# SDR SWAA2021080294610

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 13, 2021
- Submitted: August 2, 2021
- Operation: Air carrier
- Aircraft: [N962WN](https://openairdocs.org/aircraft/N962WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 36963
- Aircraft time: 33,006 hours, 20,057 cycles
- System (JASC): [5310 · Fuselage Main, Structure](https://openairdocs.org/jasc/5310)
- Part: Beam
- Condition: Corroded
- Location: Bs 259
- 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/SWAA2021080294610

## Discrepancy

CORROSION ON FLIGHT DECK LATERAL BEAM BS 259.5; LBL 5; WL 208 (MARKED) ; / [01] REMOVED CORROSION IN A 1.2' X 0.6' AREA; MAX DEPTH OF BLENDOUT .006' PER SRM 51-10-02-0G-0; MEASURED WITH MICROMETER CAL ID: IS000461 S/N: 67126205 CAL DATE: 01/2021. ORIGINAL THICKNESS IS .094' PER DWG 141A7434. FOUND TO BE OUT OF LIMITS DUE TO NO LIMITS GIVEN IN SRM.; [02] VERIFIED REMOVAL OF CORROSION IN A 1.2' X 0.6' AREA; MAX DEPTH .006' PER SRM 51-10-02-0G-0; MEASURED WITH CAL ID: IS000461 SN: 67126205. ORIGINAL THICKNESS IS .094' PER DWG 141A7434; OUT OF LIMITS DUE TO NO LIMITS GIVEN IN SRM.; [03] REMOVED NUTPLATE AT BS 259.5; LBL 5; WL 208 PER SRM 51-40-02-0G-0; [04] HFEC INSPECTED BLENDED AREA AND OPEN (NUTPLATE) HOLE PER 737NDT PART 6 51-00-00 PROCEDURES 23 AND 16. NO CRACKS FOUND. CAL ID IS000450 S/N N500D000M120071; [05] REFER TO FAULT TTG8Q005S5ZL FOR REPAIR RESOLUTION.; [06] STEP 5 ENTERED IN ERROR; [07] CARD COMPLETED ON ENGINEERING 21-153-02007; [08] VERIFIED CARD COMPLETED ON ENGINEERING 21-153-02007

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