# SDR AALA20110927DFW01

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 27, 2011
- Submitted: October 3, 2011
- Operation: Air carrier
- Aircraft: N7514A
- Make and model: Doug DC-9-82
- Registry model: [Doug DC-9-82](https://openairdocs.org/model/mcdonnell-douglas-dc-9-82) (OpenAirDocs)
- Aircraft serial: 49891
- Aircraft time: 62,326 hours, 32,448 cycles
- System (JASC): [2460 · DC Power Distribution System](https://openairdocs.org/jasc/2460)
- Part: Relay
- Condition: Inoperative
- Location: Electrical Sys
- Stage of operation: CL
- 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/AALA20110927DFW01

## Discrepancy

DFW - CREW REPORTED "DC BUS OFF" ANNUNCIATOR ILLUMINATED DURING CLIMBOUT.  FLIGHT RETURNED DFW LANDED WITHOUT INCIDENT.  AIRCRAFT REMOVED FROM SERVICE.  REPLACED DIRECT CURRENT EMERGENCY POWER TRANSFER RELAY R2-326.  SYSTEM GROUND CHECK NORMAL OPERATION.

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