# SDR 97ZZZM182

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 9, 1997
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N494US
- Make and model: Fokker F.28 MK4000
- Registry model: [Fokker F.28 MK4000](https://openairdocs.org/model/fokker-f-28-mk4000) (OpenAirDocs)
- Aircraft serial: 11167
- System (JASC): [3431 · Localizer/VOR System](https://openairdocs.org/jasc/3431)
- Part: Vor/Ils Receiver
- Part number: 20412343422
- Condition: Malfunctioned
- Location: E/E Compt
- Stage of operation: AP
- Nature of condition: O
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/97ZZZM182

## Discrepancy

FLT 872 - TRI-CLT - EN ROUTE TO CLT, BOTH ILW WERE UNRELIABLE AS WELL AS BOTH VOR NAVS.  WEATHER HAD DETERIORATED IN CLT SO CREW DECIDED TO RETURN TO TRI.  FLIGHT LANDED AT TRI WITHOUT FURTHER INCIDENT.  MAINTENANCE REPLACED NR 2 HSI, LEFT AND RIGHT NAV RECEIVERS, AND LEFT AND RIGHT NAV CONTROL HEADS.  REFERENCE USAAF97001

---
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.