| 77-21-10 |
Hughes |
Superseded by 81-17-4 | supersedes 77-1-2 |
| 77-21-1 |
Bell |
Modify tail rotor gear box | 47 series |
| 77-20-7 |
Lyc Eng |
Replace tappets | O-320-H (SN 101-76 thru 3907-76) and all remfgd prior 3-24-78 |
| 77-20-3 |
McCauley |
Supersedes 68-8-4 | dye check each 100 hrs or replace hub D2AF34C56-(),C61-() |
| 77-20-2 |
Enstrom |
Supersedes 77-4-4 | replace tail rotor spindle | F28,A,C; 280,C |
| 77-2-9 |
Cessna |
Replace wing flap actuator ball nut assembly | 150, A150, 172, 182, 206, 207 |
| 77-2-8 |
Narco |
Check battery for leaks & corrosion each 90 days | ELT-10 |
| 77-2-7 |
Beech |
Modify prop feathering system | 200 (SN BB-2 thru -50) |
| 77-2-6 |
Piper |
Inspect or modify wing fittings ea 500 hrs | PA-36 (SN 7360003 thru -7560044) |
| 77-2-5 |
Cessna |
Superseded by 79-10-15 |
| 77-2-4 |
Beech |
Revised 3/77 | inspect wing tip strobe lights if not explosion-proof | E55,-A; A56TC; 58,-A; 60,-A; B80; 70; B90,C90,E90; B55,-A; 100,A100 |
| 77-19-7 |
Beech |
Penetrant check pilot's control column components | 18 series |
| 77-19-6 |
Piper |
Inspect and rework flap solenoid and cables | PA-31,-300,-325; PA-31-350 |
| 77-19-5 |
Schweizer |
Replace flying wire terminals | G164A (SN 1715 thru 1717), G164B (SN 240B thru 269B) |
| 77-19-4 |
Hughes |
Inspect rotor strap pack | 369D |
| 77-19-3 |
Hughes |
Inspect rotor retention strap pack | 369D |
| 77-19-2 |
Gates-Lear |
Revised 7/78 | inspect and/or replace 36" cabin door locks | 23,24,25 series |
| 77-19-1 |
McCauley |
Superseded by 78-20-1 |
| 77-18-5 |
Swearingen |
Disconnect Talley nose wheel steering actuator | SA226T,-AT,-TC |
| 77-18-4 |
Beech |
Check and/or adjust cabin door latch sys | C90, E90, A100, B100, 200 |
