A B767's VOR and FMC failed after takeoff on an international flight. An emergency was declared. Air...

Attributes
ACN	797768
Time
Date	200807
Place
Locale Reference	airport : zzzz.airport
State Reference	FO
Altitude	msl single value : 3000
Aircraft 1
Controlling Facilities	tower : zzzz.tower
Operator	common carrier : air carrier
Make Model Name	B767-300 and 300 ER
Operating Under FAR Part	Part 121
Flight Phase	climbout : initial
Route In Use	departure sid : n/s
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
ASRS Report	797768
Person 2
Affiliation	company : air carrier
Function	flight crew : captain
ASRS Report	797769
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	aircraft equipment other aircraft equipment : vor/ fmc other flight crewa
Resolutory Action	flight crew : diverted to another airport flight crew : declared emergency other
Consequence	other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

During the departure; the captain lost his VOR; and then subsequently lost the left FMC. We completed the departure by referring to my side which was working fine. I was given control of the aircraft and communications with ATC. The captain and relief pilot completed the QRH procedures and troubleshot the problem with operations and dispatch. The decision was made to return to ZZZ2. We declared an emergency and requested the crash fire rescue equipment equipment to stand by. We descended to burn off some fuel and made an overweight landing with a very smooth touchdown. The fire trucks followed us to the gate and noted that they did not see anything abnormal. While parked on the hard stand; the fire department took the tire temperatures which were around 260 degrees. Maintenance came and replaced the FMC; did an overweight inspection and ETOPS check and completed all paperwork. We were redispatched; fueled and catered and departed. Supplemental information from acn 797769: discussed problem with ZZZ2 maintenance and dispatch. Determined aircraft not suitable for overwater flight and returned to ZZZ2 burning down fuel weight.

Original NASA ASRS Text

Title: A B767'S VOR AND FMC FAILED AFTER TKOF ON AN INTL FLT. AN EMER WAS DECLARED. ACFT RETURNED TO DEP ARPT BECAUSE IT WAS NOT SUITABLE FOR OCEANIC FLT.

Narrative: DURING THE DEP; THE CAPT LOST HIS VOR; AND THEN SUBSEQUENTLY LOST THE L FMC. WE COMPLETED THE DEP BY REFERRING TO MY SIDE WHICH WAS WORKING FINE. I WAS GIVEN CTL OF THE ACFT AND COMS WITH ATC. THE CAPT AND RELIEF PLT COMPLETED THE QRH PROCS AND TROUBLESHOT THE PROB WITH OPS AND DISPATCH. THE DECISION WAS MADE TO RETURN TO ZZZ2. WE DECLARED AN EMER AND REQUESTED THE CFR EQUIP TO STAND BY. WE DSNDED TO BURN OFF SOME FUEL AND MADE AN OVERWT LNDG WITH A VERY SMOOTH TOUCHDOWN. THE FIRE TRUCKS FOLLOWED US TO THE GATE AND NOTED THAT THEY DID NOT SEE ANYTHING ABNORMAL. WHILE PARKED ON THE HARD STAND; THE FIRE DEPT TOOK THE TIRE TEMPS WHICH WERE AROUND 260 DEGS. MAINT CAME AND REPLACED THE FMC; DID AN OVERWT INSPECTION AND ETOPS CHK AND COMPLETED ALL PAPERWORK. WE WERE REDISPATCHED; FUELED AND CATERED AND DEPARTED. SUPPLEMENTAL INFO FROM ACN 797769: DISCUSSED PROB WITH ZZZ2 MAINT AND DISPATCH. DETERMINED ACFT NOT SUITABLE FOR OVERWATER FLT AND RETURNED TO ZZZ2 BURNING DOWN FUEL WT.

Data retrieved from NASA's ASRS site as of May 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.

A B767's VOR and FMC failed after takeoff on an international flight. An emergency was declared. Aircraft returned to departure airport because it was not suitable for oceanic flight.