# SDR SWAA2022072922266

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 23, 2022
- Submitted: July 29, 2022
- Operation: Air carrier
- Aircraft: [N428WN](https://openairdocs.org/aircraft/N428WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 29844
- Aircraft time: 66,134 hours, 39,057 cycles
- System (JASC): [5313 · Fuselage Main, Longeron/Stringer](https://openairdocs.org/jasc/5313)
- Part: Stringer
- Condition: Cracked
- Location: 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/SWAA2022072922266

## Discrepancy

FORWARD PASSENGER COMPARTMENT STR. 15R CRACKED AT FASTENER HOLE B.S. 460+4. (51-001) / [01] REMOVED[ 19] FABRICATED SPLICED AND SHIMS BOTH SIDE AT FWD PASSENGER COMP STR 15 R FWD STA 460+4' IAW B737 SRM 53-00-03-2R-1.;[20] PERFORMED HFEC AT CUT OUT AT STR-15R STA 450; AS PER NDTM PART 6; 51-00-00 PROCEDURE 23. NO CRACKS<BR>[NORTEC 600 ; B/C 166316 ; CALIB.DUE- 10/22];[21] PERFORMED HARDNESS TEST IAW BAC 5946. HARDNESS VALUE INDICATED : 55 ; SPECS RANGE : 79-94. PART REJECTED .<BR>[ROCKWELL HARDNESS TESTER ;B/C 170035; CALIB.DUE 5/23];[22] PERFORMED HARDNESS TEST IAW BAC 5946. HARDNESS VALUE INDICATED : 55 ; SPECS RANGE : 79-94. PART REJECTED .<BR>[ROCKWELL HARDNESS TESTER ;B/C 170035; CALIB.DUE 5/23];[23] STARTED DRILLING NEW STRINGER SECTION ( STR 15R - FWD SECTION ) STA 460 AS PER B737-700 SRM 53-00-03-2R-1.;[33] INSTALLED REPAIR PARTS AS PER SRM 53-00-03-2R-1 FIGURE 205 AND 51-40-02-0G-0.;

---
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.