# SDR 2020FA0000454

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 21, 2020
- Submitted: October 23, 2020
- Operation: General aviation
- Aircraft: [N379QS](https://openairdocs.org/aircraft/N379QS), registered now
- Make and model: Emb EMB-505
- Registry model: [EMB EMB-505](https://openairdocs.org/model/embraer-executive-emb-505) (OpenAirDocs)
- Aircraft serial: 50500294
- Aircraft time: 4,172 hours, 3,307 cycles
- System (JASC): [5520 · Elevator Structure](https://openairdocs.org/jasc/5520)
- Part: Balance Weight
- Condition: Corroded
- Location: Lt Elevator
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2020FA0000454

## Discrepancy

DURING ACCOMPLISHMENT OF EMBRAER SB 505-55-0004 REV 01 PART I,II,III (DATED 06/24/2020) WE NOTED THE FOLLOWING MASS BALANCE WEIGHTS BELOW TOLERANCE: LEFT ELEVATOR: ADJUSTABLE WEIGHTS PART NUMBER PE915109-L33 (11 EACH BELOW MINIMUM OF 84G); HORN MASS WEIGHT PART NUMBER PE915109-L42 (1 EACH BELOW MINIMUM OF 1095G).  RIGHT ELEVATOR MASS BALANCE WEIGHTS BELOW TOLERANCE: ADJUSTABLE WEIGHTS PART NUMBER PE915109-L33 (11 EACH BELOW MINIMUM OF 84G); HORN MASS WEIGHT PART NUMBER PE915109-L42 (1 EACH BELOW MINIMUM OF 1095G), ALL WEIGHTS HAVE BEEN REPLACED WITH A NEW MASS WEIGHTS AND THE ELEVATOR BALANCING WAS PERFORMED WITH NO FURTHER DEFECTS NOTED.  THE LEFT ELEVATOR WAS RE-IDENTIFIED TO PART NUMBER 505-11082-601 AND THE RIGHT TO PART NUMBER 505-11082-602, AS PER SB INSTRUCTIONS.  AT THE RUDDER WE NOTED THE ADJUSTABLE WEIGHTS PART NUMBER PE915109-L27 (4 EACH BELOW MINIMUM OF 455G), ALL WEIGHTS HAVE BEEN REPLACED WITH A NEW MASS WEIGHTS AND THE RUDDER BALANCING WAS PERFORMED WITH NO FURTHER DEFECTS NOTED.  THE RUDDER WAS RE-IDENTIFIED TO PART NUMBER 505-39061-619, AS PER SERVICE BULLETIN INSTRUCTIONS.  AT THE AILERON MASS WEIGHTS PART NUMBER PE915109-L31(1 EACH BELOW MINIMUM OF 1787G), ALL WEIGHTS HAS BEEN REPLACED WITH A NEW MASS WEIGHTS AND THE AILERON BALANCING WAS PERFORMED WITH NO FURTHER DEFECTS NOTED.  THE AILERON WAS RE-IDENTIFIED TO PART NUMBER 505-14735-643, AS PER SERVICE BULLETIN INSTRUCTIONS.  THIS REPORT COMPLIES WITH FAA 14 CFR PART 135 OPERATOR’S GMM REQUIREMENTS.

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