MD Airworthiness Directives

647 ADs indexed for MD aircraft.

Models

Various 80 ADs 369D 55 ADs 369E 48 ADs 369H 43 ADs 369FF 39 ADs 369HE 39 ADs 369HS 39 ADs 369HM 38 ADs 369A 36 ADs 369F 32 ADs 369 24 ADs MD900 23 ADs 500N 22 ADs 600N 22 ADs 369 (Army YOH-6A) 2 ADs 369A (Army OH-6A) 2 ADs 369D 2 ADs 369E 2 ADs 369F 2 ADs 369FF 2 ADs 369H 2 ADs 369HE 2 ADs 369HM 2 ADs 369HS 2 ADs 500N 2 ADs 600N 2 ADs 269A 2 ADs 269A-1 2 ADs 269B 2 ADs 369H 2 ADs 369HE 2 ADs 369HM 2 ADs 369HS 2 ADs 212 1 AD 214B 1 AD 214B-1 1 AD 214ST 1 AD 412 1 AD 412CF 1 AD 412EP 1 AD 429 1 AD 430 1 AD A109 1 AD A109A 1 AD A109A II 1 AD A109C 1 AD A109E 1 AD A109K2 1 AD A109S 1 AD AB139 1 AD AB412 1 AD AB412 EP 1 AD AS-365N3 1 AD AS332L2 1 AD AW109SP 1 AD AW139 1 AD EC135P1 1 AD EC135P2 1 AD EC135P2+ 1 AD EC135T1 1 AD EC135T2 1 AD EC135T2+/EC635T2+ 1 AD EC225LP 1 AD MBB-BK 117 C-2 1 AD MD900 1 AD S-61L 1 AD S-61N 1 AD S-61NM 1 AD S-61R 1 AD S-70 1 AD S-70A 1 AD S-70C 1 AD S-70C(M) 1 AD S-70C(M1) 1 AD S-76A 1 AD S-76B 1 AD S-76C 1 AD S-76D 1 AD S-92A 1 AD 206 1 AD 206A 1 AD 206A-1 (OH-58A) 1 AD A109 1 AD A109A 1 AD A109A II 1 AD A109C 1 AD A109E 1 AD A109K2 1 AD A109S 1 AD 206A 1 AD 206B 1 AD 206L 1 AD 206L-1 1 AD 206L-3 1 AD 206L-4 1 AD 210 1 AD 212 1 AD 369D 1 AD 369E 1 AD 369F 1 AD 369FF 1 AD 369HE 1 AD 369HM 1 AD 369HS 1 AD 407 1 AD 412 1 AD 412CF 1 AD 412EP 1 AD 500N 1 AD AB412 1 AD AB412 EP 1 AD AS350B 1 AD AS350B1 1 AD AS350B2 1 AD AS350B3 1 AD AS350BA 1 AD AS350C 1 AD AS350D 1 AD AS350D1 1 AD AS355E 1 AD AS355F 1 AD AS355F1 1 AD AS355F2 1 AD AS355N 1 AD BO-105A 1 AD BO-105C 1 AD BO-105LS A-3 1 AD BO-105S 1 AD EC120B 1 AD EC130B4 1 AD EC135P1 1 AD EC135P2 1 AD EC135P2+ 1 AD EC135P3 1 AD EC135T1 1 AD EC135T2 1 AD EC135T2+ 1 AD EC135T3 1 AD MBB-BK 117 C-2 1 AD MBB-BK 117 D-2 1 AD R44 1 AD R44 II 1 AD R66 1 AD S-76A 1 AD S-76B 1 AD S-76C 1 AD 107-II 1 AD 1100 1 AD 204B 1 AD 205A 1 AD 205A-1 1 AD 205B 1 AD 206 1 AD 206A 1 AD 206A-1 1 AD 206A-1 (OH-58A) 1 AD 206B 1 AD 206B-1 1 AD 206L 1 AD 206L-1 1 AD 206L-3 1 AD 206L-4 1 AD 210 1 AD 212 1 AD 222 1 AD 222B 1 AD 222U 1 AD 230 1 AD 234 1 AD 269A 1 AD 269A-1 1 AD 269B 1 AD 269C 1 AD 269C-1 1 AD 269D 1 AD 280 1 AD 280C 1 AD 280F 1 AD 280FX 1 AD 305 1 AD 369 1 AD 369A 1 AD 369D 1 AD 369E 1 AD 369F 1 AD 369FF 1 AD 369H 1 AD 369HE 1 AD 369HM 1 AD 369HS 1 AD 407 1 AD 412 1 AD 412CF 1 AD 412EP 1 AD 427 1 AD 429 1 AD 430 1 AD 47 1 AD 47B 1 AD 47B3 1 AD 47D 1 AD 47D1 1 AD 47E 1 AD 47G 1 AD 47G-2 1 AD 47G-2A 1 AD 47G-2A-1 1 AD 47G-3 1 AD 47G-3B 1 AD 47G-3B-1 1 AD 47G-3B-2 1 AD 47G-3B-2A 1 AD 47G-4 1 AD 47G-4A 1 AD 47G-5 1 AD 47G-5A 1 AD 47H-1 1 AD 47J 1 AD 47J-2 1 AD 47J-2A 1 AD 47K 1 AD 480 1 AD 480B 1 AD 500N 1 AD 505 1 AD 600N 1 AD A109 1 AD A109A 1 AD A109A II 1 AD