# SDR SWAA2022083139523

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 7, 2022
- Submitted: August 31, 2022
- Operation: Air carrier
- Aircraft: [N8647A](https://openairdocs.org/aircraft/N8647A), registered now
- Make and model: Boeing 737-8H4
- Registry model: [Boeing 737-8H4](https://openairdocs.org/model/boeing-737-8h4) (OpenAirDocs)
- Aircraft serial: 42528
- Aircraft time: 27,244 hours, 12,560 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Intercostal
- Condition: Corroded
- Location: Aft Fuselage
- 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/SWAA2022083139523

## Discrepancy

CORROSION. AT AFT CABIN WET AREA FLOOR SUPPORT FASTENER HOLE LBL. 50 BETWEEN STA 947.5 AND STA 967 WL208.1 / [01] LOCATED AND DRILLED AT AFT CABIN WET AREA FLOOR SUPPORT LBL 50 BETWEEN STA 947.5 AND STA 967 WL 208.1 AS PER SRM 51-40-05-0G-0;[02] LATE ENTRY REMOVED FLOOR SUPPORT AT AFT CABIN WET AREA LBL 50 BETWEEN STA 947.5 AND STA 967 WL208.1 AS PER SRM 51-40-02-0G-0;[03] REMOVED CORROSION AT AFT CABIN WET AREA FLOOR SUPPORT FASTENER HOLE LBL. 50 BETWEEN STA 947.5 AND STA 967 CORROSION EXCCEDED 30% OF NOMINAL THICHNESS FOUND TO BE OUT OF LIMITS IRW 53-70-51-1A-1;[04] VERIFIED 1;2;AND 3;OK TO TREAT/PRIME HOLES IN NEW INTERCOSTAL.;[05] TREATED AND PRIME NEW HOLES IN NEW INTERCOSTAL IRW AMM 51-21-41-370-803;51-21-72-370-803;[06] VERIFIED 5;OK TO INSTALL INTERCOSTAL;[07] CORRECTION TO STEP 6;OK TO INSTALL NEW INTERCOSTAL.;[08] INSTALLED NEW INTERCOSTAL AT AFT CABIN WET AREA FLOOR SUPPORT LBL 50 BETWEEN STA 947.5 AND STA 967 IRW SRM 51-40-02;[09] VERIFIED 8;COMPLETE;[10] VERIFIED ALL STEPS COMPLETE

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain, except the copies of manufacturers’ service documents, which belong to their rights holders.