# SDR SWAA2021072688276

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 27, 2021
- Submitted: July 26, 2021
- Operation: Air carrier
- Aircraft: [N7844A](https://openairdocs.org/aircraft/N7844A), registered now
- Make and model: Boeing 737752
- Aircraft serial: 35118
- Aircraft time: 47,085 hours, 24,962 cycles
- System (JASC): [5512 · Horizontal Stabilizer, Plate/Skin](https://openairdocs.org/jasc/5512)
- Part: Skin
- Condition: Cracked
- Location: Horizontal Stab
- 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/SWAA2021072688276

## Discrepancy

CRACK INDICATION FOUND ON LT HORIZONTAL STABILIZER LOWER SKIN LOCATED AT STA 193.90 AND 16 INCH. FROM THE FRONT SPAR. LENGTH = 0.900 INCH. APPROX. ; 2021-296464 / [01] TOOL USED: P/N: NORTEC 600D; S/N: 200048001; DUE DATE: 24-FEB-22; [02] TOOL USED CALIPER PN: 700-113-10 SN: 0019306 DUE DATE 14OCT21; [03] PERFORMED PERMANENT REPAIR ON LOWER INSPAR SKIN AT 12 INCH FROM THE FRONT SPAR AND 12 INCH FROM THE REAR SPAR STAB STA 193.90 LT HORIZONTAL STABILIZER IAW B737-700 SRM 55-10-01-2R-11 REPAIR 11 FIGURE 204 DETAIL B MATERIAL USED: ALUMINUM SHEET P/N 2024T3 0.080 P/O 2021153404 AND ALUMINUM SHEET P/N 2024T3-063 P/O 2020205354.; [04] PERFORMED CAT B REPAIR ON LOWER INSPAR SKIN AT 12 INCH FROM THE FRONT SPAR AND 12 INCH FROM THE REAR SPAR STAB STA 193.90 LT HORIZONTAL STABILIZER IAW B737-700 SRM 55-10-01-2R-11 REPAIR 11 FIGURE 204 DETAIL B MATERIAL USED: ALUMINUM SHEET P/N 2024T3 0.080 P/O 2021153404 AND ALUMINUM SHEET P/N 2024T3-063 P/O 2020205354.; [05] PERFORMED CAT B REPAIR ON LOWER INSPAR SKIN AT 12 INCH FROM THE FRONT SPAR AND 12 INCH FROM THE REAR SPAR STAB STA 193.90 LT HORIZONTAL STABILIZER IAW B737-700 SRM 55-10-01-2R-11 REPAIR 11 FIGURE 204 DETAIL B MATERIAL USED: ALUMINUM SHEET P/N 2024T3 0.080 P/O 2021153404 AND ALUMINUM SHEET P/N 2024T3-063 P/O 2020205354. RII INSPECTION DONE.

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