# SDR SWAA2023050927751

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 14, 2023
- Submitted: May 9, 2023
- Operation: Air carrier
- Aircraft: N551WN
- Make and model: Boeing 737-76Q
- Registry model: [Boeing 737-76Q](https://openairdocs.org/model/boeing-737-76q) (OpenAirDocs)
- Aircraft serial: 30280
- Aircraft time: 66,624 hours, 41,198 cycles
- System (JASC): [5340 · Fuselage Main, Attach Fittings](https://openairdocs.org/jasc/5340)
- Part: Attach Angle
- Condition: Corroded
- Location: Zn 200 Fus Top
- 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/SWAA2023050927751

## Discrepancy

CORROSION ON INTERCOSTAL TO WEB ATTACH ANGLE BS767+2; 767+5; 767+9; 767+16; 767+19 RBL21 WL156.<[01] FOUND TO BE OUT OF LIMITS EXFOLIATED CORRODED WITH MORE THE 50 % OF MATERIAL LOST IWA B 737-700 SRM 53-60-15 REMOVED DAMAGE PART PER SRM 51-40-02;[02] SRM 53-60-15-1A-1 IS THE ALLOWABLE APPLICABILITY;[03] RECEIVED NEW ATTACH ANGLE LOCATED AND DRILLED <BR>AT FCB BS767+2 TO -BS767+19 RBL21 WL 156<BR>P/N 146A8125-53 LOT# 1522951-1 IAW SRM 51-40-05<BR>AND DWG 146A0081 REV:A OK TO INSTALL;[04] VERIFIED CORRECTIVE ACTION 3 AND THE MEASUREMENT TABLE.;[05] INSTALLED ATTACH ANGLE AT BS 767+2 TO 767+19 RBL21 WL 156<BR>IAW SRM 51-40-02 AND DWG 146A0081 REV:A JOB COMPLETED;[06] VERIFIED CORRECTIVE ACTION 5.;[07] VERIFIED MEASUREMENT TABLE.

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