Lamar B-00392-1 VOLTAGE REGULATOR,14V, PARALLEL, FOR PIPER

The **Lamar B-00392-1 Alternator Control** (P/N **B-00392-1**) is a 14 V aircraft electrical component used in compatible Piper PA-44 Seminole twin-engine aircraft. The unit provides pulse-width-modulated alternator field regulation to maintain the aircraft charging system voltage. It incorporates overvoltage protection and field short-circuit protection, with a latching shutdown function that can be reset by momentarily removing the 14 V supply. When installed as a pair with the equaliser connection, the regulators support automatic alternator load balancing while maintaining independent left and right alternator control systems. The B-00392-1 is identified in the Piper PA-44-180/180T maintenance manual for applicable aircraft serial numbers. --- ## Applications Suitable for applicable: - **Piper PA-44-180 Seminole** – Applicable 14 V twin-engine alternator systems - **Piper PA-44-180T Turbo Seminole** – Applicable aircraft electrical installations - **14 V Aircraft Electrical Systems** – Alternator voltage regulation and load balancing - **Aircraft Electrical System Maintenance** – Replacement of compatible alternator control units The Piper maintenance manual identifies B-00392-1 installations on applicable aircraft from serial number 44-95001 onwards. Aircraft eligibility and serial-number applicability must be checked against the relevant maintenance documentation. --- ## Why CJ Aerospace? CJ Aerospace supplies aircraft electrical components, voltage regulators and replacement electrical system parts for a range of aviation applications. Our team can assist with product information, availability and part-number identification. - 🇦🇺 **Australian-owned and operated** - 📦 **Aircraft electrical components and replacement parts** - 🔧 **Technical assistance with part identification and compatibility** - ✈️ **Support for aircraft owners, operators and aviation professionals** > ✉️ [Contact us at sales@cjaerospace.com.au](mailto:sales@cjaerospace.com.au) > Need help identifying the correct aircraft alternator control unit? Contact our team for assistance.

- **14 V Alternator Control** – Designed for compatible Piper Seminole aircraft electrical systems - **Pulse-Width-Modulated Regulation** – Controls alternator field output to maintain charging system voltage - **Automatic Load Balancing** – Supports coordinated operation of parallel alternators through an equaliser connection - **Overvoltage Protection** – Latches off regulator output following an overvoltage event - **Field Short-Circuit Protection** – Protects the regulator against field output shorts to ground - **Independent Alternator Systems** – Allows the unaffected alternator system to continue operating if the other system is switched off - **Piper PA-44 Applications** – Documented for applicable PA-44-180 and PA-44-180T aircraft