# SDR AALA202208236265

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 17, 2022
- Submitted: August 23, 2022
- Operation: Air carrier
- Aircraft: [N709UW](https://openairdocs.org/aircraft/N709UW), registered now
- Make and model: Airbus A319-112
- Registry model: [Airbus A319-112](https://openairdocs.org/model/airbus-industrie-a319-112) (OpenAirDocs)
- Aircraft serial: 997
- Aircraft time: 61,552 hours, 35,820 cycles
- System (JASC): [7930 · Engine Oil Indicating System](https://openairdocs.org/jasc/7930)
- Part: Sdac
- Part number: 350E5500202
- Part serial: 0E5005193
- Condition: Defective
- Location: Zone 100 - Fuse
- Part time: 57,545 hours, 28,453 cycles
- Stage of operation: CR
- How discovered: V
- Nature of condition: J
- Precautionary procedure: A, O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202208236265

## Discrepancy

AIRCRAFT WAS GROUNDED: BOTH LEFT AND RIGHT ENGINES WENT TO LOW OIL QUANTITY AND NO PRESSURE AT CRUISE. AN EMERGENCY WAS DECLARED AND THE AIRCRAFT DIVERTED TO TUL WHERE IT LANDED SAFELY WITHOUT FURTHER INCIDENT. **SUPPLEMENTAL REPORT FOR AALA202208196265: THE DAT FROM THE DFDR WAS DOWNLOADED AND CONFIRMED THAT THE OIL QUANTITY AND OIL PRESSURE WAS WITHIN LIMITS ON BOTH ENGINES. MAINTENANCE ACCOMPLISHED HIGH POWER ENGINE RUNS WITH NO LEAKS NOTED AND ALL INDICATIONS WERE NORMAL. SINCE THE EVENT OCCURRED ON BOTH ENGINES IT WAS SUSPECTED THAT THE ISSUE MAY BE RELATED TO THE SYSTEM DATA ACQUISITION CONCENTRATOR (SDAC). A REVIEW OF AIRMAN REVEALED THAT THE #1 SDAC HAD FAULTS ON THE LAST FLIGHT LEG. MAINTENACE REPLACED THE #1 SDAC PER AMM 31-55-34. MAINTENANCE ALSO ACCOMPLISHED TSM 73-29-00-810-825-A AND FOUND THE #1 ENGINE ELECTRONIC CONTROL UNIT (ECU) HAD A FAULT MESSAGE AND WAS REPLACED PER AMM 73-21-60. (AALA202208234437) A SATISFACTORY OPERATIONAL CHECK AND FUNCTIONAL CHECK FLIGHT WAS ACCOMPLISHED WITH NO DEFECT BEING NOTED. ** (CLOSED)

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