ALTITUDE DIGITIZER (P/N do-138) - As Removed, Serviceable
P/N: do-138
Category: Flight Instruments
This product requires a custom quote. Please contact our sales team for pricing information or submit an RFQ (Request for Quote).
Available Inventory
| Condition | Stock |
|---|---|
| As Removed | 1 Available |
| Serviceable | 1 Available |
Product Description
The do-138 altitude digitizer converts barometric pressure signals from the aircraft static system into encoded altitude data for Mode C/S transponders. This unit outputs parallel Gray code (Gillham) or serial format data with FAA TSO-C88a approval. Installed between the static port and transponder, it enables accurate pressure altitude reporting required for air traffic control surveillance.
Installation and testing must follow the transponder's STC/TSO documentation and your aircraft's maintenance manual for proper system integration.
Please note: Product descriptions are provided for informational purposes. Always refer to your aircraft's Illustrated Parts Catalog (IPC) to verify part compatibility and specifications.
Frequently Asked Questions
What is the ALTITUDE DIGITIZER (P/N do-138)?
The do-138 altitude digitizer converts barometric pressure signals from the aircraft static system into encoded altitude data for Mode C/S transponders. This unit outputs parallel Gray code (Gillham) or serial format data with FAA TSO-C88a approval.
Is the do-138 calibrated and ready to install?
Calibration status depends on the condition. Overhauled instruments come fully calibrated with an 8130-3 tag. The ALTITUDE DIGITIZER is available in: As Removed, Serviceable. Contact us to confirm calibration status for your selected condition.
Can the do-138 be used as a direct replacement in my aircraft?
The ALTITUDE DIGITIZER is designed as a form-fit-function replacement. Verify the part number against your aircraft's Illustrated Parts Catalog (IPC) and instrument panel layout to confirm compatibility before ordering.
Do you offer instrument exchange programs for the do-138?
Yes, we offer core exchange programs on select instruments. Send your unserviceable unit and receive a discount on the replacement. Call (904) 998-9101 or submit an RFQ to check exchange availability for the do-138.
Related Flight Instruments
- INSTRUMENT PANEL DIMMER – P/N 31960-002
- AIRSPEED INDICATOR – P/N 5804056-5
- RMI. GY. 5,BL/WH. – P/N 622-2506-006
- TUBE PITOT – P/N 0813177-2
- CHRONOMETER – P/N M800
- ALTIMETER – P/N a-35-ma-10-l-1
- COMPASS – P/N c-2400-l4p-b
- TURN COORDINATOR – P/N 303640-014
- ALTIMETER/PRESELECT, BLACK, TCAS – P/N 622-9238-041
- DIRECTIONAL GYRO – P/N 289-5m3
- PITOT TUBE LH – P/N ph1100-1-l
- AIRSPEED INDICATOR KM/H – P/N 110-11