# SDR CALA2026090319224

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 25, 2026
- Submitted: September 3, 2026
- Operation: Air carrier
- Aircraft: [N489UA](https://openairdocs.org/aircraft/N489UA), registered now
- Make and model: Airbus A320-232
- Registry model: [Airbus A320-232](https://openairdocs.org/model/airbus-a320-232) (OpenAirDocs)
- Aircraft serial: 1702
- Aircraft time: 70,407 hours, 31,333 cycles
- Engine: Iae V2527A5
- System (JASC): [5730 · Wing, Plate/Skin](https://openairdocs.org/jasc/5730)
- Part: Skin
- Part number: R5704004958100
- Condition: Corroded
- Location: Zone 500
- 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/CALA2026090319224

## Discrepancy

DURING ZONAL INSPECTIONS OF THE LT WING IAW UAL TC 31-5721-1-2724, EXTENSIVE CORROSION DAMAGE WAS NOTED ON THE LT WING TOP SKIN PANEL NR 2 TRAILING EDGE OVERHANG AT RIBS 11-16.  DAMAGE CONSISTS OF EXFOLIATION BEYOND SRM ALLOWABLE DAMAGE LIMITS.  PERFORMED INTERIM REPAIR IAW ECRA 5721-01532. ACCOMPLISH A PERMANENT REPAIR ON THE LT WING TO LT UPPER SKIN BTWN RIBS 11-16 IAW  PART 3 OF THE LATEST REVISION OF ECRA 5721-01532 ON OR BEFORE 03-FEB-27.  ECRA 5721-01532 WAS CREATE FOR AS AN INTERIM SOLUTION FOR CORROSION ON THE LH WING TRAILING EDGE OVERHANG (TEOH) TOP SKIN PANEL 2 BETWEEN RIBS 11-16 MAJOR REPAIR.

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