| 77-24-4 |
McCauley |
Periodic dye penetrant inspect 2-blade prop hubs model 2AF34C55() |
| 77-24-3 |
Hiller |
Install fuel shutoff guard | UH-12 series (all thru SN 5024) |
| 77-24-1 |
Piper |
Revised 4/78 | inspect and/or repair stabilizer & fin skin | PA-31,-325,-350 |
| 77-23-9 |
Piper |
Revised 12/78 | revise flight manual on fuel crossfeed | PA-23-250 |
| 77-23-8 |
Hughes |
Supersedes 68-17-7 | inspect main rotor blades | 269A,B |
| 77-23-7 |
Beech |
Superseded by 81-21-1 | supersedes 75-8-20 |
| 77-23-5 |
Beagle |
Replace outer wing, wing center sect, tail asmbly before 11,000 hrs | B.206-1, -2 |
| 77-23-4 |
Falcon |
Replace pressure probes each 600 hrs | 10 (SN 1 thru 56) |
| 77-23-3 |
Piper |
Check mixture, throttle, prop gov. control rod ends;replace as needed | PA28-140, -151,-180,-235; PA-28R-180,-200,-201; PA-32-260,-300; PA-32R-300,PA-34-200T |
| 77-23-11 |
Cessna |
Rework ELT installation | 182s w/ELT installed per SL SE73-41 |
| 77-23-1 |
McCauley |
Dye penetrant prop hubs each 100 hrs on D2AF34C65-(),C81-() | 310J,K,L,N |
| 77-22-5 |
Bellanca |
Replace wing front lift struts, placard & red line | all 7 series Champs |
| 77-22-4 |
Aerospatiale |
Inspect landing gear for corrosion; if corroded, replace members | SA-341G |
| 77-22-3 |
Lockheed |
Inspect & repair cracks in reinforcing doubler & ring of VHF antenna | 1329 |
| 77-22-2 |
Bellanca |
Inspect eng mount bed frame ea 100 hrs or modify w/SK1267-4019 | 14-19-3,A; 17-30,A |
| 77-22-1 |
Beech |
Revised 8/78 | supersedes 76-16-4 | periodically inspect tail spar; replace stiffeners and/or doubler if cracks are found | 65, 80, 88, 90 series |
| 77-21-7 |
MBB |
Install generator wiring assembly | BO-105A,C (SN S1 thru S160) |
| 77-21-6 |
Piper |
Annually inspect steel tubing cluster | PA-25,-235,-260 (SN 25-1 & up) |
| 77-21-4 |
Hughes |
Inspect rotor drive overrunning clutch assembly & repack bearings | 369 series |
| 77-21-3 |
Piper |
Magnify inspect rudder spar hinge | PA-36-285 (SN 36-7360001 thru -7760003) |
