Airworthiness Directives

Fuel Selector Valve — Inspection and Replacement

Within next 100 hours time-in-service or 12 months, whichever occurs first

Carburetor Heat Box — Structural Inspection

Within next 50 hours time-in-service

Main Rotor Blade — Mandatory Replacement at Reduced TBO

Before reaching 1,800 hours TIS or at next scheduled 100-hour inspection, whichever occurs first

Tail Rotor Pitch Link — Inspection

Within next 25 hours time-in-service, then at every 100-hour inspection

Carburettor Float Chamber — Inspection for Cracks

Within next 50 hours time-in-service

Engine Thrust Reverser Sleeve — Structural Inspection

Within next 500 flight cycles

Emergency Exit Row Seat Track — Corrosion Inspection

At next C-check or within 6,000 flight hours, whichever is earlier

Wing Rib Feet — Repetitive Inspection

Repetitive inspection every 1,500 flight cycles

Horizontal Stabiliser Trim Actuator — Torque Check

Within next 3 months or 1,500 flight hours, whichever occurs first

Elevator Control Cable — Inspection for Wear

Within next 200 hours time-in-service, then every 500 hours

Fuel System Vent — Blockage Inspection

Within next 30 days

Nose Landing Gear Fork — Crack Inspection

Within next 100 hours time-in-service

Elevator Trim Cable Pulley Bracket — Fatigue Inspection

At next annual inspection or within 12 months, then annually

Engine Compressor — FOD Inspection after Dust Storm Operations

Within 10 hours following operation in known dust storm conditions

Filler Cap Retention Mechanism — Replacement

Before 30 November 2022 or within 50 hours, whichever is earlier

Propeller Blade — Erosion Inspection

Within 200 flight hours, then every 600 flight hours

Landing Gear Actuation System — Hydraulic Hose Replacement

Before accumulating 12 years since date of manufacture of the hose assembly

Pressurisation System Outflow Valve Actuator — Inspection

Within next 300 flight hours, then every 1,000 flight hours

PT6A Engine Oil Line Fitting — Crack Inspection

Before next flight after effective date, then at each 100-hour inspection

Fuselage Crown Stringer — Disbond Inspection

Within next 500 flight cycles, then every 2,000 flight cycles

Fuel Strainer Bowl — Sealant Replacement

Within next annual inspection or 12 months, whichever occurs first

Wing Strut Fitting — Fatigue Crack Inspection

Within next 250 hours time-in-service

Tail Rotor Drive Shaft Coupling — Reduced TBO and Recurring Inspection

Replacement at 1,500 hours TIS (reduced from 3,000 hours) and inspection every 300 hours

Main Rotor Head — Bearing Inspection

Within next 100 flight hours

Engine Mount Attachment — Crack Inspection

Within next 50 hours time-in-service, then every 200 hours

Engine Anti-Ice System Sensor — Verification

Within 150 flight cycles after effective date

Ejection Seat Safety Pin Configuration — Procedural Compliance

Immediate — applicable to all PC-21 operators

Wing Spar Cap — Corrosion Inspection

Within next 100 hours time-in-service or 12 months, whichever is earlier

Elevator Horn Bracket — Fatigue Crack Inspection

Within next 200 hours time-in-service, then every 500 hours

Retractable Landing Gear Actuator — Seal Replacement

Within next annual inspection or 200 hours time-in-service, whichever is earlier

Fuel Return Line — Inspection for Chafing

Within next 50 hours time-in-service

Austro Engine Gearbox Mount — Torque Recheck

Within next 25 hours time-in-service

Nose Wheel Fork — Crack Inspection after Hard Landing

Before next flight after hard landing exceeding 3.0G

Right Engine Exhaust Stack — Weld Inspection

Within next 50 hours time-in-service, then at every 100-hour inspection

Main Rotor Blade Retention Strap — Inspection

Within next 50 flight hours, then every 100 flight hours

Main Rotor Teeter Stop Bumpers — Replacement at Reduced Interval

Replacement at 1,200 hours TIS (reduced from 2,200 hours) or before next flight if any degradation is found

