# SDR ASAA2020032032475

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 18, 2020
- Submitted: March 20, 2020
- Operation: Air carrier
- Aircraft: [N513AS](https://openairdocs.org/aircraft/N513AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35192
- Aircraft time: 43,826 hours, 12,995 cycles
- System (JASC): [2421 · AC Generator-Alternator](https://openairdocs.org/jasc/2421)
- Part: Idg
- Part number: 761574B
- Part serial: 1730
- Condition: Faulty
- Location: Nr 1 Engine
- Part time: 36,177 hours, 11,790 cycles
- Stage of operation: CR
- 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/ASAA2020032032475

## Discrepancy

AT FL400FL GEN 1 SOURCE LIGHT OFF BUS BUS AND DRIVE ILLUMINATED. RAN SOURCE OFF THEN DRIVE OFF QRH, DISCONNECTED GEN 1 VIA SWITCH, STARTED APU AND PUT IT ON BUS. GROUNDED - YES. FOUND #I ENG IDG DPI EXTENDED. WHILE PERFORMING DPI CHECK REF 12-13-21-200-802. FOUND FERROUS PARTICLES MEASURING ABOUT 1/4 X 3/32ND IN SCAVENGE/CHARGE FILTER. #1 ENG IDG NEEDS TO BE REPLACED PER B737-800 AMM TASK 12-13-21-200-802 (G) TABLE 301.ACCOMPLISHED ALT DEACTIVATION PROCEDURES PER CH5 TABLE 3. PARTS VERIFICATION. REMOVED & REPLACED #1 ENG IDG.

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