# SDR SWIA200210763

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 28, 2002
- Submitted: April 5, 2002
- Operation: Air carrier
- Aircraft: N271YV
- Make and model: Emb EMB-120ER
- Registry model: [EMB EMB-120ER](https://openairdocs.org/model/embraer-emb-120er) (OpenAirDocs)
- Aircraft serial: 120271
- Aircraft time: 21,382 hours, 29,037 cycles
- System (JASC): [3452 · ATC Transponder System](https://openairdocs.org/jasc/3452)
- Part: Transponder
- Condition: Malfunctioned
- Location: E/E Bay
- 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/SWIA200210763

## Discrepancy

AFTER TAKEOFF, TRANSPONDER NR 1 REPORTED DIAG WITH NO ASSOCIATED NUMBER.  ATC REPORTED NO ALTITUDE READOUT.  SWITCHED TO NR 2 TRANSPONDER AND HAD NO REPLY LIGHT OR ALT INFORMATION AS REPORTED BY ATC.  RETURNED TO PDX.  RERACKED NR 1 TDR94 TRANSPONDER.  INSPECTED CONNECTIONS.  NO DEFECTS NOTED.  OPS CHECKED NR 1 TRANSPONDER OK.  REMOVED NR 2 TDR94 AND CAD62 AND CLEANED CONNECTIONS.  OPS CHECKED SYSTEM.  SYSTEM TESTS GOOD.

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