# SDR AALA202111199371

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 2, 2021
- Submitted: November 19, 2021
- Operation: Air carrier
- Aircraft: [N980NN](https://openairdocs.org/aircraft/N980NN), registered now
- Make and model: Boeing 737*
- Aircraft serial: 31229
- Aircraft time: 17,559 hours, 7,305 cycles
- System (JASC): [5314 · Fuselage Main, Keel](https://openairdocs.org/jasc/5314)
- Part: Stiffener
- 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/AALA202111199371

## Discrepancy

AIRCRAFT IN BASE MAINTENANCE: CRACK IN STIFFENER ON RH SIDE OF KEEL BEAM AT STA 663 AND STR 25R, MEASURING L=0.5 IN. ACCOMPLISHED PERMANENT REINFORCING DOUBLER REPAIR IAW SRM 57-10-10-2R-5 AND EA331764.

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