Lycoming T53 Airworthiness Directives

Every AD in the library whose text names the Lycoming T53, of which 89 are registered in the US.

7 not superseded, 4 of them with a repeat action. 8 listed in all, newest published May 24, 2022.

Published sinceHide 1 supersededOnly repeat actions7 of 8

2022-10-02Requires initial and repetitive special vibration tests of the engine and, depending on the results, replacement of either the reduction gearbox assembly or the engineEngine controls · EngineSupersedes 2002-03-01Repeat actionMay 24, 2022
2006-11-16Requires initial and repetitive visual and dimensional inspections of fuel control regulator assembly main and secondary drive shaft and pump gear splines, installed in certain fuel control regulator assembliesHoneywell International Inc. T5311A, T5311B, T5313B, T5317A, T5317A-1, and T5317B Series Turboshaft Engines and Lycoming Former Military T53-L-11B, T53-L-11D, T53-L-13B, T53-L-13B/D, and T53-L-703 Series Turboshaft Engines · EngineSupersedes 98-22-11Repeat actionMay 31, 2006
2002-15-04Honeywell International, Inc., (formerly AlliedSignal, Inc. and Textron Lycoming) T5313B, T5317 Series, and T53 Series Turboshaft EnginesEngineRepeat actionAug 6, 2002
2002-09-09Honeywell International, Inc., (Formerly AlliedSignal, Inc., Textron Lycoming, Avco Lycoming, and Lycoming) Former Military T53 Series Turboshaft EnginesEngineRepeat actionMay 9, 2002
2006-01-05Requires implementing reduced life limits for certain parts, using cycle counting methods, and using draw- down schedules to replace components that exceed the new limitsHoneywell International Inc. (Formerly AlliedSignal, Inc., Formerly Textron Lycoming, Formerly Avco Lycoming) T5309, T5311, T5313B, T5317A, T5317A-1, and T5317B Series, and T53-L-9, T53-L-11, T53-L-13B, T53-L-13BA, T53-L-13B S/SA, T53-L-13B S/SB, T53-L-13B/D, and T53-L-703 Series Turboshaft Engines · EngineSupersedes 87-12-05Jan 12, 2006
97-21-07 R1AlliedSignal Inc. (Formerly Textron Lycoming) Model T5313B, T5317A, and T53 (Military) Turboshaft EnginesEngineJun 19, 1998
97-21-07AlliedSignal Inc. (Formerly Textron Lycoming) Model T5313B, T5317A, and T53 (Military) Turboshaft EnginesEngineOct 17, 1997

Listed by the model designations in each AD's text. An AD written for a part number, or for "all" engines of a maker, may name no model and so not appear here: search the library for the part or the maker as well.