Sometimes an aircraft or component has a safety problem that requires all other aircraft of the same type to be checked. To achieve that, the Director issues an airworthiness directive (AD). The CAA issues new and amended ADs monthly, but emergency ADs can be issued at any time.


Emergency EASA AD 2021-0223-E Glasflügel 304 (powered) gliders(external link)

Effective: 08 October 2021

Applicability: Glasflügel 304 S gliders, Glasflügel 304 eS and Glasflügel 304 MS powered gliders, all S/N.

This AD can be found on the EASA website(external link).


Emergency UK CAA AD G-2021-0010-E: Cameron Balloons Fuel Cylinders: ATA 28 - Fuel -Cylinder Quick Shut-off Valve Mounting Flange - Inspection / Replacement(external link)

Effective: 04 October 2021

Applicability: Fuel cylinders with P/N CB2901, CB2902 and CB2903 with a S/N listed in Appendix 1 of this AD, where the cylinder is fitted with a QSO valve (incorporating flanged adaptor P/N CB437 Issue F), and all P/N CB2901, CB2902 and CB2903 cylinders having a S/N not listed in Appendix 1 of this AD that have been fitted with a flanged adaptor P/N CB437 Issue F and released as spare parts under Invoice and Form 1 Numbers as listed in Appendix 2 of this AD.

Stainless Steel cylinders CB426, CB497, CB599, CB959, CB2088, V20, V30, V40; Titanium cylinders CB2380,CB2383, CB2385, CB2387, T30 (CY-050-A-001) and “Worthington” Aluminium cylinders CB250, may also be affected if fitted with CB437 flanged adaptors supplied on invoice and Form 1 numbers listed in Appendix 2 of this AD.

These fuel cylinders are known to be installed on, but not limited to, hot air balloons and airships manufactured by Cameron Balloons Ltd, Colt Balloons, Lindstrand Balloons Ltd (LBL), Lindstrand Hot Air Balloons Ltd, Sky Balloons, Thunder Balloons, Thunder & Colt, and Lindstrand Technologies Ltd.

This AD can be found on the UK CAA website(external link).                         


Emergency EASA AD 2021-0203-E: Austro Engine GmbH - E4 and E4P engines(external link)

Effective: 14 September 2021

Details: Model E4 and E4P engines, all S/N - High Pressure Pump (HPP) Inspection.

This AD can be found on the EASA website(external link).


Emergency FAA AD 2021-19-08: Robinson R44 and R44 II Helicopters - Tail Rotor Blades Inspection(external link)

Effective: 22 September 2021

Details: Robinson R44 and R44 II helicopters, all S/N, fitted with tail rotor blade P/N C029-3 with S/N 9410 through to 9909 inclusive.

This AD can be found on the FAA website(external link).


Emergency EASA AD 2021-0195: AIRBUS HELICOPTERS - AS 350 and EC 130 helicopters(external link)

Effective: 03 September 2021

Details: AS 350 B3 and EC 130 T2 helicopters, all S/N fitted with an ARRIEL 2D engine.

This AD can be found on the EASA website(external link).


Emergency EASA AD 2021-0191-E: AUSTRO ENGINE E4 and E4P engines(external link)

Effective: 20 August 2021

Details: Model E4 and E4P engines, all S/N.

This AD can be found on the EASA website(external link).


Emergency FAA AD 2021-14-12 Grumman AA-1 and AA-5 Series(external link)

Effective: 27 July 2021

Details: Grumman American AA-1, AA-1A, AA-1B, AA-1C and AA-5 aircraft, all S/N - Horizontal Stabilisers Inspection.

This AD can be found on the FAA website(external link).


Emergency FAA AD 2021-15-14 Bell UH-1 series helicopters(external link)

Effective: 30 August 2021

Details: Bell UH-1 series helicopters.

This AD can be found on the FAA website(external link).


Emergency FAA AD 2021-15-52 Various Restricted Category Helicopter(external link)

Effective: 12 July 2021

Details: Bell UH-1 series helicopters fitted with an outboard main rotor hub strap pin P/N 204-012-104-005 and a S/N with prefix “FNFS”.

This AD can be found on the FAA website(external link).


