# SDR UIEA2021040200796

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 1, 2021
- Submitted: April 2, 2021
- Operation: Air carrier
- Aircraft: [N492MC](https://openairdocs.org/aircraft/N492MC), registered now
- Make and model: Boeing 747-47UF
- Registry model: [Boeing 747-47UF](https://openairdocs.org/model/boeing-747-47uf) (OpenAirDocs)
- Aircraft serial: 29253
- Aircraft time: 93,536 hours, 16,163 cycles
- System (JASC): [5510 · Horizontal Stabilizer Structure](https://openairdocs.org/jasc/5510)
- Part: Torque Box
- Condition: Corroded
- Location: Horizontal 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/UIEA2021040200796

## Discrepancy

CORROSION - DAMAGE ON LH HST TORQUE BOX TOP SKIN PANEL UPPER SURFACT OUTBOARD OF STAB STA 165.64. STRINGER 3. REMOVE THE AFFECTED FASTENERS IAW SRM 51-40-02 REV 91. BLENDED OUT THE DAMAGE AREA IAW SRM 55-10-01 REV 91. PFM NDT INSP REFER TO JOB CARD ATTACHING SHEET NO 0263113 AND DATA SHEET NO 5615112-1. ACCOMPLISHED EI NO T2021A55M-676 REV 2. JOB COMPLETED AND CONDITION CHECK NORMAL.

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