| 80-4-10 |
Sikorsky |
Revoked |
| 80-4-1 |
Mitsubishi |
Install improved avionic shelf | MU-2B-36, -36A, -60 |
| 80-3-8 |
deHavilland |
Supersedes 79-10-7 | dye check flap control rods | all DHC-6 |
| 80-3-7 |
Bell |
Replace rivets in fuselage | 205A-1 (SN 30001 thru 30296) |
| 80-3-5 |
Rockwell |
Revised 5/80 | inspect elevator edges | NA265-70 (SN 1 and 7), -80 |
| 80-3-3 |
Rockwell |
Deleted 7-9-80 |
| 80-3-1 |
Robinson |
Superseded by 80-8-8 |
| 80-26-6 |
Robinson |
Inspect tail rotor coupling flex plate | R-22 thru SN 0058 |
| 80-26-5 |
Piper |
100-hr inspect or replace gear door hinges | all PA-31 series thru 1980 |
| 80-26-4 |
Piper |
Revised 8/81 | inspect footstep frame at 500 hrs, then ea 100 hrs | PA-23 series |
| 80-26-2 |
Gates-Lear |
Supersedes 80-22-10 | modify FC-110 flight control sys | all 23, 25, 24, 28, 29 |
| 80-26-1 |
Sabreliner |
Inspect fuselage pressurization sys | NA265-40, -40A, -60 (SN 306-1 thru -103) |
| 80-25-7 |
Stewart |
Revised 9/81 | inspect oil cooler for date stamp; if none, replace | Bellanca, Cessna, Piper, Great Lakes, Mooney, Beech, Hughes (various models) |
| 80-25-6 |
Cont Eng |
Revised 3/81 | inspect prop shaft thrust washer | GTSIO-520-L, -M, -N |
| 80-25-5 |
Piper |
Alter voltage regulator | PA-31T(SN 8120001 thru-10), 31TI(SN 8104001 thru-12) |
| 80-25-2 |
Lyc Eng |
Inspect valve pushrods | O-235 series engs |
| 80-25-1 |
Hughes |
Replace tail rotor driveshaft couplings | 369 series |
| 80-24-4 |
Hughes |
Placard auto reignition system | 369 series |
| 80-24-3 |
Piper |
Superseded by 86-17-1 |
| 80-24-1 |
Robinson |
Repetitively inspect tailcone framework | R-22 thru SN 0082 |