Emergency EASA AD 2021-0165-E Main rotor system Agusta Bell AB204B, AB205A-1 and AB212 helicopters(external link)

Effective: 09 July 2021

Details: Agusta Bell AB204B, AB205A-1 and AB212 helicopters fitted with an outboard main rotor hub strap pin P/N 204-012-104-005 and a S/N with prefix “FNFS”.

The AD can be found on the EASA website(external link).


Emergency FAA AD 2021-15-51 Main rotor system Bell 204B, 205A, 205A-1, 205B and 212 helicopters(external link)

Effective: 08 July 2021

Details: Bell 204B, 205A, 205A-1, 205B, and 212 helicopters fitted with an outboard main rotor hub strap pin P/N 204-012-104-005 and a S/N with prefix “FNFS”.

The AD can be found on the FAA AD webpage(external link).


Emergency EASA AD 2021-0144 Leonardo A109 helicopters(external link)

Effective: 01 July 2021

Details: Leonardo A109C, A109K2, A109E, A109S and AW109SP helicopters, all S/N.

The AD can be found on the EASA website(external link).


Emergency EASA AD 2021-0126 - AB212 helicopters(external link)

Effective: 24 May 2021

Details: AB212, all serial numbers.

The AD can be found on the EASA website(external link).


Emergency EASA AD 2021-0125-E GE AVIATION CZECH - M601 engines(external link)

Effective: 11 May 2021

Details: M601D, M601D-1, M601D-2, M601D-11, M601D-11NZ, M601E, M601E-11, M601E-11A, M601E-11AS, M601E-11S, M601E-21, M601F, M601FS, M601F-11, M601F-22, M601F-32, M601T and M601Z engines, all S/N.   These engines are known to be installed on, but not limited to, Aircraft Industries (formerly LET) L-410 series; Air Tractor AT-300, AT-400 and AT-500 series; Allied Ag Cat Productions Inc. (formerly Grumman) G-164 series; PZL "Warszawa-Okęcie" PZL-106 (Kruk) series; RUAG Aerospace Services (formerly Dornier) Do 28 series; Thrush Aircraft (formerly Quality, Ayres, Rockwell) S-2R series; and Viking Air Ltd. (formerly de Havilland Canada) DHC-3 (Otter) aeroplanes.

The AD can be found on the EASA website(external link).


Emergency EASA AD 2021-123-E Airbus AS 350 helicopters(external link)

Effective: 11 May 2021

Details: Tail Rotor Load Compensator - AS 350 B, AS 350 B2, AS 350 B3 and AS 350 BA helicopters, S/N 1241, 1525, 1601, 1708, 1825, 1910, 1973, 2056, 2072, 2361, 2394, 3170, 3223, 3479, 3789, 9005, 9010 and 9035.

The AD can be found on the EASA website(external link).


Emergency EASA AD 2021-0098 Flight Controls / Stabilizers – Aileron, Elevator and Rudder Hinge Bolt Installations – Inspection / Modification - effective 23 April 2021(external link)

Effective: 23 April 2021

Details: This AD is applicable to Pilatus PC-6 aeroplanes, all models and S/N.

The AD can be found on the EASA website(external link).


Emergency Transport Canada AD CF-2021-05R2 - effective 04 March 2021(external link)

Effective: 04 March 2021

Details: Pilot Collective Stick and Grip Assembly fitted on Bell 505 helicopters, S/N 65011 and subsequent.

The AD can be found on the Transport Canada website(external link).


Emergency EASA AD 2021-0052 GE AVIATION CZECH M601 engines - effective 03 March 2021(external link)

Effective: 03 March 2021

EASA AD 2021-0052 with effective date 3 March 2021 is applicable to M601D, M601D-1, M601D-11, M601D-11NZ, M601D-2, M601E, M601E-11, M601E-11A, M601E-11AS, M601E-11S, M601E-21, M601F, M601F-11, M601F-22, M601F-32, M601FS, M601T and M601Z engines, all S/N.

These engines are known to be installed on, but not limited to, Aircraft Industries (formerly LET) L-410 series and L-420; Air Tractor AT-300, AT-400 and AT-500 series; Allied Ag Cat Productions Inc. (formerly Grumman) G-164 series; PZL "Warszawa-Okęcie" PZL-106 (Kruk) series; RUAG Aerospace Services (formerly Dornier) Do 28 series; Thrush Aircraft (formerly Quality, Ayres, Rockwell) S-2R series; Viking Air Ltd. (formerly de Havilland Canada) DHC-3 Otter; Zlin Aircraft Z-37T series; and PAC FU-24 aeroplanes.

