# SDR CALA2023041901155

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 17, 2023
- Submitted: April 19, 2023
- Operation: Air carrier
- Aircraft: [N78866](https://openairdocs.org/aircraft/N78866), registered now
- Make and model: Boeing 757
- Aircraft serial: 32591
- Aircraft time: 64,846 hours, 19,472 cycles
- System (JASC): [5300 · Fuselage Structure (General)](https://openairdocs.org/jasc/5300)
- Part: Unknown
- Part number: 146N370085
- Condition: Corroded
- Location: Aft Lwr Cargo
- Stage of operation: IN
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2023041901155

## Discrepancy

AFT LOWER CARGO DRAIN MAST DOUBLER AND SUPPORT BRACKETS HAS CORROSION. REMOVED DRAIN MAST DOUBLER AND BLENDED CORROSION FOUND 100% MATERIAL LOSS. FABRICATED AND INSTALLED NEW DOUBLER IAW B757- 300 SRM 51-40-02 PARA 4AND7 AND BOEING DRAWING 146N3700

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