A109C 1 AD A109E 1 AD A109K2 1 AD A109S 1 AD A119 1 AD AB139 1 AD AB412 1 AD AB412 EP 1 AD AS-365N2 1 AD AS-365N3 1 AD AS332C 1 AD AS332C1 1 AD AS332L 1 AD AS332L1 1 AD AS332L2 1 AD AS350B 1 AD AS350B1 1 AD AS350B2 1 AD AS350B3 1 AD AS350BA 1 AD AS350C 1 AD AS350D 1 AD AS350D1 1 AD AS355E 1 AD AS355F 1 AD AS355F1 1 AD AS355F2 1 AD AS355N 1 AD AS355NP 1 AD AW109SP 1 AD AW119 MKII 1 AD AW139 1 AD AW169 1 AD AW189 1 AD B-2 1 AD B-2A 1 AD B-2B 1 AD BO-105A 1 AD BO-105C 1 AD BO-105LS A-1 1 AD BO-105LS A-3 1 AD BO-105S 1 AD CABRI G2 1 AD CH-47D 1 AD CH-54A 1 AD EC 155B 1 AD EC120B 1 AD EC130B4 1 AD EC130T2 1 AD EC155B1 1 AD EC225LP 1 AD F-28 1 AD F-28A 1 AD F-28C 1 AD F-28C-2 1 AD F-28C-2R 1 AD F-28F 1 AD F-28F-R 1 AD FH-1100 1 AD K-190A 1 AD K-225 1 AD K-240 1 AD K-600 1 AD MBB-BK 117 A-1 1 AD MBB-BK 117 A-3 1 AD MBB-BK 117 A-4 1 AD MBB-BK 117 B-1 1 AD MBB-BK 117 B-2 1 AD MBB-BK 117 C-1 1 AD MBB-BK 117 C-2 1 AD MBB-BK 117 D-2 1 AD MBB-BK 117 D-3 1 AD MD900 1 AD OH-13E 1 AD OH-13H 1 AD PZL W-3A 1 AD R22 1 AD R22 ALPHA 1 AD R22 BETA 1 AD R22 MARINER 1 AD R44 1 AD R44 II 1 AD R66 1 AD S-51 1 AD S-52 1 AD S-55 1 AD S-55B 1 AD S-55C 1 AD S-58A 1 AD S-58B 1 AD S-58BT 1 AD S-58C 1 AD S-58D 1 AD S-58DT 1 AD S-58E 1 AD S-58ET 1 AD S-58F 1 AD S-58FT 1 AD S-58G 1 AD S-58H 1 AD S-58HT 1 AD S-58J 1 AD S-58JT 1 AD S-61A 1 AD S-61D 1 AD S-61E 1 AD S-61L 1 AD S-61N 1 AD S-61NM 1 AD S-61R 1 AD S-61V 1 AD S-64A 1 AD S-64E 1 AD S-64F 1 AD S-70 1 AD S-70A 1 AD S-70C 1 AD S-70C(M) 1 AD S-70C(M1) 1 AD S-70M 1 AD S-76A 1 AD S-76B 1 AD S-76C 1 AD S-76D 1 AD S-92A 1 AD S62A 1 AD SA 3180-Alouette Astazou 1 AD SA 318B-Alouette Astazou 1 AD SA 318C-Alouette Astazou 1 AD SA-365C 1 AD SA-365C1 1 AD SA-365C2 1 AD SA-365N 1 AD SA-365N1 1 AD SA-366G1 1 AD SA.315B Alouette III 1 AD SA.316B Alouette III 1 AD SA.316C Alouette III 1 AD SA.319B Alouette III 1 AD SA330J 1 AD SA341G 1 AD SA342J 1 AD SE 3130-Alouette II 1 AD SE 313B-Alouette II 1 AD SE.3160 Alouette III 1 AD TH-1L 1 AD TH-28 1 AD UH-12 1 AD UH-12A 1 AD UH-12B 1 AD UH-12C 1 AD UH-12E 1 AD UH-12E-L 1 AD UH-12L 1 AD UH-12L4 1 AD UH-1E 1 AD UH-1L 1 AD AS-365N3 1 AD AS332L 1 AD AS332L1 1 AD AS332L2 1 AD AS350B2 1 AD AS350B3 1 AD EC135P1 1 AD EC135P2 1 AD EC135P2+ 1 AD EC225LP 1 AD 206 1 AD 206A 1 AD 206A-1 (OH-58A) 1 AD 206B 1 AD 206B-1 1 AD 206L 1 AD 206L-1 1 AD 206L-3 1 AD 206L-4 1 AD Auxiliary Fuel System 1 AD 172 1 AD 172A 1 AD 172B 1 AD 172C 1 AD 172D 1 AD 172E 1 AD 172F (USAF T-41A) 1 AD 172G 1 AD 172H (USAF T-41A) 1 AD 172I 1 AD 369D 1 AD 369E 1 AD 369F 1 AD 369FF 1 AD 500N 1 AD Hardpoint Assemblies 1 AD 369D 1 AD 369E 1 AD 369F 1 AD 369FF 1 AD 369H 1 AD 369HE 1 AD 369HM 1 AD 369HS 1 AD 500N 1 AD 600N 1 AD 369 1 AD 369A 1 AD MD3-160 1 AD 269C 1 AD 369D 1 AD

