Ferrer Aviation Services specialize in the repair of older, panel-mount transponders, such as the KING KT-76/78 and KT-76A/78A series, Narco AT-50/150 series, Bendix TR-661A, Collins TDR-950 and several others. Many shops refuse to work on older transponders and would rather you buy a new transponder from them. It has been our experience that many transponders can be brought back to life with a simple realignment to factory settings.

If you are not sure your transponder is working correctly, we offer a flat-rate service that won't break the bank.

• For $49, we will bench test your transponder and advise you of its condition.
  
  
• For $99, we will bench test your transponder and realign it to manufacturer's specifications (providing there is nothing else wrong) and issue an 8130 airworthiness approval tag.

  
  
• Encoder problems? We can test and adjust your encoder while evaluating your transponder for an additional $35.
  
  
• If your transponder requires parts or repairs, we will advise you of the cost and you can decide whether or not to have it repaired.

Before you send your transponder to any repair facility, make sure they are an FAA-certified Repair Station using calibrated test equipment. Only an approved repair station can issue an FAA form 8130-3 Airworthiness Approval Certificate.

We also buy non-working transponders. Please contact us and let us make an offer.

PLEASE NOTE: Call 817-422-2714 before sending us your transponder. We are a small shop (which means low overhead and low cost for you) but we do, occasionally, take vacations. Prices do not include shipping costs.

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