+$200 Core Exchange Charge
Part# 07-01414
MFR Model# AL12-EI70/B


The AL12-EI70 kit includes a high output AIRCRAFT alternator with an exclusive internal crowbar over-voltage protection circuit. The alternator is fully pilot controllable through unique internal wring. The dual internal fans are designed for aircraft engine rotation for maximum cooling. The AL12-EI70 kit includes the tension arm, mounting brackets, all required AN hardware, and V-Belt for Superior and most Lycoming engines with a 9-3/4 engine pulley.

California Prop 65 Warning Symbol

WARNING: Cancer and Reproductive Harm -

Core Return Policy

Any unit being returned for core or warranty core credit shall be, as removed from the engine, complete and not disassembled. No core or warranty core credit will be allowed for automotive units. Units that are rusty or cannot be overhauled for any reason will be classified as scrap, having no value. Units which have been weld repaired, as well as units which have been disassembled and then reassembled with old parts, will also be classified as scrap, having no value. A percentage of the core value will be charged for all missing or damaged parts. At no time will the damaged or missing parts charge on any unit exceed the core value of that unit.

1. Core will only be accepted for credit 12 months from date of invoice.
2. Cores returned in excess of cores invoiced will not be accepted.
3. Cores must be of like purchase, a directly superseded unit or replaced unit when installing an STC'd product.
4. Competitive product cores are acceptable returns.
5. Cores must have a legible data tag for part and serial number verification.

Note: Customer will need to provide core for overhaul in the event our supplier does not have cores available to overhaul.


Ive had pretty good luck with this alternator. I just replaced it at 1000 hours just for my own piece of mind. The 70A runs at a slower RPM than the 60A, and works well on my IO-540. If I were doing it all over again though Id consider doing an externally regulated alternator with an adjustable regulator. Mine runs between 13.9 and 14.0V right now, and it would be nice to tweak that to 14.2.

Tim O
May 3, 2018


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: Is the Plane Power AL12-EI70 Alternator FAA Approved for use in certified aircraft?

No, these are intended for use in experimental aircraft only.

Q: What are the part numbers for the Bracket, adjustment link, and support?

The bracket is our part number 07-18013, the adjustment link is 07-17782, and the support arm is a special order Hartzell part number 10-1002.

Q: What is the core charge for? I just want to buy an alternator

Hartzell implemented core charges all Plane Power products. The core charge is refunded when the unit that is removed from the aircraft is returned.

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