Early last year the crack started, not bad for 25 years of hot and cold with an occasional bird strike.
The 12" crack showed itself in February and began to grow.
No worries here since the glass was cracked on the outside of the 1/4" laminated safety plate. Lami' will not fall apart (windshield glass).
By July of this year, the crack was about 7' long and growing at about 3" per month. Click on the pictures for more detail.
My custom hoist to lift the glass into place (110 lbs) was scoffed at and the three of us just lifted it into place.
All new trim and the job was done correctly. Remove and Replace in six hours.