# SDR DALA2025022401440

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 22, 2025
- Submitted: February 24, 2025
- Operation: Air carrier
- Aircraft: [N534DT](https://openairdocs.org/aircraft/N534DT), registered now
- Make and model: Airbus A321-271NX
- Registry model: [Airbus A321-271NX](https://openairdocs.org/model/airbus-s-a-s-a321-271nx) (OpenAirDocs)
- Aircraft serial: 11357
- Aircraft time: 7,620 hours, 1,862 cycles
- System (JASC): [4900 · Airborne Auxiliary Power Unit (APU) System](https://openairdocs.org/jasc/4900)
- Part: Control Valve
- Condition: Faulted
- Location: Apu
- Stage of operation: TX
- How discovered: O
- Nature of condition: B
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DALA2025022401440

## Discrepancy

SHIP 5034 "NO GO" ODI PREVENTION - DRIVER DO NOT DISPATCH THE AIRCRAFT" - W/O MCC APPROVAL" - FUEL SMELL ON APU START.   PERFOMED A VISUAL INSPECTION OF APU COMPARTMENT AND INTAKE WITH NTF. REF A321 AMM 49-00. REMOVED AND RE-INSTALLED APU LOAD CONTROL VALVE REF A321 AMM 49-51-51WITH NO SIGNS OR SMELL OF FUEL. INSPECTED L/H PACK BAY WITH NO DEFECTS NOTED REF A321 AMM 36-12. NO FUEL SMELL FROM AUX FUEL TANK. DUPLICATED ENG SHUTDOWN WITH APU BLEED TURNED ON WITH NO FUEL SMELL. C/W NO GO ODI PREVENTION SMOKE/FUMES. PERFOMED LEVEL A DECONTAMINATION REF A321 WORKCARD 2100-2007. MCC INSTUCTIONS C/W (0823098)

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