# SDR AALA202111294268

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 17, 2021
- Submitted: November 29, 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): [5310 · Fuselage Main, Structure](https://openairdocs.org/jasc/5310)
- Part: Angle
- Part number: 147A5710U1
- 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/AALA202111294268

## Discrepancy

AIRCRAFT IN BASE MAINTENANCE: CORROSION OF Z ANGLE AT STA 992 AND STR 17L BETWEEN LBL 37 AND LBL 44, MEASURING L=1.0 IN, W=1.0 IN, D=0.025 IN. REPLACED Z ANGLE WITH NEW IAW AARD 51-00-05-1, DRAWING #147A5700, AND SRM 51-40-02.

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