# SDR SWAA2021111825834
- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 2, 2021
- Submitted: November 18, 2021
- Operation: Air carrier
- Aircraft: N786SW
- Make and model: Boeing 737*
- Aircraft serial: 29811
- Aircraft time: 68,452 hours, 40,246 cycles
- System (JASC): [5511 ยท Horizontal Stabilizer, Spar/Rib](https://openairdocs.org/jasc/5511)
- Part: None
- 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/SWAA2021111825834
## Discrepancy
R/H HORIZONTAL STABILIZER RIB 4 AT STAB. STA-120.30; STIFFENER 3 CRACKED. ; / [01] REMOVED DAMAGE AT RH H.S. RIB #4 STIFFENER #3 AS PER B737-7 SRM 51-10-02-0G-0.; [02] VERIFIED STEP 1.REQUIRED NDT; [03] PERFORMED HFEC INSP. ON RIB#4 STIFFENER #3 ON THE WEB IAW B737 NDT PART 6; 51-00-00; PROCEDURE 23. CRACK REMAINED AND MARK
TOOL: NORTEC 600 B/C: 16316 DUE: 10/08/22; [04] REMOVED CRACK AT RH H.S RIB WEB (STIFFENER #3) AS PER B737-7 SRM 51-10-02-0G-0; [05] VERIFIED STEP 3-4; [06] PERFORMED HFEC INSP. OF THE CUT EDGES ON RIB#4; STIFFENER #3 AND WEB IAW B737 NDT PART 6; 51-00-00; PROCEDURE 23. NO CRACKS NOTED
TOOL: NORTEC 600 B/C: 16316 DUE: 10/08/22; [07] PERFORMED HFEC ROTO INSP. OF ALL EXISTING FASTENER HOLES WITHIN THE REPAIR AREA ON RIB#4; STIFFENER #4 IAW B737 NDT PART 6; 51-00-00; PROCEDURE 16. NO CRACKS NOTED
TOOL: NORTEC 600 B/C: 16316 DUE: 10/08/22
TOOL: OLYMPUS MINIMITE B/C: 160006 DUE: 01/18/22; [08] LOCATED AND DRILLED RIB AND REPAIR PARTS AS PER B737-700 SRM 51-40-05-0G-0; [09] VERIFIED STEP 8; OK TO TREAT AND PRIME HOLES; [10] TREATED AND PRIMED HOLES AS PER B737-700 AMM 51-21-41-370-803 AND AMM 51-21-72-370-804; [11] VERIFIED STEP 10. OK TO INSTALL REPAIR PARTS; [12] INSTALLED REPAIR PARTS AS PER B737-700 SRM 51-40-02-0G-0 AND SRM 55-10-09-2R-4 REPAIR 4.; [13] APPLIED FILLET SEAL AROUND REPAIR PARTS AS PER B737-700 SOPM 20-50-19
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