Recent ADs

2025-17-11 Recurring

final rule

Airworthiness Directives; MD Helicopters, LLC

Unsafe Condition: Cracked tail rotor (T/R) pedal support brackets, specifically magnesium cast brackets with part numbers 369A7505-7, 369A7505-8, 369A7505-14, or 369A7505-15, and aluminum cast brackets with part num...

Effective: Oct 10, 2025 Category: aircraft Compliance: Before further flight

Why matched: Airworthiness Directives; MD Helicopters, LLC

Technical illustration of a helicopter rotor hub assembly
Problem area Rotor system

2024-23-06 Recurring

final rule

Airworthiness Directives; MD Helicopters, LLC, Helicopters

Unsafe Condition: Seized and damaged roller bearing in the torque tube assembly, which could result in reduced controllability and subsequent loss of control of the helicopter.

Effective: Dec 24, 2024 Category: aircraft Compliance: Within 100 hours time-in-service (TIS) or within one year after the effective date of this AD, wh...

Why matched: Airworthiness Directives; MD Helicopters, LLC, Helicopters

2024-20-07 Recurring

final rule

Airworthiness Directives; Various Helicopters

Unsafe Condition: Difficulty pulling the emergency float kit activation handle installed on the pilot cyclic, and deficiencies in the installation of the cables on the emergency float kits.

Effective: Dec 5, 2024 Category: aircraft Compliance: Within 50 flight hours

Why matched: Airworthiness Directives; Various Helicopters

2023-11-07

final rule

Airworthiness Directives; Various Helicopters

Unsafe Condition: unsafe condition on these products.

