# SDR SWAA2022010642559

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 11, 2021
- Submitted: January 6, 2022
- Operation: Air carrier
- Aircraft: N770SA
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 30589
- Aircraft time: 69,290 hours, 41,022 cycles
- System (JASC): [5310 · Fuselage Main, Structure](https://openairdocs.org/jasc/5310)
- Part: Web
- Condition: Corroded
- Location: Fuselage
- 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/SWAA2022010642559

## Discrepancy

E&E COMPARTMENT LOWER AUXILIARY SILL; BETWEEN S-21L AND-23L AT STA 336 APPX. FOUND CORROSION ON WEB.   REMOVED WEB AT E&E COMPARTMENT LOWER AUXILIARY SILL; BETWEEN S-21L AND S-23L PER B737-700 SRM 51-40-02-0G-0; [02] VERIFIED STEP #1.  FABRICATED WEB P/N 141A1180-25 MAT USED 7075-O CLAD 0.040 PO#1696337 REF DWG#141A1180.  LOCATED AND DRILLED NEW WEB AT E&E COMPARTMENT LOWER AUXILIARY SILL; BETWEEN S-21L AND S-23L PER B737-700 SRM 51-40-05-0G-0 AND DWG #141A1180.  INSTALLED NEW WEB AT E&E COMPARTMENT LOWER AUXILIARY SILL; BETWEEN S-21L AND S-23L PER B737-700 SRM 51-40-02-0G-0 AND DWG# 141A1180.

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