# SDR ASAA201904249119

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 22, 2019
- Submitted: April 24, 2019
- Operation: Air carrier
- Aircraft: [N594AS](https://openairdocs.org/aircraft/N594AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35191
- Aircraft time: 42,170 hours, 12,633 cycles
- System (JASC): [3420 · Attitude and Direction Data System](https://openairdocs.org/jasc/3420)
- Part: Adiru
- Part number: HG2050AC11
- Part serial: 56056367
- Condition: Failed
- Location: Nr 1
- Part time: 23,433 hours, 7,206 cycles
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA201904249119

## Discrepancy

LOSS OF ALL HEADING INFO ON CAPTAIN'S SIDE DISPLAYS. GROUNDED - YES. DIVERSION TIME 38 MINUTES. #1 IRU LOGGED 34-21009 ENTER HEADING, DFCS FAULT REVIEW LOGGED 5 ADIRU #1 DATA INVALID FAULTS LAST LEG. R/R #1 ADIRU PERB737-800 AMM 34-21-01. SYS OPS CKS NML PER SAME AND DFCS LAND VERIFY 'PASS'.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.