# SDR SWAA2021120141291

- 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/SWAA2021120141291

## Discrepancy

LT HORIZONTAL STAB HSS 120.3 RIB 4; 3RD VERTICAL STIFFENER CRACKED.  REMOVED LEFT HAND HORIZONTAL STAB INSPAR RIB TO ACCESS REPAIR IAW SRM 51-40-02-0G-0.  CUT AND 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. ONE CRACK FOUND IN FASTENER COMMON THE 3RD STIFFENER.   CUT AND REMOVED CRACK AROUND ONE FASTENER HOLE COMMON TO THE STIFFENER IAW SRM 55-10-09-2R-5 STEP 4.C.  HFEC INSPECTED CUT EDGE IAW NDTM PART 6 51-00-00 PROCEDURE 23; NO CRACKS NOTED.  FABRICATED REPAIR T-SECTION,  ANGLE, FILLER ,AND SHIMS  IAW SRM 55-10-09-2R-5 STEP 4 G-K. REINSTALLED THE RIB IAW SRM 51-40-02-0G-0 AND DWGS 002A0001; 182A3001, AND 182A1500.

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