# SDR CALA2020020200278

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 25, 2020
- Submitted: February 2, 2020
- Operation: Air carrier
- Aircraft: [N24729](https://openairdocs.org/aircraft/N24729), registered now
- Make and model: Boeing 737724
- Aircraft serial: 28945
- Aircraft time: 66,834 hours, 23,476 cycles
- System (JASC): [5542 · Rudder, Plate/Skin](https://openairdocs.org/jasc/5542)
- Part: Skin
- Part number: 173A4001
- Condition: Cracked
- Location: Rudder
- 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/CALA2020020200278

## Discrepancy

RUDDER S/N 580336 L/H HAS 11"CRACK ON L/E AT THRUST FITTING LOCA TIONS. REF BY PEMCO NR 2664N1114 REMOVED DAMAGED AREA AND REPAIRED AREA IAW EA PD37-55-125, AMM 51-21-72-370-801 AND ECRA 5540-01557 PART 1, ACCOMPLISHED PART 3 OF ECRA 5540-01557 BY ADDING "-UALR" TO THE PART NUMBER ON THE DATA TAG. NO ADDITIONAL INSPECTIONS REQUIRED. REMOVED DAMAGED AREA AND REPAIRED AREA IAW EA PD37-55-125, AM 51-21-72-370-801 AND ECRA 5540-01557 PART 1, ACCOMPLISHED PAR 3 OF ECRA 5540-01557 BY ADDING "-UALR" TO THE PART NUMBER ON THE DATA TAG. NO ADDITIONAL INSPECTIONS REQUIRED.

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