Effective: Jun 22, 2023 Category: aircraft Compliance: Before further flight

Why matched: Airworthiness Directives; Various Helicopters

2022-05-10 Recurring

final rule

Airworthiness Directives; Goodrich Externally-Mounted Hoist Assemblies

Unsafe Condition: The overload clutch in the Goodrich externally-mounted hoist assemblies can fail, leading to in-flight loss of the hoist load, possibly resulting in injury to persons on the ground or in a hoisting...

Effective: Apr 20, 2022 Category: aircraft Compliance: Within 12 months of effective date

Why matched: Airworthiness Directives; Goodrich Externally-Mounted Hoist Assemblies

2021-22-11 Recurring

final rule

Airworthiness Directives; MD Helicopters Inc. (MDHI) Helicopters

Unsafe Condition: A report of a spiral crack in the pilot-to-copilot tail rotor torque tube (torque tube) that appears to have originated from a hole where the tail rotor torque tube control fitting attaches to the ...

Effective: Jan 10, 2022 Category: aircraft Compliance: Within 100 hours TIS after the effective date of this AD, or within 5 hours TIS or 30 days after ...

Why matched: Airworthiness Directives; MD Helicopters Inc. (MDHI) Helicopters

Technical illustration of a helicopter rotor hub assembly
Problem area Rotor system

2017-17-03 Recurring

final rule

Airworthiness Directives; Airbus SAS Airplanes

Unsafe Condition: cracking of the pocket radius, which could lead to in-flight decompression of the airplane and possible injury to the passengers.

Effective: Oct 5, 2021 Category: aircraft Compliance: Before further flight

Why matched: Airworthiness Directives; MD Helicopters, Inc., Helicopters

2020-18-20

final rule

Airworthiness Directives; MD Helicopters Inc. (MDHI), Helicopters

Unsafe Condition: Reports of leading edge abrasion strips manufactured by HTC departing the MR blades during flight. An investigation determined that the abrasion strips were manufactured from electroformed nickel, ...

Effective: Oct 28, 2020 Category: aircraft Compliance: Within 10 hours TIS and thereafter before the first flight of each day until the abrasion strip h...

Why matched: Airworthiness Directives; MD Helicopters Inc. (MDHI), Helicopters

2020-11-07

final rule

Airworthiness Directives; MD Helicopter Inc., Helicopters

Unsafe Condition: Failure of a bolt, which could result in loss of an M/R blade and subsequent loss of control of the helicopter.

Effective: Jun 30, 2020 Category: aircraft Compliance: Within 3 months of the effective date of this AD, or at the next overhaul of the M/R assembly, wh...

Why matched: Airworthiness Directives; MD Helicopter Inc., Helicopters

2020-06-11

final rule

Airworthiness Directives; MD Helicopters Inc. Helicopters

Unsafe Condition: a link assembly remaining in service beyond its fatigue life, which could result in failure of the link assembly, failure of M/R blade pitch control, and subsequent loss of helicopter control.

Effective: Apr 28, 2020 Category: aircraft Compliance: Within 100 hours time-in-service (TIS)

Why matched: Airworthiness Directives; MD Helicopters Inc. Helicopters

Technical illustration of an aircraft flight control surface and actuator
Problem area Flight controls

2019-05-04

final rule

Airworthiness Directives; MD Helicopters, Inc. (MDHI), Helicopters

Unsafe Condition: a crack in an MRB

Effective: Apr 17, 2019 Category: aircraft Compliance: Within 25 hours time-in-service, and thereafter at each 100-hour inspection or annual inspection,...

Why matched: Airworthiness Directives; MD Helicopters, Inc. (MDHI), Helicopters

2016-05-09

final rule

Airworthiness Directives; MD Helicopters, Inc. (MDHI) Helicopters

Unsafe Condition: Incorrectly positioned fuel pump wiring within the fuel tank interfering with the operation of the fuel quantity sensor float, causing an erroneous fuel quantity indication in the cockpit.

Effective: Apr 15, 2016 Category: aircraft Compliance: before further flight

Why matched: Airworthiness Directives; MD Helicopters, Inc. (MDHI) Helicopters

2016-04982

final rule

Airworthiness Directives; MD Helicopters, Inc. (MDHI) Helicopters

Unsafe Condition: Incorrect routing of the auxiliary fuel pump (fuel pump) wiring, which could result in an erroneous fuel quantity indication in the cockpit and subsequent fuel exhaustion and emergency landing.

