# SDR SCNA20260508190

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 30, 2026
- Submitted: May 8, 2026
- Operation: Air carrier
- Aircraft: [N843SY](https://openairdocs.org/aircraft/N843SY), registered now
- Make and model: Boeing 737-800
- Registry model: [Boeing 737-800](https://openairdocs.org/model/boeing-737-800) (OpenAirDocs)
- Aircraft serial: 40721
- Aircraft time: 39,856 hours, 26,318 cycles
- System (JASC): [5512 · Horizontal Stabilizer, Plate/Skin](https://openairdocs.org/jasc/5512)
- Part: Skin
- Condition: Cracked
- Location: Zone 300
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SCNA20260508190

## Discrepancy

WO 104124 NR00018: SUSPECTED CRACK ON R/H HORIZONTAL STAB. LOWER SKIN AT STAB STA 120.3 RIB 9" AFT OF FORWARD SPAR. VERIFIED WITH HFEC - - PERFORMED HFEC SURFACE INSPECTION OF SUSPECTED CRACK AT RH LOWER HORIZONTAL SKIN STA. 120.3 RIB 9" AFT OF FWD. SPAR REF. 737 NDT PART 6 51-00-00, PROC. 23.  FOUND CRACK INDICATION.  REMOVED EXISTING FASTENERSIN REPAIR AREA , CUT OUT DAMAGED AREA IN ACORDENANCE WITH SRM 55-10-01-2R-11 REPAIR 11. REQUIRES HFEC  PER SRM 55-10-01-2R-11 STEP 4D1. ALL WORK PERFORMED BY AVIATION FUEL SYSTEMS REPAIR, INC. IN WO 2600R800  PERFORMED HFEC INSPECTION OF CUTOUT.  NO CRACKS NOTED.  REF. B737 NDT MANUAL PART 6 51-00-00 PROCEDURE 23.  PERFORMED HFEC OPEN HOLE INSPECTION OF REMOVED FASTENER HOLES.  NO CRACKS NOTED.  REF. B737 NDT MANUAL PART 6 51-00-00 PROCEDURE 16.  RII OF REPAIR COMPLETE.  THIS IS A CAT B REPAIR AND WILL REQUIRE AN MTI REF. SRM 55-10-01-2R-11 TABLE 204.

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