As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CAPTAIN'S WINDSCREEN DEVELOPED CRACK THAT CONTINUED TO GROW AT FL 310. STOPPED GROWING ONCE WE SLOWED DOWN & DESCENDED. CORROBORATED A CRACK ON CAPT'S WINDSHIELD INNER PANE, APPROX. 22 INCHES LONG, FROM TOP LEFT CORNER DIAGONAL TOWARD RIGHT BOTTOM CORNER. LOOKS LIKE ARCING ORIGINATED THE CRACK. MPN: A2191301220200 CPN: 5311028 QTY 1. REMOVAL/INSTALLATION OFF MPN: NP175201-5 POS: ONL SRL: 15152H4255. REMOVED L-1 WINDSHIELD ASSY AND POSITIONED NEW ASSY IN FRAME IAW AMM 56-11-11-04 PP 1 THRU 10 STEP 6. REQUIRES COMPLETION.