Diversion to cyyr mandated for the flight crew of a B777 when they lose both overheat and fire detection circuits on the left engine while on frequency with czqx, nf.

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Attributes
ACN	609926
Time
Date	200401
Day	Wed
Place
Locale Reference	atc facility : czqx.artcc
State Reference	NF
Aircraft 1
Controlling Facilities	artcc : czqx.artcc
Operator	common carrier : air carrier
Make Model Name	B777 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	cruise : level
Route In Use	enroute : atlantic
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
ASRS Report	609926
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : system warning other flight crewa other flight crewb
Resolutory Action	controller : issued new clearance flight crew : diverted to another airport
Consequence	other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

Gander center. Just prior to 50W, both overheat detection circuits on the left engine and both fire detection loops on the left engine failed at the same time. Diverted to and landed at yyr.

Original NASA ASRS Text

Title: DIVERSION TO CYYR MANDATED FOR THE FLT CREW OF A B777 WHEN THEY LOSE BOTH OVERHEAT AND FIRE DETECTION CIRCUITS ON THE L ENG WHILE ON FREQ WITH CZQX, NF.

Narrative: GANDER CTR. JUST PRIOR TO 50W, BOTH OVERHEAT DETECTION CIRCUITS ON THE L ENG AND BOTH FIRE DETECTION LOOPS ON THE L ENG FAILED AT THE SAME TIME. DIVERTED TO AND LANDED AT YYR.

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.