Okay, Rick Hestilow just emailed me. In addition to the Appendix 'A' work, the STC allows C150/152/172 owners to perform the following:
List of items included on TOPCAT Primary Category STC (STC SA09643SA, Rev. 1 & STC SA10114SC) for Cessna Model 150/152 and 172 Series aircraft
1. Replacement of flexible air ducting.
2. Replacement of static discharge wicks.
3. Replacement of fuel quick drains and filter cap gaskets and seals.
4. Replacement of Hour/Hobbs meter.
5. Replacement of brake pads, disc brakes.
6. Replacement of propellers.
7. Performance of engine cylinder compression check.
8. Replacement of engine accessory belts.
9. Engine oil change.
10. Replacement of navigation and communications radios where alterations to electrical circuitry are not required.
11. Removal of exhaust manifolds for gasket replacement as long as removal of other components is not required.
12. Replacement of starters.
13. Replacement of alternators.
14. Replacement of generators.
15. Replacement of vacuum pumps.
16. Fabrication/replacement of ? -inch diameter of less hard lines, regardless of their use (i.e., fuel, electrical, hydraulic, vent, vacuum, etc.).
17. Check control cable condition and tension (rigging or adjustment is not permissible).
18. Windshield scratch removal.
19. Sheet metal repair of aircraft skin damage of less than 2 inches.
20. Bleeding of brake system.
21. Replacement of engine rocker box cover and rocker box cover gaskets.
22. Replacement of engine and vacuum system air filters.
23. Service and or replacement of shimmy damper.
24. Lubrication and or replacement of the tachometer cable.
25. Replacement of the voltage regulator.
26. Removal or installation of the approved wheel pants with appropriate weight and balance computations and changes in the aircraft?s weight and balance records and the aircraft?s equipment list.
27. Cleaning the air / oil separator when installed.
28. Installation of approved oil quick drains and their replacement.
That's a whole buncha gas you can buy with those labor savings!
