# SDR CALA2026081118486

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 7, 2026
- Submitted: August 12, 2026
- Operation: Air carrier
- Aircraft: [N77539](https://openairdocs.org/aircraft/N77539), registered now
- Make and model: Boeing 737824
- Aircraft serial: 63642
- Aircraft time: 27,357 hours, 10,366 cycles
- Engine: Cfmint CFM567B27
- System (JASC): [5330 · Fuselage Main, Plate/Skin](https://openairdocs.org/jasc/5330)
- Part: Plate
- Part number: 141A3523U17
- Condition: Corroded
- Location: Zone 100
- 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/CALA2026081118486

## Discrepancy

LOWER TCAS ANTENNA MOUNTING SURFACE SKIN HAD GOUGES AND CORROSION.   REMOVED AND REPLACED ADAPTER PLATE IAW DWG 141A3501, REV- AND SRM 51-40-02. RESTORED PROTECTIVE TREATMENT IAW  AMM 51-21-99.

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