trion (Airframe, Powerplant, Propeller, Or Appliance) Foam, aviation Aasenlernace ran APWIhea mwomen 3129CO20 EMCItrOC TWOS ( I Ninte, 6 • yen Vas Orer INSTRUCTIONS: Prom or type all entries. See Tile 14 CFR 643.9. Part 43 Appendix B. and AC 439.1 (or subsequent revision thereof) for instructions a