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Airworthiness Directives

 

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25

The FAA is adopting a new airworthiness directive (AD) for certain Sikorsky Model S-76A, B, C, and D helicopters. This AD requires inspecting the tail rotor drive shaft flange-to-shaft attachment hardware for correct assembly and correct torque of the fasteners.

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24

The FAA is adopting a new airworthiness directive (AD) for Bell Helicopter Textron Inc. Model 412 and 412EP helicopters with certain static inverters installed. This AD requires revising the Rotorcraft Flight Manual and installing a placard in full view of the pilot to limit flight to visual flight rules only and prohibit night operations.

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13

Although the investigation into a fatal accident involving an Enstrom Helicopter in Colorado late last month is ongoing, evidence has surfaced that has prompted the FAA to issue an emergency airworthiness directive with testing that must be carried out before any further flight. The AD affects Enstrom Model F-28A, 280, F-28C, F-28C-2, F-28C-2R, 280C, F-28F, F-28F-R, 280F, 280FX helicopters, all serial numbers; and Model 480 helicopters with serial numbers 5001 through 5006.

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10

The FAA is publishing a new airworthiness directive (AD) for Airbus Helicopters (formerly Eurocopter France) Model EC130T2 helicopters, which was sent previously to all known U.S. owners and operators of these helicopters. This AD requires repetitively inspecting the attachment points where the fan attaches to the main gearbox (MGB) oil cooler hopper (hopper) and replacing any cracked hopper with an airworthy hopper.

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08

The FAA is revising Airworthiness Directive (AD) 2014-12-11 for Sikorsky Aircraft Corporation Model S-92A helicopters. AD 2014-12-11 required revising the Rotorcraft Flight Manual (RFM) to include the appropriate operating limitations for performing Class D external load-combination operations. As published, AD 2014-12-11 referenced an incorrect date for Revision No. 12 of Sikorsky RFM SA S92A-RFM-003, Part 1.

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05

The FAA is adopting a new airworthiness directive (AD) for certain serial number (S/N) Lycoming Engines reciprocating engines. This AD was prompted by propeller governor shaft set screws coming loose due to improper installation. The FAA is issuing this AD to prevent the propeller governor shaft set screw from coming loose, causing damage to the engine and damage to the aircraft.

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02

The FAA is superseding airworthiness directive (AD) 2012-14-06 for certain Rolls-Royce Corporation (RRC) 250-C20, -C20B, and -C20R/2 turboshaft engines. AD 2012-14-06 required a one-time visual inspection and fluorescent-penetrant inspection (FPI) on certain 3rd-stage and 4th-stage turbine wheels for cracks in the turbine blades. This new AD replaces the one-time visual inspection and FPI with repetitive visual inspections and FPIs.

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02

The FAA is superseding Airworthiness Directive (AD) 2013-19-19 for certain Eurocopter France Model AS332C, AS332L, AS332L1, AS332L2, and EC225LP helicopters. AD 2013-19-19 required replacing certain serial-numbered main gearbox bevel gear vertical shafts and inspecting and replacing, if necessary, each shaft. This new AD requires the same actions as AD 2013-19-19 but corrects an error.

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15

The FAA is adopting a new airworthiness directive (AD) for Airbus Helicopters (previously Eurocopter France) Model EC155B1 and AS 365 N3 helicopters with a certain automated flight control system and with a Garmin global positioning system installed. This AD requires revising the Rotorcraft Flight Manual to prohibit using the autopilot coupled with a Localizer/Instrument Landing System or Very High Frequency Omnidirectional Range approach.

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07

The FAA is superseding Airworthiness Directive 2011-12-10 for Robinson Helicopter Company Model R22, R22 Alpha, R22 Beta, R22 Mariner, R44, and R44 II helicopters with certain main rotor blades installed. Actions are intended to detect debonding of the blade skin, which could result in blade failure and subsequent loss of control of the helicopter.

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