# SDR SWAA2020112429417

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 10, 2020
- Submitted: November 24, 2020
- Operation: Air carrier
- Aircraft: [N8657B](https://openairdocs.org/aircraft/N8657B), registered now
- Make and model: Boeing 737-8H4
- Registry model: [Boeing 737-8H4](https://openairdocs.org/model/boeing-737-8h4) (OpenAirDocs)
- Aircraft serial: 42535
- Aircraft time: 20,411 hours, 9,034 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Floor Support
- Condition: Corroded
- Location: Bs 500a-500i
- 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/SWAA2020112429417

## Discrepancy

FWD PIT RIGHT FLOOR SUPPORT Z ANGLE UPPER SURFACE CORRODED FROM STA 500A+10' TO STA 500I AT RBL 24 AND W/L 157.  REMOVED CORROSION AT RT Z ANGLE STA 500A TO 500I AS MARKED, IAW SRM 51-10-02-0G-0 AND SRM 53-00-53-1A-2.  VERIFIED WITH 10X MAGNIFICATION.  ORIGINAL THICKNESS .040' AT STA 500A+10 .034'; STA 500C+18 .035'; STA 500D+10 .032' AND STA 500H+17 .033'.  ALL OUT OF LIMITS, IAW SRM 53-00-53-1A-1 FIG 103.  TOOL: 36644 DUE: 08/24/21.  REMOVED OUT OF LIMITS FWD CARGO RT Z ANGLE FROM STA 500A TO 500I AND INSTALLED RT ZANGLE REPAIR PARTS, IAW SRM 53-00-53-2R-5.  APPLIED CIC IAW SRM 53-00-53-2R-5 STEP N P/N 146A7501-188.

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