# SDR SWAA2022060902025

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 2, 2022
- Submitted: June 9, 2022
- Operation: Air carrier
- Aircraft: [N477WN](https://openairdocs.org/aircraft/N477WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 33988
- Aircraft time: 60,414 hours, 35,826 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Sidewall Support
- Condition: Corroded
- Location: Aft Cargo
- 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/SWAA2022060902025

## Discrepancy

CORROSION ON AFT CARGO BAY FLOOR TO SIDEWALL SUPPORT AT RBL 21 BS 727C+10; BS 727D+6; BS 727D+10; BS 727D+14; BS 727E+2; BS 727E+6; BS 727E+10; BS 727E+18. / [01] REMOVED CORROSION FROM R/H ACB FLOOR TO SIDEWALL SUPPORT AT BS727D+10 MEASURED 1.9"L X 0.9"W AND 0,004"DEEP, ORIGINAL THICKNESS OF 0.040" FOUND TO BE OUT OF LIMITS PER SRM 53-00-53-1A-2 REMOVED CORROSION FROM R/H ACB FLOOR TO SIDEWALL SUPPORT AT BS727E+2 MEASURED 2.1"L X 0.9"W AND 0,021"DEEP, ORIGINAL THICKNESS OF 0.040" FOUND TO BE OUT OF LIMITS PER SRM 53-00-53-1A-2 REMOVED CORROSION FROM R/H ACB FLOOR TO SIDEWALL SUPPORT AT BS727E+10 MEASURED 2.5"L X 1.1"W AND 0,015"DEEP, ORIGINAL THICKNESS OF 0.040" FOUND TO BE OUT OF LIMITS PER SRM 53-00-53-1A-2 REMOVED CORROSION FROM R/H ACB FLOOR TO SIDEWALL SUPPORT AT BS727E+18 MEASURED 1"L X 0.8"W AND 0,010"DEEP, ORIGINAL THICKNESS OF 0.040" FOUND TO BE OUT OF LIMITS PER SRM 53-00-53-1A-2 CAL ID PIN POINT DEPTH GAUGE ATS1225 S/N UNKNOWN DUE 07/2022 [03] UPDATED MEASUREMENTS;[04] VERIFIED CORRECTIVE ACTION 1;[05] WORK TO BE COMPLETED ON CUSTOMER CARD TTG8Q00C8935 (FUSE 5104);[06] WORK TO BE COMPLETED ON CUSTOMER CARD TTG8Q00C8935;[07] VERIFIED CORRECTIVE ACTION #5<BR>WORK TO BE COMPLETED ON CUSTOMER CARD TTG8Q00C8935 (FUSE 5104)

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