# SDR SWAA2023051530023

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 21, 2023
- Submitted: May 15, 2023
- Operation: Air carrier
- Aircraft: [N8534Z](https://openairdocs.org/aircraft/N8534Z), registered now
- Make and model: Boeing 737-8H4
- Registry model: [Boeing 737-8H4](https://openairdocs.org/model/boeing-737-8h4) (OpenAirDocs)
- Aircraft serial: 63578
- Aircraft time: 19,732 hours, 9,539 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Intercostal
- Condition: Corroded
- Location: Zn 200 Fus Top
- 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/SWAA2023051530023

## Discrepancy

CORROSION ON INTERCOSTAL UPPER SURFACE STA 949; LBL 49; WL 208.<[01] EVALUATED DAMAGE ON INTERCOSTAL UPPER SURFACE STA 949; LBL 49; WL 208.AND FOUND TO BE OUT LIMITS DUE TO LOSS OF MATERIAL EXCEED LIMITS GIVEN ON SRM 53-70-51-1A-1 ALLOWABLE DAMAGE 1 ORIGINAL MATERIAL THICKNESS 0.215' REMAINING MATERIAL THICKNESS IS 0.165' SRM 51-10-02-0G-0 PAR 9.C REPLACEMENT OF THE PART IS APPLICABLE.;[02] VERIFIED CORRECTIVE ACTION ITEM 1.;[03] TOOL USED CORRECTIVE ACTION 1<BR>USING DEPTH GAGE<BR>ID NCX000697<BR>DUE 09/2023;[04] LOCATED AND DRILLED NEW INTERCOSTAL STA 949; LBL49; WL 208 I.A.W BOEING DWG 147A5650 AND SRM 51-40-05-0G-0; PART BEING REMOVED AND INSTALLED ON COSTUMER CARD TTG8Q00KKYYE STEP 1.;[05] VERIFIED CORRECTION ACTION 3 AND 4.;[06] VERIFIED ALL CORRECTION ACTIONS AND MEASUREMENT TABLE.;[07] VERIFIED ALL CORRECTION ACTIONS; CARD COMPLETE.

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