B767-300 diverts enroute due to shattered outer pane cockpit window.

Attributes
ACN	758971
Time
Date	200710
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : zzzz.artcc
State Reference	FO
Altitude	msl single value : 37000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zzzz.artcc
Operator	common carrier : air carrier
Make Model Name	B767-300 and 300 ER
Operating Under FAR Part	Part 121
Flight Phase	cruise : level
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : relief pilot
Qualification	pilot : atp pilot : commercial pilot : flight engineer
Experience	flight time last 90 days : 300 flight time total : 9800 flight time type : 3500
ASRS Report	758971
Events
Anomaly	aircraft equipment problem : less severe
Independent Detector	other flight crewa
Resolutory Action	flight crew : diverted to another airport
Consequence	other other
Supplementary
Problem Areas	Aircraft Flight Crew Human Performance
Primary Problem	Aircraft

Narrative:

In cruise at FL370; I was the relief pilot sitting in the captain's seat when; for no apparent reason; we heard a loud bang and noticed the outer pane of the L1 window shattered. Anticipating a pressurization problem; which never happened; we started an immediate descent to 10000 ft; got the captain on the flight deck; and followed our checklist procedure to land at the nearest suitable field. A faulty window heat controller was the cause of the problem and I don't think anything could be done to prevent it from happening again. I feel like we handled the situation appropriately but thought it wise to submit a report just the same.

Original NASA ASRS Text

Title: B767-300 DIVERTS ENROUTE DUE TO SHATTERED OUTER PANE COCKPIT WINDOW.

Narrative: IN CRUISE AT FL370; I WAS THE RELIEF PLT SITTING IN THE CAPT'S SEAT WHEN; FOR NO APPARENT REASON; WE HEARD A LOUD BANG AND NOTICED THE OUTER PANE OF THE L1 WINDOW SHATTERED. ANTICIPATING A PRESSURIZATION PROB; WHICH NEVER HAPPENED; WE STARTED AN IMMEDIATE DSCNT TO 10000 FT; GOT THE CAPT ON THE FLT DECK; AND FOLLOWED OUR CHKLIST PROC TO LAND AT THE NEAREST SUITABLE FIELD. A FAULTY WINDOW HEAT CTLR WAS THE CAUSE OF THE PROB AND I DON'T THINK ANYTHING COULD BE DONE TO PREVENT IT FROM HAPPENING AGAIN. I FEEL LIKE WE HANDLED THE SITUATION APPROPRIATELY BUT THOUGHT IT WISE TO SUBMIT A RPT JUST THE SAME.

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.