Hughes 600N Airworthiness Directives

Every AD in the library whose text names the Hughes 600N, of which 24 are registered in the US.

21 not superseded, 11 of them with a repeat action. 25 listed in all, newest published September 29, 2026.

Published sinceHide 4 supersededOnly repeat actions21 of 25

2026-19-01Rotorcraft flight controlRotorcraftSupersedes 2024-23-06Repeat actionSep 29, 2026
2025-17-11Requires repetitively inspecting certain part-numbered T/R pedal support brackets and depending on the results, replacing the T/R pedal support bracket or refinishing any exposed areasTail rotor control system · RotorcraftRepeat actionSep 5, 2025
2021-22-11Requires a one-time visual and recurring borescope inspections of the torque tube and depending on the results, removing the torque tube from serviceTail rotor control system · RotorcraftRepeat actionDec 6, 2021
2020-18-20Requires tap inspecting each MR blade leading edge abrasion stripMain rotor blade · RotorcraftRepeat actionSep 23, 2020
2020-06-11Requires establishing a life limit for the main rotor (M/R) blade upper control collective/longitudinal link assembly (link assembly)Main rotor control · RotorcraftRepeat actionMar 24, 2020
2019-05-04Requires inspecting each main rotor blade (MRB) for a crackMain rotor blade · RotorcraftRepeat actionMar 13, 2019
2013-03-03Tail rotor bladesRotorcraftRepeat actionFeb 8, 2013
2008-20-05MD Helicopters, Inc. Model 600N HelicoptersRotorcraftSupersedes 2006-08-12, 2001-24-51, 2008-05-17Repeat actionOct 10, 2008
2005-21-02MD Helicopters, Inc. Model 369D, 369E, 369F, 369FF, 500N, and 600N HelicoptersRotorcraftSupersedes 2003-24-01Repeat actionOct 17, 2005
2000-08-22MD Helicopters Inc. Model 369D, 369E, 500N, and 600N HelicoptersRotorcraftRepeat actionMay 5, 2000
98-15-26McDonnell Douglas Helicopter Systems Model 369A, 369D, 369E, 369F, 369FF, 369H, 369HE, 369HM, 369HS, 500N, 600N, and OH-6A HelicoptersRotorcraftSupersedes 98-03-15, 95-03-13, 96-10-09Repeat actionJul 23, 1998
2016-04-15Requires ensuring the life limit of the pin as listed in the Airworthiness Limitations section of aircraft maintenance records and Instructions for Continued Airworthiness (ICA)Main rotor blades · RotorcraftFeb 25, 2016
2016-01-19Requires establishing a life limit of 10,000 hours time-in-service (TIS) on these rotating cone assembliesRotorcraft tail boom · RotorcraftJan 21, 2016
2008-22-52Requires turning OFF the Yaw Stability Augmentation System (YSAS); installing a placard that limits airspeed to 100 KTS or V<INF>NE</INF>, whichever is less; and revising the limitations section of the Rotorcraft...MD Helicopters, Inc. Model 500N and 600N Helicopters · RotorcraftSupersedes 2008-18-52, 2008-22-53Nov 28, 2008
2004-22-12Requires replacing the fuselage Station 75 control support bracket assembly (control support bracket), reducing the life limit, and revising the Limitations section of the applicable maintenance manual to state the...MD Helicopters, Inc. Model 600N Helicopters · RotorcraftOct 29, 2004
2004-20-08Requires replacing the cable assembly with an airworthy cable assembly before further flightMD Helicopters, Inc. (MDHI) Model 500N and 600N Helicopters · RotorcraftOct 6, 2004
2003-16-11Requires reducing the life limit of the main rotor drive shaft (drive shaft) and changing the life limit on the component history card or equivalent recordMD Helicopters, Inc., Model 600N Helicopters · RotorcraftAug 26, 2003
99-25-08MD Helicopters, Inc. HelicoptersRotorcraftFeb 15, 2000
99-20-12Requires replacing the oil cooler blower bracket (bracket)MD Helicopters Inc. Model 369D, D369E, 369FF, 500N, and 600N Helicopters · RotorcraftSep 30, 1999
99-17-18Requires applying serial numbers to several life-limited components related to pitch control and removing and replacing the components according to new life-limitsMD Helicopters, Inc. Model 600N Helicopters · RotorcraftAug 20, 1999
99-08-07MD Helicopters, Inc. HelicoptersRotorcraftApr 6, 1999

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.