# SDR SWAA2021091010655

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 24, 2021
- Submitted: September 10, 2021
- Operation: Air carrier
- Aircraft: N754SW
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 29849
- Aircraft time: 74,935 hours, 44,224 cycles
- System (JASC): [5511 · Horizontal Stabilizer, Spar/Rib](https://openairdocs.org/jasc/5511)
- Part: Rib
- Condition: Cracked
- Location: Horizontal 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/SWAA2021091010655

## Discrepancy

CRACK LEADING EDGE SKIN ACCESS PANEL 341B AT STA 95.96 AT RT HORIZONTAL STABILIZER (1 EA) ; 2021-368797 / [01] TOOK MEASURES OF CRACK RIB LEADING EDGE SKIN ACCESS PANEL 241B AT STA 95.96 RT HORIZONTAL STABILIZER MEASURES ARE: L:0.245 TOOL USED IS CALIPER P/N: 500-197-30 ; S/N: 15242824 DUE DATE: 17-JUN-22.; [02] REMOVED RIB LEADING EDGE SKIN ACCESS PANEL 341B AT STA 95.96 AT RT HORIZONTAL STABILIZER (1 EA) AND PERFORMED VISUAL INSPECTION AREA AND NOT FOUND MORE DAMAGE.; [03] COMPLETED STEP 1 AND 2; [04] EXACTLY LOCATION OF CRACK IS ON RIB STA 95.96 AT LEADING EDGE ACCESS PANEL 341B AT RT HORIZONTAL STABILIZER; [05] STEP 4 COMPLETED.; [06] PERFORMED DRILL ON NEW RIB STA 95.96 AT LEADING EDGE ACCESS PANEL 341B AT RT HORIZONTAL STABILIZER AND APPLIED PROTECTIVE TREATMENT ON HOLES IAW B737-700 SRM 51-40-05 AND SRM 51-20-01; [07] OK TO INSTALL NEW RIB AND FASTENER ON STA 95.96 AT LEADING EDGE ACCESS PANEL 341B AT RT HORIZONTAL STABILIZER GRANTED; [08] STEP 6 AND 7 COMPLETED; RII.<BR><BR>OK TO INSTALL GRANTED.; [09] INSTALLED NEW RIB AND FASTENER ON STA 95.96 AT LEADING EDGE ACCESS PANEL 341B AT RT HORIZONTAL STABILIZER IAW B737-700 SRM 51-40-02 ;SRM 51-10-02 ITEM 9 AND DWG 186A1001 REV: A; [10] STEP 9 COMPLETED RII; [11] REPLACED RIB ON STA 95.96 AT LEADING EDGE ACCESS PANEL 341B AT RT HORIZONTAL STABILIZER IAW B737-700 SRM 51-40-02 ;SRM 51-10-02 ITEM 9 AND DWG 186A1001 REV: A P/N USED 186A1352-6 PO 2021 184921 1; [12] JOB COMPLETED AS RII.

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