| 85-6-51 |
Allison |
Replace magnetic plugs in gearbox | 250-C30, -C30S on S-76A |
| 85-6-4 |
Piper |
Install quick fuel drain valve; placard | J-3; PA-11,-12,-14,-16,-18,-20,-22 series |
| 85-6-1 |
Rolls-Royce |
Supersedes 77-18-2 & 78-1-7 | modify flame tube liner & pins | Dart eng (G-159) |
| 85-5-2 |
Beech |
Modify fuel selector guard | 19, 23-19, 23(thru M-2223), 23-24, 24 (thru MC-695) |
| 85-5-1 |
Piper |
Inspect bulkhead 332.0 ea 200 hrs or reinforce or replace | all PA-31P |
| 85-4-51 |
Garrett |
Each 75 hours, inspect seal 6th stage turbine rotor | ATF3-6-2C eng |
| 85-4-3 |
Mitsubishi |
Modify pitot system | all MU-2 series thru SN 753 |
| 85-4-1 |
Fairchild |
Revised 10/85 | supersedes 83-19-2 | inspect hydraulic & oxygen lines | SA226-T, -AT, -TC (thru SN TC397) |
| 85-3-51 |
Cessna |
If installed, modify SAFT 40976 battery | 650 (thru SN -0072), 552 (thru -0008) |
| 85-3-4 |
Gulfstream |
Revised 4/87 | may use modification in 77-16-9 or previous revision of 85-3-4 |
| 85-3-3 |
Rolls-Royce |
Revised 1/86 | inspect low-pressure impellers | Dart engs on G-159 |
| 85-3-1 |
Cessna |
Inspect & modify/replace engine controls | 205 (thru SN -0479), 206 (thru -1444), P206 (thru -0603), 207 (thru -014), 210 (-57841 thru -59199), T210 (thru -0454) |
| 85-26-6 |
Bell |
Supersedes 82-17-4 | flight in icing conditions prohibited unless proper optional equipment installed | T303 |
| 85-26-5 |
Gulfstream |
Inspect & apply corrosion protection to rudder torque tube | GA-7 |
| 85-26-3 |
Scott |
Inspect/replace oxygen connectors | various models |
| 85-26-2 |
MBB |
Clean & seal hydraulic actuators | BO-105 (thru SN 750) |
| 85-26-1 |
Secur |
Modify seat belts | Aerospatiale SA260C |
| 85-25-9 |
Allison |
Each 300 hrs inspect or modify turbine shaft couplings | 250-C28B, -C28C |
| 85-25-8 |
Allison |
Inspect ea 300 hrs or replace compressor mount | 250-C28B,-C28C; C30, C30P,-S |
| 85-25-7 |
Allison |
Revised 1/86 | modify/replace outer combustion case | 250-C28B,-C;-C30,-P; -C30R,-S engs |
