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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

2013-03-03

final rule

Airworthiness Directives; MD Helicopters, Inc., Helicopters

Unsafe Condition: A decrease, over time, in the strength of a T-T strap caused by moisture, which could result in failure of a T-T strap, loss of directional control, and subsequent loss of control of the helicopter.

Effective: Mar 15, 2013 Category: aircraft Compliance: Within six months

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

2012-25387 Recurring

final rule

Airworthiness Directives; MD Helicopters, Inc.

Unsafe Condition: A crack in the main rotor lower hub assembly (lower hub). This condition could result in failure of the lower hub and subsequent loss of control of the helicopter.

Effective: Nov 27, 2012 Category: aircraft Compliance: Within 100 hours time-in-service (TIS) or during the next annual inspection, whichever occurs fir...

Why matched: Airworthiness Directives; MD Helicopters, Inc.

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

2012-21-01

final rule

Airworthiness Directives; MD Helicopters, Inc.

Unsafe Condition: A crack in the main rotor lower hub assembly could lead to failure of the lower hub and subsequent loss of control of the helicopter.

Effective: Nov 27, 2012 Category: aircraft Compliance: before further flight if a crack is found; otherwise, inspections must be conducted at 100-hour i...

Why matched: Airworthiness Directives; MD Helicopters, Inc.

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

2011-22-08

final rule

Airworthiness Directives; MD Helicopters, Inc. Model MD900 Helicopters

Unsafe Condition: Failure of the Vertical Stabilizer Control System (VSCS) tube adapter, part number 500N7218-1, could lead to loss of yaw control and subsequent loss of control of the helicopter.

Effective: Dec 13, 2011 Category: aircraft Compliance: Before further flight

Why matched: Airworthiness Directives; MD Helicopters, Inc. Model MD900 Helicopters

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

2011-14-05

final rule

Airworthiness Directives; MD Helicopters, Inc. Model MD900 Helicopters

Unsafe Condition: Incorrectly inserted flanged bushings in the main rotor lower hub assembly (lower hub) can result in local corrosion, leading to fatigue cracking.

Effective: Aug 1, 2011 Category: aircraft Compliance: Within 100 hours time-in-service (TIS) or during the next annual inspection, whichever occurs fir...

Why matched: Airworthiness Directives; MD Helicopters, Inc. Model MD900 Helicopters

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

2010-18-52

final rule

Airworthiness Directives; MD Helicopters, Inc. Model MD900 Helicopters

Unsafe Condition: Crack in the main rotor hub near the flex beam bolt hole locations, which could lead to hub failure and subsequent loss of control of the helicopter.

Effective: Dec 1, 2010 Category: aircraft Compliance: Within 4 hours time-in-service

Why matched: Airworthiness Directives; MD Helicopters, Inc. Model MD900 Helicopters

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

2010-06-06

final rule

Airworthiness Directives; MD Helicopters, Inc. Model MD-900 Helicopters

Unsafe Condition: Cracks in the swashplate spherical slider bearing (slider bearing) occurred well before the previously increased retirement life of 2,030 hours time-in-service (TIS) was reached, leading to potenti...

Effective: Apr 20, 2010 Category: aircraft Compliance: Within 100 hours TIS for serial number application; removal from service by specified TIS limits.

Why matched: Airworthiness Directives; MD Helicopters, Inc. Model MD-900 Helicopters

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

2009-07-13

final rule

Airworthiness Directives; MD Helicopters, Inc. Model MD900 (including the MD902 Configuration) Helicopters

Unsafe Condition: Failure to comply with the procedures in MDHI Mandatory Service Bulletin SB900-099 R1 may result in reduced anti-torque control during certain combinations of high gross weight, density altitude, a...

Effective: May 14, 2009 Category: aircraft Compliance: Within 30 days

Why matched: Airworthiness Directives; MD Helicopters, Inc. Model MD900 (including the MD902 Configuration) Helicopters

2008-22-53

final rule

Airworthiness Directives; MD Helicopters, Inc. Model MD900 Helicopters

Unsafe Condition: Failure of the left Vertical Stabilizer Control System (VSCS) adapter tubes on MD900 helicopters, leading to uncontrollable vertical stabilizer and reduced yaw control.

Effective: Dec 17, 2008 Category: aircraft Compliance: Before further flight

Why matched: Airworthiness Directives; MD Helicopters, Inc. Model MD900 Helicopters

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

2008-22-52

final rule

Airworthiness Directives; MD Helicopters, Inc. Model 500N and 600N Helicopters

Unsafe Condition: Failed adapter tubes may lead to loss of yaw control and subsequent loss of control of the helicopter.

Effective: Dec 15, 2008 Category: aircraft Compliance: Before further flight and within 45 days.

Why matched: Airworthiness Directives; MD Helicopters, Inc. Model 500N and 600N Helicopters

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

2008-20-05 Recurring

final rule

Airworthiness Directives; MD Helicopters, Inc. Model 600N Helicopters

Unsafe Condition: Failure of the tailboom attachment fittings due to insufficient inspection and maintenance procedures.

Effective: Oct 27, 2008 Category: aircraft Compliance: Before further flight.

Why matched: Airworthiness Directives; MD Helicopters, Inc. Model 600N Helicopters