# SDR 97UAL900296

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 4, 1997
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N769UA](https://openairdocs.org/aircraft/N769UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 26921
- Engine: Pwa PW4077
- System (JASC): [5754 · Leading Edge Devices](https://openairdocs.org/jasc/5754)
- Part: Slat
- Part number: 114W41608
- Condition: Cracked
- Location: Nr 9 Le Slat
- Stage of operation: IN
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/97UAL900296

## Discrepancy

LEADING EDGE SLAT NR 9 (114W4160-8) CENTER COVER PANEL HAS TWO CRACKS, 2 INCH AND 8 INCH.  INTERNALLY FOUND THREE ADDITIONAL CRACKS ON NOSE BEAM WEB 1 INCH TO 3 INCH IN LENGTH UNDER STIFFENERS BETWEEN OUTBOARD MAIN TRACK RIB ASSY AND O/B DEFLECTION CONTROL RIB ASSY.  PRELIMINARY FINDINGS INDICATE CRACKING APPEARS TO BE THE RESULT OF HIGH CYCLE SONIC FATIGUE.

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