# SDR CALA2026041715430

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 14, 2026
- Submitted: April 17, 2026
- Operation: Air carrier
- Aircraft: [N447UA](https://openairdocs.org/aircraft/N447UA), registered now
- Make and model: Airbus A320-232
- Registry model: [Airbus A320-232](https://openairdocs.org/model/airbus-a320-232) (OpenAirDocs)
- Aircraft serial: 836
- Aircraft time: 83,355 hours, 35,182 cycles
- System (JASC): [4990 · APU Oil System](https://openairdocs.org/jasc/4990)
- Part: Apu
- Condition: Oil Consumption
- Location: Zone 100
- Stage of operation: NR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2026041715430

## Discrepancy

LEVEL TWO CHRONIC, APU LOW OIL MESSAGE. INDICATION SYS HAS BEEN CONFIRMED TO BE OPERATING CORRECTLY. CURRENTLY APU IS CONSUMING ONE QUART EVERY 8 HOURS. REF TSM 49-00-00-810-979-A AND AMM 49-00-00-810-979. CHECK FOR LEAKS FROM APU DRAINS SUCH AS FUEL CONTOL, APU BLEED CONTROL VALVE OR IGV ACTUATOR. IF LEAKS ARE FOUND REPAIR SOURCE OF LEAK, IF DRAINS DO NOT SHOW EVIDENCE OF LEAKS REPLACE APU. THANKS! LARRY THOMSON DENLM.CARRIED BY ELB LOCKED FOR LEVEL TWO PERFORMED STATIC LEAK CHECK OF APU AFTER RUN FOR 30 MINS FOUND NO VISIBLE LEAKS OR EVIDENCE OF EXTERNAL LEAKS. ACCOMPLISHED LEAK CHECK WITH APU RUNNING / IN OPERATION. FOUND NO EXTERNAL LEAKS DURING RUN. REMOVED APU REF AMM  49-11-11-000-003-A. REMOVED APU REF AMM  49-11-11-000-003-A. ACP'D RII INSPECTION; APU FIRE WALL INSPECTION, (NON ROUTINES 8572110, 8572158 AND 9572225 TO ADDRESS DISCREPANCIES) .REF. GMM 09-25-05. ACP'D IDT INSPECTION; APU FIRE WALL INSPECTION, (NON ROUTINES 8572110, 8572158 AND 9572225 TO ADDRESS DISCREPANCIES) .REF. GMM 09-10-05. INSTALLED APU REF AMM 49-11-11-400-003-A TORQUED 3EA MOUNT NUTS.  ACP'D INSPECTION GMM 09-25-05 VERIFIED AND WITNESS APU MOUNTS TORQUED PER AMM 49-11-11. APU GENERATOR FEEDER CABLE INSTALLED AND NUTS TORQUED REF AMM 49-11-11-400-003-A. ACCOMPLISHED FULL INSTALLATION OF APU ALL HOOKUPS COMPLETED. REF AMM 49-11-11-400-003-A. INSPECTED VERIFIED FEEDER CABLE TORQUE OK INSPECTED VERIFIED SAFETY AND SECURITY AND LEAK CCOMPLIED WITH IN PREVIOUS UPDATES. OK FOR SERVICE.

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