# SDR CALA2024021200387

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 9, 2024
- Submitted: February 12, 2024
- Operation: Air carrier
- Aircraft: [N76504](https://openairdocs.org/aircraft/N76504), registered now
- Make and model: Boeing 737824
- Aircraft serial: 31604
- Aircraft time: 53,860 hours, 19,820 cycles
- System (JASC): [4900 · Airborne Auxiliary Power Unit (APU) System](https://openairdocs.org/jasc/4900)
- Part: Drain Mast
- Part number: 417A20937
- Condition: Missing
- Location: Apu
- Stage of operation: NR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2024021200387

## Discrepancy

RAMP FOUND ENTIRE AFT DRAIN MAST TO BE MISSING ORDERED P/N 417A2093-7 DRAIN MAST TO SMC OFFICE INSTALLED DRAIN MAST KIT M&E 29-2825-3-0031 REF. AMM 28-25-07-420-801. NEEDS PAINTED WITH RED SAFETY STIPES AND TEXT (SEE REF PICTURE). PARTS USED: 29-2825-3-0031,QTY :1 PAINTED STRIP AND STENCIL. APPLIED LEADING EDGE TAPE PER TRM ECRA 2800-01106.

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