Collins TDR-90 ATC Transponder w
| Make | Collins |
|---|---|
| Model | TDR-90 ATC Transponder w |
| Condition | Used |
| Location | Goleta, CA , US |
| Date Listed | Aug 4, 2026 |
| Expires | Sep 3, 2026 |
Description
Collins TDR-90 ATC Transponder w — $65.
Specs
- Make / Model: Collins TDR-90 ATC Transponder w
- Condition: Used
- Location: Goleta, CA
Summary
Collins TDR-90 ATC Transponder Part Number: 622-1270-001Serial Number: 25793Mount: Collins UMT-11 Tray (included). Classic Collins ATC transponder (Mode A/C). GenuineCollins TDR-90 Mode A/C transponder removed from operational aircraftN258AS.
Description
Collins TDR-90 ATC Transponder Part Number: 622-1270-001 Serial Number: 25793 Mount: Collins UMT-11 Tray (included)
Genuine Collins TDR-90 Mode A/C transponder removed from operational aircraft N258AS. Shop verified “OPS TESTED Good Prior to Removal” with original yellow service tag. Clean unit with excellent connectors.
Key Features
Classic Collins ATC transponder (Mode A/C)
Includes matching factory UMT-11 mounting tray
Operationally tested good before removal
Clean and solid multi-pin connectors
One of the nicer TDR-90 units available
Compatibility
Commonly installed in 1970s–1990s general aviation and light turbine aircraft with Collins avionics stacks, including:
Cessna
Beechcraft
Piper
Many other GA aircraft
Usually paired with Collins CTL-92 control head. Important: Legacy transponder — verify compatibility with your wiring, control head, rack, and current ADS-B / 2020+ requirements before installation.
Condition
OPS Tested Good / Shop Stock
Removed from flying aircraft (N258AS)
Normal cosmetic wear only
30-Day Guarantee – Works as described or full refund (Seller pays return shipping)
What’s Included
Collins TDR-90 Transponder (622-1270-001, SN 25793)
Matching UMT-11 Mounting Tray
Shipping
Ships same or next business day from California, USA
Expert double-boxed avionics packaging
International shipping available via eBay Global Shipping Program
Notes Collins TDR-90, TDR90, 622-1270-001, Collins ATC Transponder, UMT-11 Tray, Collins Transponder with Mount, CTL-92, Pro Line Avionics, Aircraft Transponder.
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