# SDR SWAA2022061607776

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 13, 2022
- Submitted: June 16, 2022
- Operation: Air carrier
- Aircraft: [N7876A](https://openairdocs.org/aircraft/N7876A), registered now
- Make and model: Boeing 737-7Q8
- Registry model: [Boeing 737-7Q8](https://openairdocs.org/model/boeing-737-7q8) (OpenAirDocs)
- Aircraft serial: 29355
- Aircraft time: 50,771 hours, 27,451 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Threshold Web
- Part number: 143A812325
- Condition: Corroded
- Location: Aft Cargo Bay
- 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/SWAA2022061607776

## Discrepancy

CORROSION ON SUBTHRESHOLD WEB AT AFT CARGO BAY BS796 - BS834 RBL26 / [01] REMOVED CORROSION ON SUBTHRESHOLD WEB AT AFT CARGO BAY BS796 - BS834; RBL26; EVALUATED AS FOLLOW: L=1.7' W=0.8' D=0.015'; ORIGINAL THICKNESS 0.056'; MAT LOSS 0.015'; REMAINING THICKNESS 0.041'; AREA FOUND TO BE OUT OF LIMITS IAW SRM 53-60-15-1A-1 STEP 4G(2) B FIG 103 DETAIL D. TOOL USED: MICROMETER ID ATS1672; S/N 65092939; DATE DUE 03/2023.;[02] VERIFIED CORRECTIVE ACTION STEP 1.;[03] LOCATED AND DRILLED NEW WEB WITH P/N 146A8123-6;LOT#1487859-1;IAW SRM 51-10-05 AND DWG#146A8120;PART WILL BE INSTALLED WITH CUSTOMER CARD # 5360-E-16462-NG.ALL MAINTENANCE ACTION ARE COMPLETED REQUIRE FINAL BUY OFF.;[04] CORRECTIVE ACTION 3 ENTRY AN ERROR. LOCATED AND DRILLED NEW WEB WITH P/N 146A8123-25;LOT#1487859-1;IAW SRM 51-10-05 AND DWG#146A8120;PART WILL BE INSTALLED WITH CUSTOMER CARD # 5360-E-16462-NG.ALL MAINTENANCE ACTION ARE COMPLETED REQUIRE FINAL BUY OFF;[05] VERIFIED CORRECTIVE ACTION STEP 4. TASK COMPLETE.;[06] VERIFIED MEASUREMENT TABLE COMPLETE.

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