Servicing

Line maintenance servicing includes replacing fluids, lubricating components, and inspecting the helicopter and its components to maintain their serviceability.

Scheduled Maintenance Checks

The following is a list of the manufacturer recommended scheduled maintenance checks and inspections that may be carried out in the line maintenance environment.

Refer to Dimensions and Areas for the identification and complete description of the zones.

25 flight hours inspection

Task type	Task description	Procedure/Data
FNC	Do an engine power check.	Power Assurance Check (PAC)

50 Flight Hours Inspection

Task type	Task description	Procedure/Data
LUB	Lubricate the main rotor grips.	Lubricating the main rotor grips
LUB	Lubricate the trunnion bearings.	Lubricating the trunnion bearings
LUB	Lubricate the bearing of the pillow block assemblies.	Lubricating the pillow block assemblies
LUB	Lubricate the swashplate and support assembly (duplex bearing).	Lubricating the duplex bearing

50 Flight Hours / 1 Year Inspection

Complete the following tasks each 50 hours of operation time or 1 year, whichever occurs first.

Task type	Task description	Procedure/Data
LUB	Lubricate the needle bearings of the tail rotor hub assembly.	Lubricating the needle bearings
DET	Only applicable to P/N SLS- 030-910-109. Do a detailed inspection of the restraint assembly.	50 flight hours/1 year inspection

100 Flight Hours Inspection

Task type	Task description	Procedure/Data
FNC	Do a torque check of the pillow block assemblies attaching hardware.	100 flight hours inspection
LUB	Lubricate the tail rotor pitch change mechanism.	Lubricating the pitch change mechanism
DET	Do a detailed inspection of the bellcrank assembly spherical bearings.	100 flight hours inspection

100 Flight Hours / 6 Months Inspection

Complete the following task each 100 hours of operation time or 6 months, whichever occurs first.

Task type	Task description	Procedure/Data
DET	Do a detailed inspection of the main driveshaft.	100 flight hours/6 months inspection

100 Flight Hours / 1 Year Inspection

Complete the following task each 100 hours of operation time or 1 year, whichever occurs first.

Task type	Task description	Procedure/Data
SDI	Do a special detailed inspection of the main rotor blades.	100 flight hours/1 year inspection

The following tasks are only applicable if the hydraulic pump P/N M206-20H030-043 is installed for the first time or replaced.

Task type	Task description	Procedure/Data
DIS	Drain and discard the hydraulic fluid and the hydraulic pressure filter element.	Restoring/replacing the hydraulic pressure filter element

100 Flight Hours / 18 Months Inspection

Task type	Task description	Procedure/Data
DET	Do a detailed inspection of the left and right Liquid Inertia Vibration Eliminator (LIVE) mount unit.	100 flight hours/18 months inspection

150 Flight Hours Inspection

Task type	Task description	Procedure/Data
DET	Do a detailed inspection of the pump driveshaft assembly.	150 flight hours inspection

200 Flight Hours Inspection

Task type	Task description	Procedure/Data
LUB	Lubricate the crew seat positioning mechanism.	Lubricating the crew seat positioning mechanism
DET	Do a detailed inspection of the locking pins.	200 flight hours inspection
GVI	Do a general visual inspection of the seat tracks.	200 flight hours inspection
OPC	Do the FOPS test.	Flame Out Protection System (FOPS) test

300 Flight Hours Inspection

Task type	Task description	Procedure/Data
DET	Do a detailed inspection of the tail damper assembly.	Do a detailed inspection of the tail damper assembly as follows:
DIS	Discard and replace the HRFM filter element.	Replacing the HRFM filter element
GVI	Do a general visual inspection of the hydraulic pressure line (from filter) and suction line (from HRFM).	Do a general visual inspection of the hydraulic pressure line (from filter) as follows:
RST	Restore the hydraulic pressure filter element by cleaning.	Restoring/replacing the hydraulic pressure filter element
DET	Do a detailed inspection of the crew doors.	Do a detailed inspection of the crew doors as follows:
DET	Do a detailed inspection of the clamshell door.	Do a detailed inspection of the clamshell door as follows:
DET	Do a detailed inspection of the pivot sleeve assembly.	Do a detailed inspection of the pivot sleeve assembly as follows:
DET	Do a detailed inspection of the support assembly.	Do a detailed inspection of the support assembly as follows:
DET	Do a detailed inspection of the collective lever assembly.
DET	Do a detailed inspection of the idler assembly.
DET	Do a detailed inspection of the inner ring assembly.
FNC	Do an inspection and a functional check of the drive lever assembly, idler link assembly, and collar set swashplate drive assembly.
DET	Do a detailed inspection of the duplex bearing of the swashplate and support assembly.
FNC	Do a functional check (tilt friction check) of the swashplate and support assembly.
DET	Do a detailed inspection of the slide bearing assemblies.
DET	Do a detailed inspection of the outer ring assembly.
DET	Do a detailed inspection of the pitch link assemblies.
FNC	Do a functional check of the swashplate and support assembly (outer ring assembly).
FNC	Do a functional check (pressure check) of the nitrogen in the Liquid Inertia Vibration Eliminator (LIVE) mount units.
OPC	Do an operational check of the transmission and freewheel chip detectors.
SVC	Do a fluid level check of the rotor brake system and service if necessary, if installed.
FNC	Do a functional check (dynamic balance) of the tail rotor.
GVI	Do a general visual inspection of the crosshead, pitch link assemblies, pitch change mechanism, and tail rotor control tube.
GVI	Do a general visual inspection of the forward driveshaft.
GVI	Do a general visual inspection of the fan shaft assembly.
GVI	Do a general visual inspection of the aft driveshaft.
GVI	Do a general visual inspection of the driveshaft segments.
GVI	Do a general visual inspection of the forward adapter.
GVI	Do a general visual inspection of the aft adapters.
FNC	Do a functional check (torque check) of the attaching hardware of the disc packs of the forward driveshaft.
DET	Do a detailed inspection of the disc packs of the forward driveshaft.
FNC	Do a functional check (torque check) of the attaching hardware of the disc packs of the aft driveshaft and the driveshaft segments.
DET	Do a detailed inspection of the disc packs of the aft driveshaft and the driveshaft segments.
FNC	Do a functional check (torque check) of the attaching hardware of the tail rotor gearbox.
OPC	Do an operational check of the tail rotor gearbox indicating system.
GVI	Do a general visual inspection of the forward cable assemblies.
GVI	Do a general visual inspection of the aft cable assemblies.
FNC	Do a functional check (tension check) of the cables assemblies.
DET	Do a detailed inspection of the forward left and right mounts and the aft mount of the engine.
GVI	Do a general visual inspection of the oil cooler assembly.

300 Flight Hours / 1 Year Inspection

Task type	Task description	Procedure/Data

400 Flight Hours Inspection

Task type	Task description	Procedure/Data
FNC	Do a fuel flow check of the left and right injector half-manifolds.

400 Flight Hours / 1 Year Inspection

Task type	Task description	Procedure/Data

500 Flight Hours Inspection

Task type	Task description	Procedure/Data
RST	Restore the starter generator by replacing the brushes.
DET	Do a detailed inspection of the restraint assembly of the crew seats.
GVI	Do a general visual inspection of the crew seat cushions.