# SDR CALA2019071801214

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 17, 2019
- Submitted: July 19, 2019
- Operation: Air carrier
- Aircraft: [N836UA](https://openairdocs.org/aircraft/N836UA), registered now
- Make and model: Airbus A319-131
- Registry model: [Airbus A319-131](https://openairdocs.org/model/airbus-industrie-a319-131) (OpenAirDocs)
- Aircraft serial: 1460
- Aircraft time: 58,763 hours, 25,407 cycles
- System (JASC): [3440 · Independent Position Determining System](https://openairdocs.org/jasc/3440)
- Part: Relay
- Part number: 14FP
- Condition: Failed
- Location: Dc Supply
- Stage of operation: TX
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2019071801214

## Discrepancy

INERTIAL REFERENCE (IR) 3 INOP - NAV. REQUEST MEL 3410C. MEL APPROVED BY TOMC PER 3410C, DDP C/W. PLACARD INSTALLED ITEM PLACE ON MEL. SLAVED IN ADIRU 3 REF MM 34-12-34, NO HELP, ORIGINAL REINSTALLED.  REF WDM 34-11-03 REPLACED RELAY 16FP, NO HELP. IR3 TEST SHOWS ADIRU 3 DC SUPPLY FAULT DURING IR SYS TEST, NEEDS MORE T-S. REPLACED RELAY 14FP REF TSM 34-14-08-810-901-A, AND ASM 34-11-01. OPS CHECK GOOD.

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