# SDR SWAA2024100127721

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 19, 2024
- Submitted: October 1, 2024
- Operation: Air carrier
- Aircraft: [N7852A](https://openairdocs.org/aircraft/N7852A), registered now
- Make and model: Boeing 737-71B
- Registry model: [Boeing 737-71B](https://openairdocs.org/model/boeing-737-71b) (OpenAirDocs)
- Aircraft serial: 29371
- Aircraft time: 51,472 hours, 32,335 cycles
- System (JASC): [5315 · Fuselage Main, Floor Beam](https://openairdocs.org/jasc/5315)
- Part: Floorbeam
- 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/SWAA2024100127721

## Discrepancy

BS 986 LH; WL 208; LBL 5; 18; 26; 29; 35; 38; 43 HAS CORROSION IN NUT PLATE HOLES.<[01] REMOVED CORROSION FROM UPPER FLANGE OF BS 986.5 FLOOR BEAM; LBL 29-LBL 31; WL208 IN AN AREA OF 1'X.8'X.060' PER SRM 53-70-51-1A-1 2.B. CORROSION STILL EXISTS; ORIGINAL THICKNESS IS .150' AND REMAINING<BR>THICKNESS IS 0.090' FOUND TO BE OUT OF LIMITS PER SRM 53-70-51-1A-1 PARA. 4D (2) FIG. 103 DETAIL A. USING MICROMETER ID: ATS1672 DUE DATE:03/2025<BR><BR>BS 986 FLOOR BEAM UPPER FLANGE LBL 5- LBL43; WL 208 WILL BE REPAIRED ON CUSTOM CARD TTG8Q00VBFUH;[02] MADE A STATEMENT ON TTG8Q00VBFUH THAT THIS CARD WAS TRANSFERRED

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