# SDR AALA202110291231

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 8, 2021
- Submitted: October 29, 2021
- Operation: Air carrier
- Aircraft: [N899NN](https://openairdocs.org/aircraft/N899NN), registered now
- Make and model: Boeing 737*
- Aircraft serial: 31151
- Aircraft time: 27,656 hours, 11,405 cycles
- System (JASC): [5310 · Fuselage Main, Structure](https://openairdocs.org/jasc/5310)
- Part: Floor Support
- Part number: 143A524036
- 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/AALA202110291231

## Discrepancy

AIRCRAFT IN BASE MAINTENANCE: CRACK IN CABIN FLOOR SUPPORT AT STA 540 AND RBL 1. REPLACED FLOOR SUPPORT WITH NEW IAW AA B737NG SRM 51-40-02 AND 51-40-05 AND AMM 53-21-00.

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