Effective: Apr 15, 2016 Category: aircraft Compliance: Within 100 hours time-in-service

Why matched: Airworthiness Directives; MD Helicopters, Inc. (MDHI) Helicopters

2016-04-15

final rule

Airworthiness Directives; MD Helicopters Inc., Helicopters

Unsafe Condition: A pin remaining in service beyond its fatigue life, which could result in failure of a pin, loss of a main rotor blade, and subsequent loss of control of the helicopter.

Effective: Mar 31, 2016 Category: aircraft Compliance: Within 100 hours time-in-service (TIS) or during the next annual inspection, whichever occurs first.

Why matched: Airworthiness Directives; MD Helicopters Inc., Helicopters

Technical illustration of a helicopter rotor hub assembly
Problem area Rotor system

2016-01-19

final rule

Airworthiness Directives; MD Helicopters Inc.

Unsafe Condition: Rotating cone assembly remaining in service beyond its fatigue life, which could result in failure of the rotating cone assembly and loss of control of the helicopter.

Effective: Feb 25, 2016 Category: aircraft Compliance: Within 1 year or at the next annual inspection, whichever comes later.

Why matched: Airworthiness Directives; MD Helicopters Inc.

2014-16-01

final rule

Airworthiness Directives; MD Helicopters, Inc., Helicopters

Unsafe Condition: A cracked main rotor upper hub assembly (upper hub) could result in failure of the upper hub and subsequent loss of control of the helicopter.

Effective: Aug 20, 2014 Category: aircraft Compliance: Within the next 25 hours time-in-service (TIS) or at the next annual inspection, whichever occurs...

Why matched: Airworthiness Directives; MD Helicopters, Inc., Helicopters

Technical illustration of a helicopter rotor hub assembly
Problem area Rotor system

2013-20-16 Recurring

final rule

Airworthiness Directives; MD Helicopters, Inc. (MDHI) Helicopters

Unsafe Condition: Bolt failure, which could result in loss of main rotor blade structural integrity and subsequent loss of control of the helicopter.

Effective: Dec 5, 2013 Category: aircraft Compliance: Before further flight for daily checks and inspections, and within 300 hours time-in-service for ...

Why matched: Airworthiness Directives; MD Helicopters, Inc. (MDHI) Helicopters

Technical illustration of a helicopter rotor hub assembly
Problem area Rotor system

2013-19-24

final rule

Airworthiness Directives; MD Helicopters, Inc., Helicopters

Unsafe Condition: The tail rotor blade pitch horn separating from the tail rotor blade, leading to an unbalanced condition, vibration, loss of tail rotor pitch control, and loss of directional control of the helicop...

Effective: Dec 5, 2013 Category: aircraft Compliance: Within 60 days and thereafter at intervals not to exceed one year

Why matched: Airworthiness Directives; MD Helicopters, Inc., Helicopters

2013-06-51

final rule

Airworthiness Directives; Various Helicopter Models

Unsafe Condition: Failure of the overload clutch in Goodrich externally-mounted hoists, resulting in uncontrolled reeling-out of the cable and loss of load capacity.

Effective: Jul 15, 2013 Category: aircraft Compliance: Before the next flight involving a hoist operation.

Why matched: Airworthiness Directives; Various Helicopter Models

2013-05-16

final rule

Airworthiness Directives; Hughes Helicopters, Inc., and McDonnell Douglas Helicopter Systems (Type Certificate Is Currently Held by MD Helicopters, Inc.) Helicopters

Unsafe Condition: Too short an edge distance from an aft longeron rivet to the edge of a tailboom frame ring, which could result in failure of the tailboom and subsequent loss of control of the helicopter.

Effective: Apr 30, 2013 Category: aircraft Compliance: Within 6 months or 100 hours time-in-service, whichever occurs first.

Why matched: Airworthiness Directives; Hughes Helicopters, Inc., and McDonnell Douglas Helicopter Systems (Type Certificate Is Currently Held by MD Helicopters, Inc.) Helicopters

Technical illustration of a riveted aircraft structural panel and frame
Problem area Airframe structure

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