<< >> NASA ASRS Report 1229177, December 2014

A B757 captain's windshield delaminated at FL390. A descent was began; an emergency was declared and the flight diverted to a nearby airport.

Attributes
ACN	1229177
Time
Date	201412
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Light	Daylight
Aircraft 1
Make Model Name	B757-200
Operating Under FAR Part	Part 121
Flight Phase	Cruise
Flight Plan	IFR
Component
Aircraft Component	Cockpit Window
Person 1
Function	Pilot Not Flying Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Person 2
Function	First Officer Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Aircraft Equipment Problem Less Severe

Narrative:

Near top of descent (FL390); I noticed that the left forward windshield appeared to start de-laminating. At that time we requested a lower altitude and began a descent. I started to reference the QRH and about that time the delamination rate started to advance quite rapidly. I directed first officer to declare an emergency and as he was accomplishing this; the windshield shattered. We continued the descent while running QRH; and it became apparent that there was a closer airfield and requested a divert there. Continued descent to 10;000 ft and remained there until ready for continuous descent. Landed; exited runway and discontinued emergency. Taxied to the ramp; and shut down. No injuries; windscreen remained intact.

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Original NASA ASRS Text

Title: A B757 Captain's windshield delaminated at FL390. A descent was began; an emergency was declared and the flight diverted to a nearby airport.

Narrative: Near top of descent (FL390); I noticed that the left forward windshield appeared to start de-laminating. At that time we requested a lower altitude and began a descent. I started to reference the QRH and about that time the delamination rate started to advance quite rapidly. I directed First Officer to declare an emergency and as he was accomplishing this; the windshield shattered. We continued the descent while running QRH; and it became apparent that there was a closer airfield and requested a divert there. Continued descent to 10;000 ft and remained there until ready for continuous descent. Landed; exited runway and discontinued emergency. Taxied to the ramp; and shut down. No injuries; windscreen remained intact.

Data retrieved from NASA's ASRS site 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.