# SDR CALA2026081318547

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 28, 2026
- Submitted: August 13, 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): [5315 · Fuselage Main, Floor Beam](https://openairdocs.org/jasc/5315)
- Part: Floorbeam
- Part number: 147A550429
- 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/CALA2026081318547

## Discrepancy

CORROSION ON THE TEE FITTING, BS  947, RBL 36, FWD OF R2 DOOR.    REMOVED DAMAGE, HFEC OPEN HOLES & CUT AREA,NO DEFECTS NOTED. ROTO PEENED, FABRICATED & LOCATED REPAIR PARTS,  INSTALLED AND RESTORED COATINGS IAW SRM 53-70-51-2R-5, AND DWG 147A5650. THIS IS A CAT 'A' REPAIR. NO FURTHER ACTION REQUIRED.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.