# SDR AALA202110191454

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 15, 2021
- Submitted: October 20, 2021
- Operation: Air carrier
- Aircraft: [N979NN](https://openairdocs.org/aircraft/N979NN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 31228
- Aircraft time: 17,881 hours, 7,307 cycles
- System (JASC): [5310 · Fuselage Main, Structure](https://openairdocs.org/jasc/5310)
- Part: None
- Part number: 143A524035
- Condition: Cracked
- Location: Zone 100 - Fuse
- 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/AALA202110191454

## Discrepancy

AIRCRAFT IN BASE MAINTENANCE: CRACK IN MAIN CABIN FLOOR BREAK ASSEMBLY AT STA 540 BETWEEN LBL 24 AND RBL 24, MEASURING L=1.0 IN. REPLACED BREAK ASSEMBLY WITH NEW IAW B737-NG SRM 51-40-02-OG AND 51-40-05-OG.

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