# SDR AALA202112010658

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 17, 2021
- Submitted: December 1, 2021
- Operation: Air carrier
- Aircraft: [N820NN](https://openairdocs.org/aircraft/N820NN), registered now
- Make and model: Boeing 737*
- Aircraft serial: 29559
- Aircraft time: 35,481 hours, 14,474 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Intercostal
- Part number: 147A5660U22
- Condition: Corroded
- 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/AALA202112010658

## Discrepancy

AIRCRAFT IN BASE MAINTENANCE: CORROSION ON CABIN FLOOR SUPPORT INTERCOSTAL BETWEEN BS 947 AND BS 967 AT RBL 48. REPLACED FLOOR SUPPORT PER SRM 53-70-51-1A-1 AND AARD 51-00-05-1.

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