# SDR SWAA2023031302139

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 11, 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: Threshold
- 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/SWAA2023031302139

## Discrepancy

CORROSION ON FWD CARGO BAY THRESHOLD AT RBL 29 BS 440+7; BS 440+17. (MARKED)<[01] VERIFIED APPLICABILITY IAW SRM 53-30-15-0L-1 FOR IDENTIFICATION AND SRM 53-30-15-1A-1 FOR ALLOWABLE DAMAGE.<BR>STEPS 1 AND 2 PARTIAL.;[02] VERIFIED CORRECTIVE ACTION STEP 1.;[03] LOCATED AND DRILLED NEW FWD CARGO BAY THRESHOLD AT RBL 29 BS 440 TO BS 495 I.A.W SRM 51-40-05-0G-0 AND DWG 143A8122.;[04] VERIFIED CORRECTIVE ACTION STEP 3.;[05] JOB CARD WILL BE ACCOMPLISHED ON N/C TTG8Q00HSBYJ;[06] JOB CARD WILL BE ACCOMPLISHED ON CARD 5330-E-16461-NG [TTG8Q004DRF3];[07] UP DATED PARTS REQUIREMENTS;[08] VERIFIED CORRECTIVE ACTION STEPS5;6 AND 7. TASK CARD COMPLETE.;[09] VERIFIED MEASUREMENT TABLE.

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