# SDR CALA2026021713845

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 16, 2026
- Submitted: February 18, 2026
- Operation: Air carrier
- Aircraft: [N37516](https://openairdocs.org/aircraft/N37516), registered now
- Make and model: Boeing 737924
- Aircraft serial: 43454
- Aircraft time: 17,408 hours, 5,775 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Drain
- Condition: Clogged
- Location: Zone 100
- Stage of operation: IN
- How discovered: V
- Nature of condition: B
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2026021713845

## Discrepancy

DURING WALK AROUND IT WAS NOTICED SMOKE COMING OUT FROM FUSELAGE CLOSE TO RT STAB,  PERFORMED INTERNAL VISUAL INSPECTION OF AFT UNPRESSURIZED AREA AND TAIL CONE AREA IAW AMM 05-41-03. NO HYDRAULIC LEAKS FOUND. FOUND TAIL CONE AREA DRAIN POINT TOTALLY CLOGGED AND FLUID ACCUMUL ATED ON THE AREA (COMBINATION OF WATER AND DE-ICING) REACHING APU EXHAUST DUCT. DRAIN WAS UNPLUGGED AND ALL FLUID DRAINED. AREA CLEANED. HYDRAULIC & APU OPS ACCOMPLISHED. NO HYDRAULIC LEAKS FOUND AND NO FLUID BURNING VAPORS NOTICED.

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