# SDR CALA2015083100718

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 28, 2015
- Submitted: August 31, 2015
- Operation: Air carrier
- Aircraft: [N87512](https://openairdocs.org/aircraft/N87512), registered now
- Make and model: Boeing 737824
- Aircraft serial: 33458
- Aircraft time: 24,728 hours, 8,612 cycles
- System (JASC): [5512 · Horizontal Stabilizer, Plate/Skin](https://openairdocs.org/jasc/5512)
- Part: Skin
- Part number: 182A4001
- Condition: Cracked
- Location: Lt Horiz Stab
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2015083100718

## Discrepancy

FOUND DURING C SCAN OF LT LOWER SKIN OF HORIZONTAL STAB, CRACK INDICATION AT STATION 129.50, BETWEEN RIVET 9 & 10, AS MEASURED FROM AFT SPAR.  CRACK LENGTH IS MEASURED 1 1/8 INCHES LONG.  CRACK IS MARKED IN RED GREASE PENCIL.  REPAIRED CRACK & INSTALLED REPAIR DOUBLER AT LT HORIZONTAL STAB LOWER SKIN, STATION 129.50 IAW SRM 55-10-01 REPAIR 11.  ALL PARTIAL WORK NOTED.  DIP ISSUED TO ACCOMPLISH BOTH DETAILED VISUAL & EXTERNAL LFEC INSPECTIONS, EVERY 9,000 FLIGHT CYCLES, WITH AN INSPECTION THRESHOLD OF 56,000 TOTAL COMPONENT FLIGHT CYCLES.  INSPECT AT THRESHOLD OF 56,000 TOTAL COMPONENT FLIGHT CYCLES & REPEAT AT INTERVALS OF EVERY 9000 FLIGHT CYCLES THEREAFTER.

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