| Description | Part# | Item Desc | Price |
| STC'S & MODIFICATIONS | |||
| R101 | AA1 series engine upgrade STC to O-290 or O-320. PAPERWORK ONLY |
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| R102 | AA1 Series gross weight (to be used with engine upgrade STC) | ||
| R501 | AA5/AA5A O-320 High compression Piston upgrade STC | ||
| FletchAir has acquired a majority of the STC's from Aviation Developement | |||
| R507 | Split Nose Cowl STC '75 Traveler, AA5A and AA5B | ||
| R507-1 | Split Nose Cowl STC '72 - '74 Traveler | ||
| R108 | Split Nose Cowl STC AA1 through AA1B | ||
| R1081 | Split Nose Cowl STC AA1C | ||
| R106 | Hinged upper engine cowling STC for AA1 through AA1C. Provides convenient access to engine compartment from the top without having to remove the top engine cowling. |
