R44 Scheduled Maintenance

First 25 hours:

• Change oil and filter and inspect oil suction screen and filter per Lycoming SB480E.
• Check alternator belt tension per Lycoming Service Instruction  SI 1129.

Every 50 hours:

• Inspect and service engine per Lycoming Operator’s Manual, SL 1080,
• Change oil, oil filter, and inspect oil suction screen and removed filter per Lycoming SB480E.

First 100 hours

• Drain and flush gearboxes per Sections 1.120 1.130.
• Inspection: Check engine exhaust valve guide clearance per Lycoming SB388C.

Every 100 hours:

• Inspect per Section 2.400. Inspect and service engine per Lycoming Operator’s Manual, SB366, S11G8GB, SI1 1298, and SB342E (I0-540 only).
• As required, inspect and service TCM ignition components per TCM SB643B.

Every 300 hours:

• Lubricate C181-3 bearing per Section 1.140.
• Replace hydraulic filter per Section 1.170.
• Inspect valves and check engine exhaust valve guide clearance per Lycoming SB301B, S8388C, and Operator’s Manual.

Every 500 hours:

• Drain and flush gearboxes per Sections 1.120 1.130.
• Clean gearbox chip detectors per Section 1.115. Verify magneto drive cushion pliability.
• Service collective spring assembly (manual controls only) per Section 8.221.
• As required, inspect and service TCM ignition components per TCM SB658 and SB663A.

Every 2200 hours:

• Overhaul helicopter per Section 2.700.
• See R44 2200 Hour Inspection

Calendar

Every 4 months:

• Change oil, oil filter, and inspect oil suction screen and removed filter per Lycoming SB480E.

Every 12 months:

• Inspect per Section 2.400.
• Clean gearbox chip detectors per Section 1.1 15.
• Inspect emergency locator transmitter (ELT) per 14 CFR Part 91.207.
• Inspect optional pop-out floats per Section 5.630.

Every 24 months:

• Test and inspect transponder per 14 CFR Part 91.413.

Every 3 years:

• Lubricate C181-3 bearing per Section ’1.140.
• Inspect optional popout floats per Section 5.640.
• Hydrostatic test pressure cylinder.
• Every 4 years
• Overhaul TCM magnetos per TCM 886438. Verify magneto drive cushion pliability.

Every 12 years

• Perform 12-year inspection and limited overhaul per Section 2.600, or overhaul per Section 2.700.
• See 12 Year Inspection