# SDR 9WGA2026032635609

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 13, 2024
- Submitted: March 26, 2026
- Operation: Air carrier
- Aircraft: [N356KD](https://openairdocs.org/aircraft/N356KD), registered now
- Make and model: Boeing 747446
- Aircraft serial: 25356
- Aircraft time: 83,500 hours, 17,029 cycles
- Engine: Ge CF680C2B1F
- System (JASC): [7200 · Engine (Turbine/Turboprop)](https://openairdocs.org/jasc/7200)
- Part: Acoustic Liner
- Condition: Corroded
- Location: Zone 400
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/9WGA2026032635609

## Discrepancy

DURING HEAVY MAINTENANCE CHECK CORROSION SIGNS UNDER ACOUSTIC LINER ENGINE #2 POSITION 3 AND 6 O'CLOCK (REPIAR).  CORROSION IN ACOUSTIC INNER LINER ENGINE #2 POSITION 3 AND 6 O'CLOCK WAS CLEANED IAW B747-400F AMM 51-00-53.  THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.

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