Overhead Stowage Bin Latch — Structural Inspection

Within next 6 months or 3,000 flight cycles, whichever is earlier

MCAS Software — Update to Version 5.2.2

Before accumulating 500 flight cycles after effective date

Passenger Oxygen System Bottle — Hydrostatic Test

Before next bottle hydrostatic test date or within 6,000 flight hours, whichever is earlier

Landing Gear Wheel Well Door Actuator — Inspection

Within 1,000 flight cycles of effective date, then every 2,000 flight cycles

Fuel Tank Inerting System — Nitrogen Generation Unit Inspection

Within next 1,500 flight hours, then every 3,000 flight hours

CFM LEAP-1A Engine Fan Case — Acoustic Panel Inspection

Within next 300 flight cycles

Ram Air Turbine Deployment Mechanism — Function Test

Within next 1,000 flight hours, then every 2,000 flight hours

Propeller De-Ice Boot — Delamination Inspection

Within next 100 hours time-in-service, then every 500 hours

Windscreen Heating Circuit — Wiring Inspection

Within next 300 flight hours

Main Landing Gear Leg — Fatigue Life Reduction

Replace before accumulating 12,000 landings (reduced from 20,000)

Ice Detector System — Software Update

Within next 200 flight hours after effective date

CT7 Engine Fuel Control Unit — Contamination Inspection

Within next 100 flight hours, then every 500 flight hours

Horizontal Stabiliser Trim Actuator — Thread Wear Inspection

Within next 1,000 flight hours, then every 2,000 flight hours

Main Rotor Gearbox Chip Detector — Wire Harness Inspection

Within next 25 flight hours

Tail Rotor Pitch Change Mechanism — Bearing Inspection

Within next 100 flight hours, then at every 200-hour inspection

Tail Rotor Gearbox — Oil Level Indicator Inspection

Within next 50 flight hours, then at every 100-hour inspection

Tailboom Attachment Fitting — Corrosion Inspection

Within next 100 flight hours, then annually

Hydraulic System Fluid Sampling — Contamination Check

At every 300-hour inspection

PT6A Engine Compressor Wash — Interval Reduction

Compressor wash every 100 flight hours (reduced from 200 hours)

Wing Strut Attachment Bolt — Fatigue Inspection

Within next 100 hours time-in-service, then at every annual inspection

Fuel System Gascolator — Drain Valve Inspection

At each 100-hour inspection and annual

Elevator Control Rod End — Replacement

Within next 200 hours time-in-service or 24 months, whichever occurs first

CAPS Parachute — Pyrotechnic Cartridge Replacement

Before the cartridge expiry date or within next 200 days, whichever is earlier

Continental IO-360 Exhaust System — Crack Inspection

At each 100-hour inspection, then annually

Fuel Tank Sealant — Inspection for Delamination

At next annual inspection or within 12 months, then annually

Main Landing Gear Retraction Actuator — Inspection for Internal Corrosion

Within next 100 hours time-in-service, then every 200 hours

Propeller Pitch Change Mechanism — Inspection

Within next 250 flight hours, then every 750 flight hours

Landing Gear Nose Gear Actuator — Lock Pin Inspection

Within next 100 hours time-in-service

Wing Attach Bolts — Torque Inspection and Re-torque

At next annual inspection or within 12 months, then at every annual inspection

Rudder Control Cable — Inspection for Corrosion

Within next 100 hours time-in-service, then annually

Fuselage Frame Station 727 — Corrosion Inspection

At next C-check or within 5,000 flight cycles, whichever is earlier

PT6A-34AG Engine — Turbine Inlet Temperature Thermocouple Harness Inspection

Within next 100 hours time-in-service or 6 months, whichever occurs first

Fuel Selector Valve — Actuator Retention Bolt Inspection

Within next 50 hours time-in-service

CAPS Rocket Harness — Mandatory Replacement

Within next 12 calendar months or at 10-year harness age limit, whichever occurs first

Tail Rotor Drive Shaft — Hanger Bearing Inspection

Within next 25 hours time-in-service, then at every 100-hour inspection

Engine Firewall Sealant — Inspection and Reapplication

At next scheduled 200-hour inspection