# SDR SWAA2023042521215

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 27, 2023
- Submitted: April 25, 2023
- Operation: Air carrier
- Aircraft: [N8529Z](https://openairdocs.org/aircraft/N8529Z), registered now
- Make and model: Boeing 737-8H4
- Registry model: [Boeing 737-8H4](https://openairdocs.org/model/boeing-737-8h4) (OpenAirDocs)
- Aircraft serial: 36974
- Aircraft time: 19,994 hours, 9,669 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Angle
- Condition: Corroded
- Location: Zn 100 Fus Lower
- 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/SWAA2023042521215

## Discrepancy

CORROSION ON 'Z' ANGLE STA 992 2 EA AREAS ; LBL 37; LBL 43; WL 208 UPPER SURFACE.<[01] UPDATED MEASUREMENTS. UPON FURTHER INVESTIGATION; THERE'S NO ALLOWABLE DAMAGE AND PART WILL BE REPLACE IAW SRM 51-10-02 STEP 9. REMOVED Z ANGLE AT STA 992.2 LBL37; LBL43; AND WL208 IAW SRM 51-40-02.;[02] VERIFIED CORRECTIVE ACTION 1 AND MEASUREMENT TABLE.;[03] LOCATED AND DRILLED NEW Z ANGLE FOR BS 992 LBL 37 TO LBL 43 WL 208 IAW SRM 51-40-05-0G-0 OK TO INSTALL.;[04] VERIFIED CORRECTIVE ACTION 3 WITH OK TO INSTALL GIVEN;[05] INSTALLED Z ANGLE AT BS 992 LBL 37 TO LBL 43 WL 208 IAW SRM 51-40-02-0G-0 AND BOEING DWG 147A5700 APPLIED FILLET SEAL IAW AMM 51-31-00-390-804;[06] VERIFIED CORRECTIVE ACTION 5

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