# SDR CALA2026100620128

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 2, 2026
- Submitted: October 6, 2026
- Operation: Air carrier
- Aircraft: [N77578](https://openairdocs.org/aircraft/N77578), registered now
- Make and model: Boeing 737-9
- Registry model: [Boeing 737-9](https://openairdocs.org/model/boeing-737-9) (OpenAirDocs)
- Aircraft serial: 67613
- Aircraft time: 10,020 hours, 3,263 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Intercostal
- Part number: 147A75802
- Condition: Corroded
- Location: Zone 200
- 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/CALA2026100620128

## Discrepancy

SMALL SURFACE CORROSION AT INTERCOSTAL FWD I/B SIDE FASTENER HEAD BS 927 S-27R.   CLEANED AREA AND REMOVED FASTENER AT FWD I/B STA. 927L-STA. 927R, FOUND NO EVIDENCE OF DAMAGED ONLY DAMAGED PRIMER AROUND FASTENER HOLE. INSTALLED NEW FASTENER AT INTERCOASTAL AND TREATED AND RESTORED ITS FINISHES AS PER DWG 147A7500 AND SRM-51-40-02-0G-0 SRM-51-20-01-0G-0.

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