| 81-6-6 |
BAe |
Check fuel line & flap control | DH125-1A thru DH125-600A |
| 81-6-5 |
Bell |
Revised 6/81 | relocate fuel filter & hose | 206L-1 (SN 45154 thru 45448) |
| 81-6-4 |
Aerospatiale |
Inspect deck/bellcrank support; install clamps | SA315;SA316;SA318;SA319 series |
| 81-6-1 |
Mitsubishi |
Revised 4/81 | Modify eng nacelles | MU-2B, -10, -15, -20 & MU-2B-25, -26 |
| 81-5-52 |
Robinson |
Supersedes 81-3-52 | repetitive inspect main gearbox input flex yoke | R-22 |
| 81-5-5 |
Cessna |
Superseded by 83-14-4 |
| 81-5-4 |
Dowty-Rotol |
Supersedes 80-15-9 | prevent blade tip failure | props on PZL-3S eng |
| 81-5-2 |
Falcon |
Supersedes 78-22-3 | modify air cond sys | 10 |
| 81-5-1 |
Cessna |
Check fuel quantity gauges & markings | 152 (SN -83592 thru -84627), A152 (SN -879 thru -952); 172N,P (-72885 thru -74357); R172K (-3200 thru -3403); 172RG (-1 thru -698) |
| 81-4-8 |
Bell |
Superseded by 96-6-4 |
| 81-4-7 |
Piper |
Superseded by 82-27-8 |
| 81-4-5 |
Piper |
Revised 2/82 | Periodically inspect or replace flaps | PA-23 series |
| 81-4-4 |
Cessna |
Superseded by 81-16-9 |
| 81-4-3 |
Bell |
Inspect tail rotor drive bearing | 47 series |
| 81-4-2 |
Gulfstream |
Modify aircraft flight manual | GI (G-159) |
| 81-4-1 |
Hiller |
Inspect rudder balance cable assembly | UH-12E, 4, T, L |
| 81-3-52 |
Robinson |
Superseded by 81-5-52 |
| 81-3-5 |
Lyc Eng |
Modify fuel injector | 1GSO-480-A1E6; IO-540-A1A5, -B1C5, -K1E5; IGO-540-A1A, -B1A, -B1C; IGSO-540-A1A, -A1C, -A1D, -A1E, -A1H |
| 81-3-4 |
Aerospatiale |
Repetitively inspect transmission components | SA315; SA316B,C; SA319 |
| 81-3-1 |
MBB |
Replace defective Bendix drive shafts | BO-105 |
