# SDR SCNA20210212407

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 23, 2020
- Submitted: February 12, 2021
- Operation: Air carrier
- Aircraft: [N824SY](https://openairdocs.org/aircraft/N824SY), registered now
- Make and model: Boeing 737-85P
- Registry model: [Boeing 737-85P](https://openairdocs.org/model/boeing-737-85p) (OpenAirDocs)
- Aircraft serial: 33976
- Aircraft time: 42,918 hours, 25,912 cycles
- System (JASC): [2421 · AC Generator-Alternator](https://openairdocs.org/jasc/2421)
- Part: Idg
- Condition: Malfunctioned
- Location: Nr 2
- 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/SCNA20210212407

## Discrepancy

GEN OFF BUS LIGHT AND SOURCE OFF LIGHT ILLUMINTED AT CRUZE GEN WOULD NOT RESET. CREW FOLLOWED THE QRH, UNABLE TO RECONNECT GEN 2 TO THE TRANSFER BUS. DUE TO #2 GEN OFF LIGHT STARTED APU IN FLIGHT AT 37000 , AFTER 3 MINUTES APU INOP LIGHT ILLUMINTED AND APU DROPPED OFF LINE. DID NOT ATTEMPT RESTART. REPLACED #2 ENG IDG REF AMM 24-11-11 OPS CHECK GOOD LEAK CHECK GOOD. PERFORMED FIM 49-60 TASK 801 AND FOUND FAULT 49-91007 LOW OIL PRESSURE. PERFORMED FIM 49-90 TASK 803 AND NO CURRENT FAULTS APU STARTED NORMAL SEVERAL TIMES. REMOVED & REPLACED APU LOW OIL PRESSURE SWITCH. APU OPS CHECK GOOD. REF: AMM 49-94-22. OK FOR SERVICE

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