# SDR SWAA2022070116114

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 7, 2022
- Submitted: July 1, 2022
- Operation: Air carrier
- Aircraft: [N255WN](https://openairdocs.org/aircraft/N255WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 32513
- Aircraft time: 52,870 hours, 31,550 cycles
- System (JASC): [5511 · Horizontal Stabilizer, Spar/Rib](https://openairdocs.org/jasc/5511)
- Part: Stiffener
- Condition: Cracked
- Location: R/H Horiz. Stab.
- 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/SWAA2022070116114

## Discrepancy

R/H HORIZONTAL STAB. FRONT SPAR INTERNAL RIB 4 ;STEFFINER # 3 CRACKED @ LOWER RADIUS / [01] REMOVED DAMGAE AREA AT #4 RIB STEFFINER #3 AS REF. B737-700 SRM 55-10-09-2R-4;[02] VERIFIED STEP #1;[03] PERFORMED HFEC INSP ON REWORKED AREA IAW B737 NDT P6 51-00-00 PROC.23; 1 CRACK NOTED CRACK LENGTH .650'<BR>TOOL USED : NORTEC 600 B/C 166317 CALDUE: 10/22;[04] REMOVED DAMAGE (CRACK) AREA FROM RIB #4 WEB AS REF. B737-700 SRM 55-10-09-2R-4.;[05] PERFORMED HFEC INSP ON CUT OUT AREA. IAW B 737 NDT PART 6 51-00-00 PROCE 23. TOOL NORTEC 600. BC 166316. CALIB DUE 10-8-22. NO CRACKS FOUND.;[06] PERFORMED HFEC ROTO INSP ON 6EA FASTENER OPEN HOLES NEAR TO REWORKED AREA. IAW B 737 NDT PART 6 51-00-00 PROCE 16. TOOL NORTEC 600. BC 166316. CALIB DUE 10-8-22. NO CRACKS FOUND.;[07] LOCATED AND DRILLED NEW REPAIR PARTS (T-SECTION; ANGLE AND SHIMS) AS REF. B737-700 SRM 55-10-09-2R-4 AND 51-10-02-0G-0.;[08] VERIFIED STEP#4; AND #7.;[09] OK TO INSTALL REPAIR PARTS.;[10] INSTALLED REPAIR PARTS (T-SECTION; ANGLE AND SHIMS) AT #4 RIB STEFFINER #3 AS REF. B737-700 SRM 55-10-09-2R-4. PENDING FILLET SEAL.;[11] VERIFIED PARTS INSTALLATION. (PENDING SEAL);[12] APPLIED FILLET SEAL TO REPAIR AS REF. B737-700 AMM 51-31-00-390-804;[13] VERIFIED WORK ACCOMPLISHED.

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