# SDR CALA2026030914402

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 2, 2026
- Submitted: March 9, 2026
- Operation: Air carrier
- Aircraft: [N37437](https://openairdocs.org/aircraft/N37437), registered now
- Make and model: Boeing 737924ER
- Aircraft serial: 33532
- Aircraft time: 51,947 hours, 18,550 cycles
- System (JASC): [5310 · Fuselage Main, Structure](https://openairdocs.org/jasc/5310)
- Part: Structure
- Part number: 147A8540T30
- Condition: Corroded
- Location: Zone 200
- 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/CALA2026030914402

## Discrepancy

R2 DOOR CUTOUT AREA, INNER CHORD HAS CORROSION ON UPPER SURFACE BETEWEEN BS 947 TO 986.5 APPROX. RBL-56.  REMOVED AND REPLACED INNER CHORD AT R2 DOOR CUTOUT AREA BETWEEN BS947 TO 986.5 RBL56 PART NUMBER 147A8540Y3D PO NO. 1140348.18 IAW B737-900 SRM 51-40-02 AND BOEING DRAWING 147A8501 REV:-

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