| 91-8-5 |
Agusta |
Supersedes 89-23-8 | specifies provisions for terminating inspections of main rotor blades for cracks | A109A,-II |
| 91-8-3 |
Sikorsky |
Replace unmodified forward spar cap angles having more than 1395 hrs | S-76A |
| 91-8-2 |
MDHC |
Inspect specified aluminum tail rotor blade root fittings for cracks, proper thickness | 369 series |
| 91-8-13 |
Garrett Eng |
Superseded by 96-5-3 |
| 91-7-8 |
Piper |
Rescinded 2/4/92 |
| 91-7-5 |
Gulfstream |
Test avionics bus (ASCB); replace/repair if defective | G-IV (SN 1060 thru 1089) |
| 91-7-12 |
BAe |
Supersedes 90-23-1 | replace main landing gear door aluminum hinge fittings with stainless steel hinge fittings | DH/BH/HS 125 series |
| 91-6-11 |
MBB Heli |
Modify/retrofit fuel sys; install electrostatic dischargers | BK- 117 series |
| 91-6-1 |
P&W Eng |
Supersedes 88-22-3 | inspect high turbine assembly; replace if needed | JT5D-4B1 |
| 91-5-2 |
Aerospatiale |
Inspect/repair cracked fuselage frame near eng & landing gear mounts | TB20,-21 |
| 91-5-18 |
Schweizer |
Inspect and, if needed, replace tailboom center attachment saddle fitting | 296C |
| 91-4-3 |
BAe |
Inspect right & left main landing gear side stay to wing pick-up fittings for adequate clearance & cracks; if found, modify and/or repair | 125-800A series |
| 91-4-2 |
Garrett Eng |
Supersedes 90-21-1 | replace 3rd stage turbine stator assembly per schedule | Model TPE331-1,-2,-2UA,-3U,-3UW,-5,-5A,-6,-6A turboprop; TSE331-3U turboshaft |
| 91-3-8 |
Learjet |
Deactivate & placard specified florescent lighting systems | 31;35,-A;36,-A;55,-B,-C |
| 91-3-6 |
BAe |
Inspect GCU earth wire on Garrett TFE731 eng; replace if damaged or lacks continuity | 125-800, HS-125-700A, DH/HS/BH 125 series (if retrofitted w/TFE 731) |
| 91-3-18 |
BAe |
Inspect APC warming ovens for damaged wiring and thermostats; install additional thermostat & new switch if necessary | BAe/DH/HS/BH 125 series |
| 91-3-15 |
Mooney |
Superseded by 04-23-17 |
| 91-3-12 |
Bell Heli |
Install flow restrictors on float bag inflation valves | 206A, -B, -L, L-1, L-3 |
| 91-25-9 |
Embraer |
Repetitively inspect/replace cracked elevator trim tab actuator support | 110 |
| 91-25-8 |
Cessna |
Repetitively inspect/replace cracked wing front spar upper caps | 421C, 425 |
