Sigma-Tek Factory Overhauled Directional Gyro 4000B-30

+$398 Core Exchange Charge
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Part# 10-03359
MFR Model# 1U262-001-39


Note: Additional core charge will be automatically added to the cart when you order this unit.

Factory-overhauled Directional Gyro 1U262-001-39 Model 4000B-30,that is like new and carry the same warranty as a new unit.

Provided installation is within 6 months of factory ship date, full replacement warranty is 12 months from date of installation.

Exchange core must be returned no later than 20 days from the invoice date to receive core credit.

Only like cores are accepted: Any 4000B series Sigma Tek core as exchange for a 4000B-30.
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Item arrived in two days. It was very well packaged and marked fragile. It was in like new condition and included the necessary paperwork.

Gary W
May 2, 2020


Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

Q: Can the Sigma-Tek Factory Overhauled DG's be mounted in a certified aircraft? If so, is there any issue with running it off a venturi?

This product is FAA approved and can be mounted in a certified aircraft. Per Sigma-Tek, while you can get it to work with off of a venturi and an inlet filter, they do not recommend this.

Q: Does this Sigma-Tek factory overhauled model 4000B-30 DG (part # 10-03359) have a 14v light?

No, the 4000B-30 is not a lit instrument.

Q: What is the core charge?

The core charge will automatically be added to the cart once this item is added to the shopping cart.

Q: Are these Sigma Tek 4000B gyros vacuum driven instruments?

Yes, this is a standard air-driven gyro.

Q: I routinely do aerobatics (Vans RV-8), involving Gs up to -1G to +4G. Is this an issue with this unit?

Per Sigma-Tek specifications the Maximum Acceleration is 1.5G's.

Q: How much is the core charge?

Current core charge is displayed when you add the item to the shopping cart. As of 9/20/19, it is $361.

Q: Is a 8130 form included with the Sigma Tek 4000B-3 overhauled unit?

Yes, it does. 8130-3 included in the box has dual (EASA) approval.

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