# SDR TWAA0005608

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 5, 2000
- Submitted: April 12, 2000
- Operation: Air carrier
- Aircraft: N989Z
- Make and model: Doug DC-9-31
- Registry model: [Doug DC-9-31](https://openairdocs.org/model/douglas-dc-9-31) (OpenAirDocs)
- Aircraft serial: 47135
- Aircraft time: 77,008 hours, 82,903 cycles
- System (JASC): [5712 · Wing, Rib/Bulkhead](https://openairdocs.org/jasc/5712)
- Part: Rib
- Condition: Cracked
- Location: Lt Wing
- 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/TWAA0005608

## Discrepancy

DURING OP 16 MAINT CHECK, FOUND LT WING L/E RIB APPROX 7 INCHES I/B OF NUMBER 11 SLAT TRACK WAS CRACKED AT LOWER AFT FASTENER, AND ANOTHER CRACK 19 INCHES /B OF NUMBER 11 SLAT TRACK AT LOWER AFT FASTENER.  REPAIRED PER SRM 57-02 FIG 6.

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