# SDR 2000ZZZX110

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 14, 1999
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: [N87SF](https://openairdocs.org/aircraft/N87SF), registered now
- Make and model: Cessna 550
- Registry model: [Cessna 550](https://openairdocs.org/model/cessna-550) (OpenAirDocs)
- Aircraft serial: 5500096
- System (JASC): [5510 · Horizontal Stabilizer Structure](https://openairdocs.org/jasc/5510)
- Part: Structure
- Condition: Misdrilled
- Location: Horiz Stabilizer
- Part time: 9,856 hours
- Component: 55320002
- Stage of operation: IN
- Nature of condition: W
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2000ZZZX110

## Discrepancy

DURING COURSE OF 10,000-HOUR INSPECTION, THE HORIZONTAL STABILIZER WAS FOUND TO HAVE NUMEROUS DOUBLE HOLES, HOLES DRILLED OFF-CENTER, HOLES DRILLED ON AN ANGLE AFTER REMOVAL OF THE HYLOCKS IN THE CENTER SECTION THROUGH ALL SPARS AND FITTINGS.  SUBMITTER STATED IT IS VERY OBVIOUS A MANUFACTURING PROBLEM.

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