# SDR USAAD00101

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 23, 2000
- Submitted: August 30, 2000
- Operation: Air carrier
- Aircraft: [N820US](https://openairdocs.org/aircraft/N820US), registered now
- 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: 49119
- System (JASC): [3454 · Visual Omnirange (VOR) System](https://openairdocs.org/jasc/3454)
- Part: Switch
- Part number: 001122101
- Condition: Failed
- Location: E/E Compt
- Part time: 49,314 hours
- Stage of operation: CL
- How discovered: O
- Nature of condition: O
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/USAAD00101

## Discrepancy

PHL-MCO - FLT 1127 - DURING CLIMB-OUT, THE CAPTAINS NAV CDI NEEDLE WAS INOPERATIVE.  SWITCHING THE RADIO SELECTOR TO BOTH ON 2 CDI DID NOT HELP.  THE RMI NEEDLE POINTED CORRECTLY AND THE DME WORKED.  THE AIRCRAFT RETURNED TO THE FIELD AND LANDED WITHOUT INCIDENT.  MAINTENANCE REPLACED THE NAC SWITCHING UNIT.  (M)

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