# SDR DALA2025121209093

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 9, 2025
- Submitted: December 12, 2025
- Operation: Air carrier
- Aircraft: [N878DN](https://openairdocs.org/aircraft/N878DN), registered now
- Make and model: Boeing 737932ER
- Aircraft serial: 31989
- Aircraft time: 27,060 hours, 10,124 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Drain Line
- Condition: Corroded
- Location: Zone 100
- 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/DALA2025121209093

## Discrepancy

(LOG 1343243) DRAIN TUBE INTERCOSTAL BETWEEN STA 947 AND STA 967 AT LBL50 HAS DEEP CORROSION. REMOVED AND REPLACED DAMAGED INTERCOSTAL P/N 147A5660-21 FS 947- 967 LBL50 IAW B737-900 SRM 51-40-02.

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