 2009 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.