# SDR ASAA2023062643781

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 26, 2023
- Submitted: June 30, 2023
- Operation: Air carrier
- Aircraft: [N564AS](https://openairdocs.org/aircraft/N564AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35103
- Aircraft time: 61,123 hours, 18,176 cycles
- System (JASC): [8000 · Engine Starting System](https://openairdocs.org/jasc/8000)
- Part: Switch
- Part number: 66002849
- Condition: Faulty
- Location: Flight Compartme
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2023062643781

## Discrepancy

#2 ENG SHORT TIME FAULT MSG 73-30312 THE START SWITCH SIGNAL AND ARINC BUS DATA DISAGREE. GROUNDED - YES. REMOVED AND REPLACED #2 ENG START SWITCH REF MM 80-11-00. PERFORMED EEC TEST AND NO FAULTS, TEST PASS REF MM 73-21-00. PERFORMED START SWITCH TEST REF MM 80-11-00-730-801-F00, OPS TEST PASS. EEC BITE TEST RECENT FAULTS NO FAULT FOR LEG 0. THIS CLEARS PLT DEFERRAL.

---
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.