# SDR ASAA2012062792438

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 2, 2012
- Submitted: July 6, 2012
- Operation: Air carrier
- Aircraft: [N587AS](https://openairdocs.org/aircraft/N587AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35684
- Aircraft time: 17,843 hours, 5,341 cycles
- Engine: Cfmint CFM567B27
- System (JASC): [2421 · AC Generator-Alternator](https://openairdocs.org/jasc/2421)
- Part: Idg
- Condition: Failed
- Location: Nr 2 Generator
- Component: Generator
- Component part number: 761574B
- 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/ASAA2012062792438

## Discrepancy

NR 2 CSD DRIVE LIGHT ILLUMINATED WHILE AT GATE AND NR 1 CSD DRIVE LIGHT NOT ILLUMINATED.  CONFIRMED NR 1 ENGINE DRIVE LIGHT DOES NOT ILLUMINATE WITH ENGINE OFF.  LIGHT DOES PRESS TO TEST.  CHARGE PRESSURE SWITCH IN IDG IS READING OPEN THROUGH PINS 5/6 OF DP1206, SHOULD BE CLOSED.  VERFIED USING SRM 24-11-11 AND READING NR 2 IDG SWITCH STATUS, ITS CLOSED AS SHOULD BE.  REMOVED NR 1 IDG, INSTALLED SERVICEABLE IDG, OPS AND LEAK CHECKED GOOD REF MM 24-11-11, PB401.

---
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.