What was found
FLIGHT 5920 HIGH PITCH NOISE FROM SERVICE DOOR DURING CLIMB, AIRCRAFT RETURNED TO THE FIELD. REPLACED THE SERVICE DOOR SEAL.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
FLIGHT 5920 HIGH PITCH NOISE FROM SERVICE DOOR DURING CLIMB, AIRCRAFT RETURNED TO THE FIELD. REPLACED THE SERVICE DOOR SEAL.