# SDR AALA202106024403

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 6, 2021
- Submitted: June 2, 2021
- Operation: Air carrier
- Aircraft: [N535UW](https://openairdocs.org/aircraft/N535UW), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 3993
- Aircraft time: 41,174 hours, 14,845 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Support
- Part number: D5348004320601
- Condition: Corroded
- Location: Frames 66-68
- 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/AALA202106024403

## Discrepancy

AIRCRAFT IN BASE MAINTENANCE: CORROSION FOUND ON LOWER SILL LOCATED AT STA FR66 TO FR68 STR 23L. FR66 L= 1.533 INCHES, W= 1.391 INCHES, D= 0.040 INCHES FR68 L= 2.769 INCHES, W= 0.975 INCHES, D= 0.035 INCHES FR68 L= 1.884 INCHES, W= 1.135 INCHES, D= 0.031 INCHES. REPLACED LOWER SILL LOCATED AT STA FR66 TO FR68 STR 23L PER SRM 51-72-11-911-001.

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