# SDR CALA2016082200552

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 19, 2016
- Submitted: August 22, 2016
- Operation: Air carrier
- Aircraft: [N77520](https://openairdocs.org/aircraft/N77520), registered now
- Make and model: Boeing 737824
- Aircraft serial: 31658
- Aircraft time: 20,800 hours, 7,015 cycles
- System (JASC): [5512 · Horizontal Stabilizer, Plate/Skin](https://openairdocs.org/jasc/5512)
- Part: Skin
- Part number: 182A4001
- Condition: Cracked
- Location: Rt 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/CALA2016082200552

## Discrepancy

CRACK FOUND AT RIGHT HORIZONTAL STABILIZER LOWER SKIN APPROXIMATELY 1" LONG LOCATED AT STA 101.90 12" FORWARD OF THE T/E, INBD OF FASTENER INBD ROW.  REPAIRED CRACK RT HORIZONTAL STABILIZER STA 101.90 12" AND 18" FWD OF T/E IAW SRM 55-10-01, REPAIR 11, FIGURE 204.  THIS IS A CAT B REPAIR WITH AN INSPECTION THRESHOLD OF 56, 000 TOTAL FLIGHT CYCLES AND AN INSPECTION INTERVAL OF 9,000 FLIGHT CYCLES TO INSPECT THE EXTERNAL DOUBLER, DVI, AND AMP; SKIN UNDER D INSPECTION THRESHOLD 56,000 TOTAL COMPONENT FLIGHT CYCLES WITH REPEAT INSPECTIONS THEREAFTER EVERY 9,000 FLIGHT CYCLES.

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