14 ADs indexed for Curtiss-Wright/Marquette, Inc. | Hamilton Standard aircraft.
WRIGHT Models TC18DA and TC18EA Series Engines
Unsafe Condition: Improper PRT cooling shield to wheel lip clearance exceeding 0.080 inch with the wheel in the outermost position, and looseness of the turbine wheel and shaft nut indicating overheating, which coul...
Why matched: WRIGHT Models TC18DA and TC18EA Series Engines
Airworthiness Directives; WRIGHT: Applies to All TC18DA and TC18EA Series Engines
Unsafe Condition: The unsafe condition involves potential engine reliability issues due to inadequate piston compression ring performance, improper cylinder barrel finish, crankcase oil manifold diverter valve confi...
Why matched: Airworthiness Directives; WRIGHT: Applies to All TC18DA and TC18EA Series Engines
WRIGHT Models TC18DA and TC18EA Series Engines
Unsafe Condition: Inadvertent loss of oil from the power recovery turbine fluid couplings due to regulator spring failure.
Why matched: WRIGHT Models TC18DA and TC18EA Series Engines
WRIGHT Models C9GB, C9GC, C9HD and Military R-1820 Series Engines
Unsafe Condition: Piston pin failures due to uncarburized piston pins P/N 68827, 117691, and 131061.
Why matched: WRIGHT Models C9GB, C9GC, C9HD and Military R-1820 Series Engines
HAMILTON STANDARD Governors
Unsafe Condition: Adverse environmental conditions in the propeller governor resulting from certain types of engine failure have caused improper operation of the governor in such a manner as to result in propeller o...
Why matched: HAMILTON STANDARD Governors
WRIGHT Model 977C9HD1, 2 and 3 Engines
Unsafe Condition: Failures of the master rod assemblies
Why matched: WRIGHT Model 977C9HD1, 2 and 3 Engines
WRIGHT Models TC18DA and TC18EA Series Engines
Unsafe Condition: Propeller shaft cracking through the hydro-oil holes has occurred, causing a loss of propeller control.
Why matched: WRIGHT Models TC18DA and TC18EA Series Engines
HAMILTON STANDARD Governors
Unsafe Condition: Adverse environmental conditions in the propeller governor resulting from certain types of engine failure have caused improper operation of the governor in such a manner as to result in propeller o...
Why matched: HAMILTON STANDARD Governors
WRIGHT Models TC18DA and TC18EA Series Engines
Unsafe Condition: The use of impeller drive secondary pinion bushings with part numbers 170217, 170148, 145213, and 171190 may result in reduced durability of the impeller drive gear assemblies.
Why matched: WRIGHT Models TC18DA and TC18EA Series Engines
WRIGHT Models 975C18CB1, 972TC18DA1, and 972TC18DA2 Engines
Unsafe Condition: Front intermediate cam drive gear failures and associated possible engine overspeeding.
Why matched: WRIGHT Models 975C18CB1, 972TC18DA1, and 972TC18DA2 Engines
HAMILTON STANDARD Governors Installed on Wright TC18DA and TC18EA Series Turbocompound Engines
Unsafe Condition: Gear shafts P/N 67035 in Hamilton Standard governors may fail, leading to loss of engine governor control.
Why matched: HAMILTON STANDARD Governors Installed on Wright TC18DA and TC18EA Series Turbocompound Engines
WRIGHT Models C18CA, C18CB, TC18DA, and TC18EA Series Engines
Unsafe Condition: The engine front section bearing durability may be insufficient due to improper assembly of the propeller shaft thrust bearing (ball bearing) and radial bearing (roller bearing).
Why matched: WRIGHT Models C18CA, C18CB, TC18DA, and TC18EA Series Engines
WRIGHT Models C18BA and C18BD Engines
Unsafe Condition: Crankpin sludge washing into the master rod bearing oil supply passages causing bearing failure.
Why matched: WRIGHT Models C18BA and C18BD Engines
WRIGHT Models TC18DA and TC18EA Series Engines
Unsafe Condition: The intermediate impeller drive gear assemblies may fail due to insufficient durability.
Why matched: WRIGHT Models TC18DA and TC18EA Series Engines
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