# SDR F3LA2018101800456

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 14, 2018
- Submitted: October 18, 2018
- Operation: Air carrier
- Aircraft: N210FR
- Make and model: Airbus A320-214
- Registry model: [Airbus A320-214](https://openairdocs.org/model/airbus-a320-214) (OpenAirDocs)
- Aircraft serial: 4668
- Aircraft time: 27,958 hours, 11,412 cycles
- System (JASC): [3441 · Inertial Guidance System](https://openairdocs.org/jasc/3441)
- Part: Adiru
- Condition: Malfunctioned
- Stage of operation: TO
- How discovered: O
- Nature of condition: O
- Precautionary procedure: C
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/F3LA2018101800456

## Discrepancy

NAV IAS DISCREPANCY. FO'S IAS SHOWED 30% LESS SPEED THAN CAPT'S AND STANDBY IAS DISPLAYED. DEFERRED ADR2 PER MEL 34-10-01I CONTROL 1143664, DUE DATE 10/24/2018. 
SWAPPED ADIRU 1 AND 2, FAULT CLEARED. ADIRU 1, 2, AND 3 TESTED GOOD IAW AMM 34-12-34 PB 401 OPS CHECK GOOD. MEL CLEARED.

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