# SDR SWAA2023031304213

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 17, 2023
- Submitted: March 13, 2023
- Operation: Air carrier
- Aircraft: [N289CT](https://openairdocs.org/aircraft/N289CT), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 36633
- Aircraft time: 50,940 hours, 30,659 cycles
- System (JASC): [5740 · Wing, Attach Fittings](https://openairdocs.org/jasc/5740)
- Part: Panel
- Condition: Cracked
- Location: Zn 500 Left Wing
- 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/SWAA2023031304213

## Discrepancy

LT WING L/E PANEL 521ZB O/B FWD CORNER IS CRACKED<[01] IDENTIFIED PANEL 521ZB MATERIAL IAW SRM 57-41-01-0I-4; FIGURE 2; SHEET1; TABLE 2; ITEM [1]. <BR><BR>CLEANED PANEL AND REMOVED FINISH ON TOOL SIDE TO EVALUATE DAMAGE IAW AMM 51-21-11-150-815 PARA. 17. C. AND D<BR><BR>VISUAL INSPECTION FOUND DAMAGE AT O/B FWD CORNER AND ADDITIONAL DAMAGE AT I/B FWD CORNER TO BE OUT OF ALLOWABLE LIMITS IAW SRM 57-41-01-1A-1 PARA 4. A. (5) (A). <BR><BR>REMOVED (2 EA.) BACK-UP PLATES TO FACILITATE REPAIR IAW SRM 51-40-02-0G-0 PARA 4.E. FIG 8. <BR><BR>REMOVED BONDED ALUMINUM FOIL TO FACILITATE REPAIR IAW SRM 51-70-14-2R-3 PARA 4.A.(1).-(2). AS GIVEN IN SRM 57-41-01-2R-1 PARA 2.E.(2). <BR><BR>DAMAGE WILL BE REPAIRED PER SRM 51-70-05-2R-6 AS DIRECTED PER SRM 57-41-01-2R-1 PARA 4.E.;[09] FABRICATED REPAIR FOIL USING BMS8-289 LOT# 1507307-1; AND INSTALLED USING BMS5-128 (EA-956) ADHESIVE LOT# JH2FAL7046; VACUUM BAGGED REPAIR; WITH COMPLETED SUCCESSFUL BLEED DOWN TEST USING GAUGE ID: ATS2798 CAL/DUE: 10/2023; AND CURED UNDER HEATLAMP MONITORED USING THERMOMETER ID: ATS2209 CAL/DUE: 10/2023; REMOVED VACUUM BAG SYSTEM; TRIMMED AND CLEANED REPAIR EDGES IAW SRM 51-70-14-2R-3 PAR. 4.A.(3)-(5); & (11)(A)-(L).[

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