# SDR SWAA2023031303235

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 14, 2023
- Submitted: March 13, 2023
- Operation: Air carrier
- Aircraft: [N289CT](https://openairdocs.org/aircraft/N289CT), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 36633
- Aircraft time: 50,940 hours, 30,659 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Support
- 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/SWAA2023031303235

## Discrepancy

R/H FLOOR TO SIDEWALL SUPPORT IS CORRODED AT FASTENER HOLES UPPER SURFACE; BS867+8; +11; +15; RBL22; WL164<[01] REMOVED CORROSION ON FLOOR TO SIDEWALL SUPPORT AT RBL22;WL164;BS867+8.MEASURES:L=.7;W=.7;D=.010';ORIGINAL TICKNESS IS 0.040';REMAINING TICKNESS IS 0.030';FOUND AREA OUT OF LIMITS;IAW SRM 53-00-53-1A-2 ALLOWABLE DAMAGE 2;PARAG 4A(2) DETAIL D FIG.103 AND SRM 53-70-53-0I-2 IDENTIFICATION 2;TABLE 2 FIG 2.TOOL USED ATS2473;S/N UNKNOWN;DUE:08/2023.;[02] ALL PROCESS WILL BE COMPLETED WITH CARD#TTG8Q00HTZSK.;[03] VERIFIED CORRECTIVE ACTION STEPS 1 AND 2.;[04] THE INSTALLATION WILL BE ACCOMPLISHED WITH THE CUSTOMER CARD #TTG8Q004G46G STEP# 33;[05] CORRECTED MEASUREMENT TABLE #17.;[06] VERIFIED CORRECTIVE ACTIONS 4; 5 AND MEASUREMENT TABLE.

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