# SDR AALA202107132142

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 28, 2021
- Submitted: July 13, 2021
- Operation: Air carrier
- Aircraft: [N842NN](https://openairdocs.org/aircraft/N842NN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 31099
- Aircraft time: 33,780 hours, 13,752 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Angle
- Part number: 147A57102
- Condition: Corroded
- Location: Zone 100
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202107132142

## Discrepancy

AIRCRAFT IN BASE MAINTENANCE: CORROSION OF Z-ANGLE AT STA 990 BETWEEN RBL 34 AND RBL 47, MEASURING L=0.25 IN, W=0.5 IN, D=0.04 IN. REPLACED Z-ANGLE WITH NEW IAW AARD 51-00-05-1.

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