Global Regulatory Update, April 2-8, 2023

Australia’s Civil Aviation Safety Authority has issued airworthiness bulletin 02-002 Issue 3–28, making recommendations on installation and maintenance of emergency locator transmitters. 

EASA has issued airworthiness directive 2023-0068 for Airbus A350-941s, requiring replacement of center wing box fasteners, effective April 13, 2023. 

EASA has issued proposed airworthiness directive 23-038 for CFM Leap 1As, requiring replacement of forward outer seal, high pressure compress or stages 6-10 compressor rotor spools and high pressure turbine rotor stage 1 disks, effective 14 days after airworthiness directive is issued. 

EASA has issued proposed airworthiness directive 23-039 for CFM Leap 1Bs, requiring replacement of forward outer seal, high pressure compressor stages 6-10 compressor rotor spools and high pressure turbine rotor stage 1 disks, effective 14 days after airworthiness directive is issued. 
 

FAA has issued airworthiness directive 2023-06-06 for all MHI RJ Aviation regional jets, revising the maintenance or inspection program to incorporate two aircraft maintenance manual tasks, effective April 28, 2023.

FAA has issued airworthiness directive 2023-04-11 for certain GE CF6-45s and -50s with a specified low-pressure turbine rotor stage 3 disk installed, requiring inspections of high-pressure and low-pressure turbine rotor stage 1 and stage 2 blades, vibration surveys and use of a lower life limit for certain low-pressure rotor stage 3 disks; and, as terminating action, removal and replacement of the low-pressure turbine rotor stage 3 disk with a redesigned rotor stage 3 disk. Further, this directive revises the compliance time of the drawdown plan for removal and replacement of the rotor stage 3 disk and prohibits installation or reinstallation of certain rotor stage 3 disks, effective April 28, 2023.

FAA has issued airworthiness directive 2023-04-17 for certain Boeing 737-8s, -9s, -600s, -700s, -700Cs, -800s, -900s and -900ERs, requiring inspecting the auxiliary power unit fuel line shroud for damage, inspecting the pressure switch wire clamp for correct bolt orientation and horizontal distance from the fuel line shroud and applicable on-condition actions, effective May 1, 2023. 
 

FAA has issued airworthiness directive 2023-03-20 for all Boeing 747-400s, -400Ds and -400Fs, revising the maintenance or inspection program to incorporate new or more restrictive airworthiness limitations, effective May 1, 2023. 

FAA has issued airworthiness directive 2023-06-10 for all Boeing 737-8s, -8200s and -9s, requiring an inspection or records review to determine the serial number of each engine inlet and, if a certain engine inlet is found, an inspection of the engine anti-ice exhaust duct fasteners to determine the gap spacing and if all fasteners are installed; applicable related investigative and corrective actions; and part marking, effective April 11, 2023.