# SDR SWAA2021120141292

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 5, 2021
- Submitted: December 1, 2021
- Operation: Air carrier
- Aircraft: [N7862A](https://openairdocs.org/aircraft/N7862A), registered now
- Make and model: Boeing 737-79P
- Registry model: [Boeing 737-79P](https://openairdocs.org/model/boeing-737-79p) (OpenAirDocs)
- Aircraft serial: 33009
- Aircraft time: 48,858 hours, 32,792 cycles
- System (JASC): [5510 · Horizontal Stabilizer Structure](https://openairdocs.org/jasc/5510)
- Part: Stiffener
- Condition: Cracked
- Location: L/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/SWAA2021120141292

## Discrepancy

LT HORIZONTAL STAB HSS 120.3, RIB 4, 4TH VERTICAL STIFFENER WAS CRACKED.  CUT & REMOVED CRACK DAMAGE ON VERTICAL STIFFENER IAW SRM 55-10-09-2R-4 STEP 4.B.  HFEC INSPECTED OPEN HOLES IAW NDTM PART 6 51-00-00 PROCEDURE 16. NO CRACKS NOTED.   HFEC INSPECTED CUT OUT IAW NDTM PART 6, 51-00-00 PROCEDURE 23.   NO CRACKS NOTED.   FABRICATED REPAIR T-SECTION,  ANGLE, AND SHIMS IAW SRM 55-10-09-2R-4. STEP 4. F - J.  APPLIED CHEMICAL CONVERSION COATING TO REPAIR, BARE SURFACES & EDGES OF RIB IAW SRM 55-10-09-2R-4. STEP 4.K.  APPLIED PRIMER TO REPAIR,  BARE SURFACES, & EDGES OF RIB IAW SRM 55-10-09-2R-4 STEP 4.L.  INSTALLED THE REPAIR & APPLIED FILLET SEAL IAW SRM 55-10-09-2R-4 STEP 4.M - Q.

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