SERVICE LETTER INDEX - Twin Commander Aircraft LLC

C C C C CSL P P P P PNO. 1 2 3 4 5 SUBJECT DATE EFFECTIVITY186 X X MAIN LANDING GEAR UPLOCK ARM MOD ..................22-Nov-66 MODEL 500A, 500B, 500U, 680F,680F(P), 680FL, 680FL(P) AND680T S/N 871 THRU 1640187 X OVERHEAD SWITCH PANEL BUS CIRCUIT..................30-Nov-66 MODEL 680T S/N 1473 THRUPROTECTION 1692188 X INSULATION OF ENGINE BLEED SWITCH 8-Dec-66 MODEL 680T S/N 1473 THRU1708189 X PROPELLER ATTACH BOLTS ........................................23-Dec-66 MODEL 680T S/N 1473 THRU1628 LESS 1519, 1552, 1575,1579, 1581, 1583, 1593, 1601THRU 1616, 1622 THRU 1626THRU 1626190 X X INSTALLATION OF IMPROVED ROLLER.......................29-Dec-66 MODEL 500B, 500U, 560, 680F,BUSHING MAIN LANDING GEAR DOOR680FL, 680FL(P) AND 680T S/NLATCH ASSY 1400 THRU 1660191 X ENGINE COWLING CHAFING STRIP .............................18-Jan-67 MODEL 680T S/N 1473 THRU1601, 1612, THRU 1620, 1628192 X DEFLECTOR INSTALLATION--NOSE LANDING............18-Jan-67 MODEL 680T S/N 1473 THRUGEAR 1605, 1610, 1612, 1616, 1618,1620, 1628, 1675 AND 1684193 X INSTALLATION OF IO-540-EIB5 AND.............................25-Jan-67 MODEL 500B, 560F, 680F,IGSO-540-B1C ENGINES EQUIPPED WITH680F(P), 680FL, AND 680FL(P)1200 SERIES MAGNETOS S/N 871 THRU 1663195 X RIVET REPLACEMENT AT FUSELAGE FRAME............15-Feb-67 MODEL 680T S/N 1473 THRUSTATION 38.00, LEFT AND RIGHT SIDE 1605 AND 1610, 1612, 1618, 1620,1628, 1675 AND 1684196D X FLIGHT INTO KNOWN ICING..........................................3-Aug-70 MODEL 680T, 680V, 680W AND681197 X INVERTER WIRING MODIFICATION-EGT AND.............8-Mar-67 MODEL 680T S/N 1534 THRUHORSEPOWER INDICATING SYSTEMS 1550, 1554 THRU 1571, 1573THRU 1581, 1584 THRU 1601,1610, 1612, 1616, 1618, 1620,1628, 1675, 1676, 1684 AND 1699198A X X X APPROVED OILS FOR COOLING UNIT (BOOT.............7-Feb-68 MODEL 720, 680F(P), 680FL(P),STRAP) AND CABIN PRESSURIZATION680T AND 680VSUPERCHARGER199 X MODIFICATION OF ENGINE TAIL PIPE .........................14-Mar-67 MODEL 680T S/N 1473 THRUMOUNTING 1703200 X CABIN HEATER FUEL BOOST PUMP ............................1-May-67 MODEL 680T S/N 1473 THRUMODIFICATION 1677, EXCEPT 1583, 1609, 1630,1632, PLUS 1684, 1693, 1694,1698 AND 1699202 X X DIODE INSTALLATION--MASTER BATTERY.................31-May-67 ALL PROP-DRIVEN MODELS,SWITCH POLARITY PROTECTIONEXCEPT MODEL 500U AND 680T203 X X X RUDDER TORQUE TUBE DRAIN HOLE ........................19-Jun-67 ALL MODELS S/N 2 THRU 1727204 X X IMPROVED ELECTRICAL SYSTEM................................20-Oct-67 ALL MODELS S/N 1473 THRU1535205 X X EMERGENCY EXIT LATCH ASSY INSPECTION ...........12-Nov-67 MODEL 680FL, 680FL(P), 680TAND 680V S/N 1261 THRU 1700206 X ELECTRICAL PROPELLER DEICING SYSTEM .............23-Jan-68 MODEL 680T AND 680V WITHB.F.GOODRICH ELECTRIC PROPDEICING SYSTEM INSTALLEDPRIOR TO JAN 23, 1968207 X X MOD-MLG AND NOSE WHEEL INSTALLATION ............8-Apr-68 MODEL 500A, 500B, 500U, 560F,680F, 680FL, 680F(P), 680FL(P),680T, 680V AND 680W208 X CONVERSION FROM TPE331-43 TO.............................1-May-68 MODEL 680T AND 680V S/N 1473TPE331-43A ENGINES THRU 1720209 X INTERSTAGE BLEED AIR DUCT ....................................14-Jun-68 MODEL 680T, 680V AND 680WS/N 1473THRU 1790210 X X X POWER BRAKE VALVE SUPPORT TUBE .....................25-Oct-68 ALL MODELS THRU S/N 1799ASSEMBLY INSPECTION211 X X X NITROGEN STORAGE CYLINDER PRESSURE ............26-May-69 ALL MODELS S/N 871 THRU 1874GAGE MODIFICATION212A X X X REPLACEMENT OF NOSE GEAR POSITION ................18-Apr-86 ALL MODELS S/N 151 THRU 1850;INDICATOR SWITCHES MODEL 500S THRU S/N 1876;MODEL 680W THRU S/N 1850213 X REPLACEMENT--ENGINE DRAIN MANIFOLD...............28-May-69 MODEL 680T, 680V AND 680WASSY S/N 1473 THRU 1850PAGE 6 OF 17 REVISED DECEMBER 2002TWIN COMMANDER AIRCRAFT LCC 1176 Telecom Drive Creedmoor, NC 27522Telephone: 919-956-4300 Fax: 919-682-3786 www.twincommander.com