EASA AD 2021-0052 is prompted by reports of finding propeller shaft P/N M601-6081.6 installed on M601D, M601D-11NZ, M601D-2, M601F and M601Z engines.

This P/N propeller shaft is not approved for installation on these engine models, and no overhaul/life limits are published in the applicable ALS for these engines.

It was also determined that the applicable life limit is not yet published in the applicable ALS for M601E family engines, for which that propeller shaft is eligible for installation.

Finally, it was reported that some data, which can be used to determine the accumulated life of certain propeller shafts, may have not been provided to operators, so the propeller shafts life limit may not have been implemented properly.

These conditions, if not corrected, may result in failure of a propeller shaft, possible detachment of the propeller, damage to the engine and/or the aircraft, and reduced aircraft control.

For the reasons described above, this AD requires implementation of the applicable life limit and replacing each propeller shaft with a serviceable propeller shaft.

The EASA AD can be obtained from the EASA website(external link).


EASA AD 2021-0042 Hot Air Balloons(external link)

Effective: 12 February 2021

Details: All balloon types and models, all S/N, as specified in the following TCDS and Specific Airworthiness Specification (SAS):

Austria BA 009-ACG, EASA.BA.003, EASA.BA.010, EASA.BA.012, EASA.BA.013, EASA.BA.014, EASA.BA.015, EASA.BA.016, EASA.BA.019, EASA.BA.021, EASA.BA.022, EASA.BA.025, EASA.BA.026, EASA.BA.028, EASA.BA.030, EASA.BA.119,EASA.BA.517, EASA.SAS.BA.012, EASA.SAS.BA.023 and EASA.SAS.BA.025.

Manufacturers include: 114 (714) ZO Svazarmu, Aviatik Klub, Aerotechnik P.O.S., Aerotechnik s.r.o, Aerotechnik Podnik ÚV Svazarmu, Altisph’air, Annonay Air Concept, Ballons Libert Sprl, Ballons Chaize, Ballonservice & Technik, Balóny Kubíček spol. s.r.o., Cameron Balloons Ltd, Colt Balloons, Firma Johann Schön, Kubíček spol. s.r.o., Lindstrand Balloons Ltd (LBL), Lindstrand Hot Air Balloons Ltd, Llopis Balloons, Notheisz Balloons Hungary Kft., Pilatre De Rozier S.I.G.A. S.A., Theo Schroeder fire balloons GmbH, Sky Balloons, SUP-AIR Ballon Egyesület, Thunder Balloons, Thunder & Colt, Ultramagic S.A., Lindstrand Technologies Ltd.

Note: This list of manufacturers (some companies no longer exist) may not be complete due to lack of historical data. If a balloon manufacturer’s name is not listed, that does not mean that this AD does not apply to that balloon – refer to EASA AD 2021-0042 for further information.

The EASA AD can be obtained from the EASA AD webpage(external link).


FAA AD 2020-22-07 Bell 412 Helicopters(external link)

Effective: 18 November 2020

Details: FAA AD 2020-22-07 with effective date 18 November 2020 is applicable to:

  • Model 412 helicopters with S/N 33001 through to 33107 inclusive, S/N 33108 through 33213 inclusive, S/N 34001 through 34024 inclusive, or S/N 36001 through 36019 inclusive;
  • Model 412 helicopters with S/N 36020 through 36086 inclusive;
  • Model 412EP helicopters with S/N 36087 through 36999 inclusive, S/N 37002 through 37999 inclusive, S/N 38001 through 38999 inclusive, or S/N 39101 through 39999; and
  • Model 412CF helicopters, all S/N.

This FAA AD is prompted by an overseas accident and multiple reports of finding cracked main gearbox (MGB) support cases.  The FAA is issuing this AD to address excessive pylon pitch vibrations. The unsafe condition, if not addressed, could result in structural failure of the MGB support case and subsequent reduced control of the helicopter. This AD requires revising the helicopter AFM.

The FAA AD can be obtained from the FAA AD webpage(external link).


