Alternator Upgrades

Single or Twin Engine Aircraft FAA-PMA Alternator Upgrades from 70 to 100 Amps available for approval OR Field Approval Installation:

This is only a partial list of what we can do. Call us if you don’t see your model listed here. We also do custom work!

N300 Series – STC’d approvals

  • Cessna 310/320 100 Amps Alternator Upgrades
  • Beech Bonanza F33 and G33 in 70 and 100 amps

N300 Series – available as PMA’d replacements or field approvals for 100 amp.

  • Beech Baron in 70 amps
  • Beech Baron in 100 amps
  • Cessna 206 and 210 in 100 amps
  • Cessna 180, 182 and 185 100-amps upgrade in 14 or 28 volts
  • Comanche 260 and 400, 70 and 100 amps Alternator Upgrade
  • Aerostar 600/700 in 70 and 100 amps
  • Aero Commander 112 & 114, 70 and 100 amps

Click here for Generator Upgrades & Conversions.

All alternators are belt-driven, light weight, small case and weigh 11.1 pounds. Alternators are supplied with basic mounting hardware brackets, as required. Detailed installation data is supplied via copies of previously-approved FAA field approval 337 form to help facilitate local FSDO installation approval.

Warranty period is 600 operating hours or 2 years, whichever comes first. Factory rebuilds are available. For more details or orders, call National AirParts, Inc. at 1-800-713-1111 or 386-734-3365. Or email:


National alternators are available from 70 to 200 amps for special purpose aircraft. Contact us for specific information and detailed applications.