| 57-13-7 |
Universal |
Superseded by 58-10-3 |
| 57-13-5 |
Ham-Std |
Rework all aluminum alloy blades |
| 57-13-3 |
Ercoupe |
Superseded by 59-5-4 |
| 57-13-1 |
Lake |
Magnify inspect engine strut | all C-1 models |
| 57-10-2 |
Piper |
Rework oil pressure gauge line | SN 23-1 thru 23-1391 |
| 57-10-1 |
Mooney |
Replace landing gear bracket | SN 1002 thru 1126 |
| 57-1-2 |
Piper |
Stabilizer attachment bolts | SN 23-1 thru 23-844 |
| 56-6-1 |
Cont Eng |
Replace piston pins | models O-470-A,B,E-225-4,-8 & E-185-8,-9,-11 |
| 56-4-1 |
Bellanca |
Inspect control stick fitting for cracks | 7EC (SN 300 thru 370) |
| 56-3-3 |
Navion |
Reinforce rear wing spar fitting; inspection recurringly | all models |
| 56-27-4 |
Navion |
Modify engine cooling kit | all B models |
| 56-27-3 |
Piper |
Reinforce aileron balance weight | SN 23-1 thru 23-800 |
| 56-26-3 |
P&W Eng |
Superseded by 57-5-4 |
| 56-22-1 |
Ham-Std |
Rework all aluminum alloy blades |
| 56-20-1 |
Beech |
Inspect tail wheel axle | all E18S models |
| 56-2-1 |
Rockwell |
Reinstall augmenter tube | 560A (SN 231 thru 269) |
| 56-16-4 |
Universal |
Replace landing gear torque knees | all models GC-1A,-1B |
| 55-8-4 |
Piper |
Replace ignition filter | SN 22-1621 thru 22-1637 |
| 55-7-2 |
Piper |
Reinforce landing gear tube | SN 22-1 thru 22-2392 |
| 55-4-1 |
Federal |
Replace rigger | all Cessna 180 models w/skis AWB-2500A |
