# SDR YENA2024010200003

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 29, 2023
- Submitted: January 2, 2024
- Operation: Air carrier
- Aircraft: [N527JL](https://openairdocs.org/aircraft/N527JL), registered now
- Make and model: Airbus A320-232
- Registry model: [Airbus A320-232](https://openairdocs.org/model/airbus-a320-232) (OpenAirDocs)
- Aircraft serial: 01557
- Aircraft time: 76,025 hours, 28,113 cycles
- System (JASC): [3400 · Navigation System](https://openairdocs.org/jasc/3400)
- Part: Adiru
- Part number: HG2030AE44
- Part serial: 02098309
- Condition: Failed
- Location: 1fp1
- Part time: 74,158 hours, 26,855 cycles
- Stage of operation: CL
- How discovered: V
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/YENA2024010200003

## Discrepancy

FLT#479, JFK-MBJ. (AIRCRAFT PERFORMED AN AIR TURN BACK AND DECLARED AN EMERGENCY) ' NAV 1 ADR FAULT 1 DURING FLIGHT. MADE AN EMERGENCY RETURN AND ACCOMPLISHED AN OVERWEIGHT LANDING. LANDING WEIGHT 157,000 TOUCH DOWN 250-300 FEET PER MIN. NO OVERSPEED. SMOOTH TOUCHDOWN; REF LOG PAGE 3845703 FOR CORRECTIVE ACTION . AC OKAY FOR SVC. REF TSM 34-53-31, UNABLE TO REPLICATE FAULT, REMOVED AND REPLACED ADIRU 1 AS A PRECAULTIONARY/T/SHOOTING IAW AMM TASK 34-12-34. BITE TEST ADR IAW AMM TASK 34-00-00 AND TEST IR IAW AMM TASK 34-14-00, ALL OPS CHECK NORMAL'

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