# SDR USAAD99099

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 19, 1999
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N829US
- 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: 49429
- System (JASC): [2450 · AC Power Distribution System](https://openairdocs.org/jasc/2450)
- Part: Relay
- Part number: HDX9F011
- Condition: Failed
- Location: Ac Power Dist
- Stage of operation: CL
- Nature of condition: O
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/USAAD99099

## Discrepancy

PIT/MSY - FLT 474 - AFTER TAKEOFF IT WAS NOTED THERE WERE NO CABIN LIGHTS OR LAVATORY LIGHTS.  THE TOILETS DID NOT FLUSH, THE NR 4 TR INDICATED ZERO, AND THE BATTERY CHARGER WAS INOPERATIVE.  THE AIRCRAFT RETURNED TO THE FIELD AND LANDED WITHOUT INCIDENT.  MAINTENANCE REPLACED THE GROUND SERVICE BUSS TRANSFER RELAY (R2-50), AND THE GROUND CONTROL RELAY (R2-48).  (X)

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