As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLIMBING THROUGH 24,000 FEET, CABIN ALTITUDE LIGHT CAME ON. TESTED ALTITUDE WARNING SWITCH SYSTEM IAW MM 21-30-08. SYSTEM OPERATION CHECKS GOOD. FOUND CARGO DOOR SEAL PULLED OUT. REINSTALLED SEAL AS NEEDED. PRESSURIZED AIRCRAFT. CARGO DOOR LEAK CHECK GOOD.