EASA AD 2020-0224-E AS 350 and AS 355 helicopters(external link)

Effective: 20 Oct 2020

Details: EASA AD 2020-0224-E with effective date 20 October 2020 is applicable to AS 350 B, AS 350 BA, AS 350 BB, AS 350 B1, AS350 B2 and AS 350 D helicopters, all S/N; and AS 355 E, AS 355 F, AS 355 F1, AS 355 F2 and AS 355 N helicopters, all S/N.

This AD is prompted by two recent occurrences reported to EASA of finding large debonding of TRB leading edge (LE) protection shields.

The design and assembly procedure of the affected part is such that rapid debonding can occur if humidity/liquid water reaches the bonding surface between LE and blade spar.

This condition, if not detected and corrected, could result in loss of tail rotor control and possible loss of helicopter control.

To address this potential unsafe condition, Airbus Helicopters issued an applicable ASB to provide inspection instructions.

For the reason described above, this AD requires repetitive inspections of the affected parts and, depending on findings, replacement.

This AD also requires modification of the helicopter with the installation of serviceable parts, and prohibits (re)installation of affected parts.

The EASA AD can be obtained from the EASA website(external link).


EASA AD 2020-0217-E AS 350 and AS 355 helicopters (external link)

Effective: 08 Oct 2020

Details: AS 350 B, AS 350 BA, AS 350 B1, AS 350 B2 and AS 350 D helicopters, all S/N and AS 355 E, AS 355 F, AS 355 F1 and AS 355 F2 helicopters, all S/N - Cyclic Stick Grip Up/Down Hoist Control Switch.

EASA AD 2020-0217-E with effective date 8 October 2020 is applicable to AS 350 B, AS 350 BA, AS 350 B1, AS 350 B2 and AS 350 D helicopters, all S/N and AS 355 E, AS 355 F, AS 355 F1 and AS 355 F2 helicopters, all S/N.

Affected part: UP/DOWN switches for rescue hoist control, installed on DUNLOP cyclic stick grips P/N AC66444.

The applicable ASB: Airbus Helicopters (AH) AS350 Emergency Alert Service Bulletin (ASB) 01.00.72 and AS355 ASB 01.00.58 (single document).

This AD is prompted by a report of an unintended release of the rescue hoist hook on an AS 350 B2 helicopter during a ground check. The operator was using the affected part, when the hoist’s electrically-actuated cable cutter function was activated.

This condition, if not corrected, could result in events of inadvertent activation of the rescue hoist cable cutter function and consequent detachment of an external load, or person from the helicopter hoist, possibly resulting in personal injury, or injury to persons on the ground.

To address this potential unsafe condition, AH has issued an ASB to introduce an operational limitation.

For the reason described above, this AD requires installation of a dedicated placard in the cockpit, prohibits the in-flight use of the affected part, and amends the applicable Rotorcraft Flight Manual (RFM).

This AD is considered to be an interim action and further AD action may follow.

The EASA AD can be obtained from the EASA website(external link).


EASA AD 2020-0206 - A119 and AW119MKII helicopters(external link)

Effective: 14 Oct 2020

Details: A119 and AW119MKII helicopters, all S/N – Gearbox Output Shaft.

EASA AD 2020-0206 with effective date 14 October 2020 supersedes EASA AD 2018-0156 and is applicable to A119 and AW119MKII helicopters, all S/N.

Affected parts: 90° tail rotor gearbox (TGB) shafts with P/N 109-0443-03-107 (installed on TGB P/N 109-0440-06-01-101, or P/N 109-0440-06-105), and a S/N as listed in Appendix 1 of this AD.

The AD is prompted by two reported occurrences of finding corrosion in the internal surface of the 90° TGB shaft on A119 helicopters. Further analysis identified a specific batch of parts that may be susceptible to similar occurrences.

Prompted by this occurrence, and pending further information from the technical investigation, Leonardo issued SB 119-090 (original issue), providing inspection instructions, and EASA issued AD 2018-0156 to require repetitive inspections of affected parts and, depending on findings, replacement of the 90° TGB.

Since that AD was issued, it has been determined that additional parts may be susceptible to similar occurrences. Furthermore, it was observed that it cannot be excluded that some TGB shafts could have been reinstalled on a TGB other than the one on which they were initially installed. Consequently, Leonardo issued a revised SB, expanding the list of affected parts and updating the instructions.

For the reasons stated above, this AD retains the requirements in superseded EASA AD 2018-0156, and expands the population of affected parts.

This AD is still considered an interim action and further AD action may follow.

