# SDR CALA2023091402783

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 12, 2023
- Submitted: September 14, 2023
- Operation: Air carrier
- Aircraft: [N16709](https://openairdocs.org/aircraft/N16709), registered now
- Make and model: Boeing 737724
- Aircraft serial: 28779
- Aircraft time: 79,014 hours, 28,388 cycles
- System (JASC): [5315 · Fuselage Main, Floor Beam](https://openairdocs.org/jasc/5315)
- Part: Floorbeam
- Part number: 147A55068
- Condition: Corroded
- Location: Sta 986.5
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2023091402783

## Discrepancy

SUPPORT TASK: MAIN CABIN STA 986.5 FLOOR BEAM UPPER SURFACE HAS CORROSION AT RBL-36, TRANSCRIBED FROM HAECO GSO N/R 9282552 REMOVED CORROSION FROM STA 986.5 FLOORBEAM AT RBL36 AND RBL5. ORIGINAL MATERIAL THICKNESS .150, REMOVED .015, REMAINING .135 OUT OF LIMITS IAW B737-700 SRM 53-70-51. FABRICATED AND INSTALLED T -CAP REPAIR FROM LBL10 TO RBL58 IAW B737-700 SRM 53-70-51-2R-4.

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