# SDR ASAA2021042434645

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 24, 2021
- Submitted: April 26, 2021
- Operation: Air carrier
- Aircraft: [N596AS](https://openairdocs.org/aircraft/N596AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35688
- Aircraft time: 46,890 hours, 13,993 cycles
- System (JASC): [2421 · AC Generator-Alternator](https://openairdocs.org/jasc/2421)
- Part: Idg
- Part number: 761574B
- Part serial: 1519
- Condition: Failed
- Location: Nr 1 Generator
- Part time: 65,470 hours, 22,949 cycles
- Stage of operation: TX
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2021042434645

## Discrepancy

AFTER LANDING/WAITING FOR GATE IN KOA: #1 ENG GENERATOR SOURCE OFF AND GEN OFF BUS LIGHT ILLUMINATED. NO-(ZERO) VOLTS OR CYCLES INDICATED ON #1 GENERATOR. PER QRH - STARTED APU AND POWERED #1 SYSTEM W/ APU POWER. GROUNDED - YES. REMOVED AND REPLACED #1 ENGINE IDG PER B737-800 AMM 24-21-11. C/W IDG INSTALLATIONTEST, ETOPS GROUND VERIFICATION TEST SUCCESSFUL OPS TEST NORMAL PER AMM 24-11-00.

---
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.