The EASA AD can be obtained from the EASA website(external link).


FAA Emergency AD 2020-18-20 MDHI 369 Helicopters(external link)

Effective: 28 Oct 2020

Details: MD Helicopters 369 series, 500N and 600N Helicopters, including Kawasaki-Hughes 500 and 500D Helicopters – Main Rotor Blade (MRB) Leading Edge Abrasion Strip

FAA AD 2020-18-20 with effective date 28 October 2020 and a 10 hour TIS initial compliance is applicable to MDHI 369A, 369D, 369E, 369FF, 369H, 369HE, 369HM, 369HS, 500N, 600N helicopters including Kawasaki-Hughes 500 and 500D helicopters fitted with a MRB P/N 500P2100-105, P/N 500P2100-305, P/N 500P2300-505, P/N 369D21120-505, P/N 369D21121-505, or P/N 369D21123-505 with a 1.25 inch chord length nickel abrasion strip (abrasion strip) manufactured, or installed by Helicopter Technology Company, LLC (HTC), or where the manufacturer of the abrasion strip is unknown.

This AD does not apply if the abrasion strip has accumulated 700 or more hours TIS.

This AD is prompted by reports of abrasion strips departing from MRBs in flight. The AD requires a tap inspection of each MRB leading edge abrasion strip. The FAA is issuing this AD to address an unsafe condition on these products.

The FAA AD can be obtained from the FAA AD webpage(external link).


EASA AD 2020-0199 Cabri G2 helicopters (Correction)(external link)

Effective: 05 Oct 2020

Details: Cabri G2 helicopters, all S/N.

EASA AD 2020-0199 (Correction) with effective date 5 October 2020 and a compliance of 30 days, or 30 hours TIS, whichever occurs first, is applicable to Cabri G2 helicopters, all S/N.

This EASA AD is re-issued to correct the P/N of the affected part, which is P/N G12-00-200 and not P/N G12-10-200.

The EASA AD is prompted by an overseas occurrence of finding a crack in a rotating scissors fitting during maintenance.

The suspected cause for the cracking is corrosion under residual stress.

This condition, if not detected and corrected, could result in failure of the rotating scissors and loss of helicopter control.

To address this potential unsafe condition, Helicopters Guimbal (HG) has issued SB 20-012, Revision A, with detailed initial inspection instructions and HG SB 20-011, Revision B, with repetitive inspection instructions.

The EASA AD can be obtained from the EASA website(external link).


EASA AD 2020-0201R1 - GE Aviation Czech - M601/H80 engines(external link)

Effective: 02 Oct 2020

Details: GE Aviation Czech (formerly Walter Engines) M601D, M601D-1, M601D-11, M601D-11NZ, M601E, M601E-11, M601E-11A, M601E-11AS, M601E-11S, M601E-21, M601F, M601F-22, M601F-32, M601FS, M601T, H75-200, H80-100, H80-200 and H85-200 engines, all S/N.

EASA AD 2020-0201R1 with effective date 2 October 2020 is revised to correct an affected FCU S/N.

Since EASA AD 2020-0202 was issued, it was determined that a FCU S/N was incorrectly specified in the GE Aviation Czech ASB and subsequently also incorrectly quoted in the EASA AD.

GE Aviation Czech has revised the ASB to Revision 1, dated 24 September 2020 to correct the FCU S/N error and the EASA AD revised to amend Appendix 1 in the AD accordingly.

GE Aviation Czech ASB-H75-73-00-00-0038, ASB-H80-73-00-00-0074, ASB-H85-73-00-00-0032, ASB-M601D-73-00-00-0066, ASB-M601E-73-00-00-0097, ASB-M601F-73-00-00-0050 and ASB-M601T-73-00-00-0040 (single document) original issue dated 18 September 2020, and Revision 1 dated 24 September 2020 pertains to the subject of the revised AD.

The AD is prompted by several occurrences of engine power fluctuations reported during ground tests on engines fitted with an affected part. The investigation results determined that one or more rubber cuff sealings of the cage reinforcement inside the main metering valve of the FCU was incorrectly installed, which reduced the cuff ability to properly seal the FCU working pressure. This condition, if not corrected, may result in an engine surge, fluctuations, or loss of engine power, which could result in loss of aircraft control.

The EASA AD can be obtained from the EASA website(external link).

 

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