What was found
TENSION SPRING ON UPPER CABIN DOOR LATCH BECAME DISCONNECTED. CAUSED THE UPPER DOOR LATCH NOT TO LATCH/SEAL, ALLOWED RAIN TO ENTER.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
TENSION SPRING ON UPPER CABIN DOOR LATCH BECAME DISCONNECTED. CAUSED THE UPPER DOOR LATCH NOT TO LATCH/SEAL, ALLOWED RAIN TO ENTER.