What was found
CLIMBING THROUGH 15,000 FT CABIN DOOR WARNING LIGHT ILLUMINATED. DEPRESSURIZED CABIN AND RETURNED TO BASE. REPLACED UPPER FORWARD DOOR SWITCH.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
CLIMBING THROUGH 15,000 FT CABIN DOOR WARNING LIGHT ILLUMINATED. DEPRESSURIZED CABIN AND RETURNED TO BASE. REPLACED UPPER FORWARD DOOR SWITCH.