# SDR CALA2023040301012

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 3, 2023
- Submitted: April 3, 2023
- Operation: Air carrier
- Aircraft: [N25705](https://openairdocs.org/aircraft/N25705), registered now
- Make and model: Boeing 737
- Aircraft serial: 28766
- Aircraft time: 77,491 hours, 27,915 cycles
- System (JASC): [5500 · Empennage Structure](https://openairdocs.org/jasc/5500)
- Part: Skin
- Part number: NA
- Condition: Cracked
- Location: Sta129.50 I/B
- Stage of operation: IN
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2023040301012

## Discrepancy

R/H HORIZONTAL STAB LOWER SKIN HAS A 0.750 CRACK LOCAQTED AT ATAB STA 129.50 I/B RIVET ROW 19.00 FROM FRUNT SPAR REF NDTM UAL PART 6 SECTION 55-10-01 REF AAR N/R 974677 REMOVED EXISTING REPAIR BETWEEN STAB STA 138.7 AND 147.9 COTOUT DAMAGED AREA STA 129.5 19IN FROM FRONT SPAR AND INSTALLED NEW DOUBLER SIZE 16X28 ACTUAL STAB STA 124 STA 152 REF B737 SRM 55-10-01-2R-11 REPAIR 11 THIS IS A CAT B REPAIR INSP THRESHOLD

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