# SDR CALA2018071001593

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 25, 2018
- Submitted: July 13, 2018
- Operation: Air carrier
- Aircraft: N421UA
- Make and model: Airbus A320-232
- Registry model: [Airbus A320-232](https://openairdocs.org/model/airbus-a320-232) (OpenAirDocs)
- Aircraft serial: 500
- Aircraft time: 78,129 hours, 29,974 cycles
- System (JASC): [5322 · Fuselage Internal Mounting Structure](https://openairdocs.org/jasc/5322)
- Part: Shear Tie
- Part number: D5323038520001
- Condition: Corroded
- Location: Fuselage
- 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/CALA2018071001593

## Discrepancy

FORWARD CARGO COMPARTMENT FRAME 33 BETWEEN STRINGER 41 AND 42 LEFT SHEAR TIE CORRODED. BLENDED CORROSION ON SHEAR TIE AT FR33 STR41-42L NOMINAL THICKNESS .055" MATERIAL LOSS .006" REMAINING MATERIAL .049" ALLOWABLE LOSS .004", FOUND TO BE OUT OF LIMITS IAW SM ASNA3042. REMOVED AND REPLACED SHEAR TIE IAW SRM 51-72-11 PARA 2A3 & 4.

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