Internal Structure EO C Attach Fittings & Structure 10,000 F Note 11 Stabilizers and Stabilizer Control Surfaces, Chapter 55 10,000 A B C D E F Exterior Surfaces, Stabilizers OC A B C Interior Structure, Stabilizers 10,000 E Note 9 Exterior Control Surfaces OC A C Interior Control Surface Structure 10,000 E Note 9 Attach Fittings & Hinges 10,000 F Note 9 Effective date ____________________ Page 5 of 6
OPERATIONS SPECIFICATIONS
AIRCRAFT MAINTENANCE
SHORT TURBO-SKYVAN
OVERHAUL INSPECTION AND CHECK PERIOD HRS. OR YRS. PERIODIC OTHER Windows, Chapter 56 10,000 A B C D E F DV Window Lock Mechanism OC A C Wings, Chapter 57 10,000 A B C D E F Exterior Surfaces OC A B C Interior Structure 10,000 F Note 9 Wing Strut Exterior Surface OC A B C Wing Strut Internal 10,000 F Note 9 Wing Fuselage Attachments 10,000 F Note 11 Attachment Strut/ Wing 10,000 C Note 11 Aileron & Tab Exterior Surfaces OC A B C Aileron & Tab Internal
Structure 10,000 E Note 9 Flaps Exterior Surface OC A B C Flaps Interior Structure 10,000 E Note 9 All Hinges & Brackets 10,000 A C Note 9 Propeller, Chapter 61 750 A B C Propeller FH 76 750 A B C Propeller Hub 750 A B C Engine, Chapter 72 750 A B C Astazou XII 750 A B C Engine Controls, Chapter 76 10,000 A B C D E F Cables, Turnbarrels and Pulleys Aft of Firewall 10,000 C Note 3 Prop Contactor Box EO B Automatic Control Box EO B Power Limiter EO B Leak Valve EO B Speed Governor EO B Pitch Motor EO B Prop Microswitch Assembly EO B Emergency FFP Stop Switch EO B Engine Indicating, Chapter 77 10,000 A B C D E F Power Indicator Potentiometer OC A F Percent Power Indicator 6,000 A F Jet Pipe Temp.
Indicator 6,000 A F Exhaust, Chapter 78 EO A B C Engine Oil, Chapter 79 EO A B C
Effective date ____________________ Page 6 of 6
OPERATIONS SPECIFICATIONS
AIRCRAFT MAINTENANCE
SHORT TURBO-SKYVAN Note 1 Remove lagging at 2,500 and 5,000 hours for sample inspections in accordance with factory instructions.
Note 2 Weigh bottles each 3 months. Hydrostatic test each 5 years.
Note 3 Check cable tension each year.
Note 4 Check tank quantity indicator capacitance units and internal surfaces of flex tanks every 2 years.
Note 5 Check collector tank and negative "G" valve-vent, in accordance with factory instructions, when booster pump is changed.
Note 6 Replace filter elements at times specified by factory.
Note 7 Sample overhaul 1 valve at 1,200 hours.
Note 8 Sample overhaul main gear and nose gear assemblies at 5,000 hours in conjunction with Note 11.
Note 9 Sample overhaul of structure in accordance with factory instructions at 5,000 hours or 5 years.
Note 10 Remove windows and skin access panels in accordance with factory instructions every 5,000 hours or 5 years in order to check for corrosion of skin and skin corrugations.
Note 11 Remove and inspect sample bolts and/or pins in accordance with factory instructions every 5,000 hours.
Note 12 Check for fatigue damage in accordance with factory instructions initially at 12,000 landings and each 2,000 landings thereafter until a total of 20,000 landings, then every 1,000 landings.
Effective date ____________________ ----------------------------------------------------------------
---------------------------------------------------------------- FIGURE 33. OPERATIONS SPECIFICATIONS AIRCRAFT MAINTENANCE
- SIKORSKY S-61L/N HELICOPTER Form Approved.
UNITED STATES OF AMERICA Budget Bureau FEDERAL AVIATION AGENCY No. 04-R075.
WASHINGTON Part D Page 1 of 15
OPERATIONS SPECIFICATIONS
AIRCRAFT MAINTENANCE SIKORSKY S-61L/N HELICOPTER Overhaul Inspection & Period Check Period Air Conditioning, Chapter 21 9,000 Heater Assembly 2,000 Ducting, Heater Compartment O.C.
Fuel Control Assembly, Heater 2,000 Blower, Cabin Ventilation 2,500 Relay, Blower, Heater O.C.
Relay Heater, Ventilation Blower O.C.
Relay, Heater Overheat O.C.
Control Unit, Heater 2,000 Valve, Heater Fuel Shut-off 2,000 Sensing Elements, Cabin Air O.C.
D.C. Motor, Cabin Air Sensing 1,500 Ignition Unit 2,000 Switch, Air Ram Pressure O.C.
Switch, Thermal Overheat O.C.
Switch, Fan Thermal Overrun O.C.
Switch, Thermal Cycling O.C.
Switch, Outside Air Temperature O.C.
Sensing Element, Heater Discharge O.C.
Light, Warning O.C.
Circuit Breakers O.C.
Switches O.C.
Rheostat, Temperature Selector O.C.
Wiring and Connections O.C.
Ducting Installation, Cabin 9,000 Air Vent Installation, Cabin 9,000 Ducting Installation, Cockpit 9,000 Lines and Fittings, Fuel (Airframe) O.C.
Relay, Time Delay O.C. Functional Check Valve, Backfire O.C.
Automatic Flight Control System, Chapter 22 May be determined by the assigned inspector.
Communications System, Chapter 23 May be determined by the assigned inspector.
Effective date ____________________ Page 2 of 15
OPERATIONS SPECIFICATIONS
AIRCRAFT MAINTENANCE SIKORSKY S-61L/N HELICOPTER Overhaul Inspection & Period Check Period Electrical Power, Chapter 24 9,000 Power System DC Battery O.C.
Relay, Battery O.C.
Regulator, Voltage (DC) 1,200 Relay, Over Volt Field Control 1,200 Generator/Motor 1,000 Relays, Reverse Current 2,000 Relay, External Power (DC) O.C.
Relay Motorizing 2,000 Transformer Rectifier 1,500 Receptacle, External Power (DC) O.C.
Support, Battery Vibration Absorber 1,000 Power System AC Generators (AC) 1,500 Brushless Type (AC) 2,500 Regulators, Voltage (AC) 1,200 Panels, Supervisory (AC) 1,200 Line Contactors, Generators (AC) 2,000 Relays, External (AC) O.C.
Relay, External Power Interlock O.C.
Contactor, Emergency Essential Bus 2,000 Inverter 1,000 Receptacle, External Power O.C.
Transformers, Power Step-Down O.C.
Test Receptacle, AC/DC O.C.
AC & DC Systems Wiring and Connections O.C.
Switches O.C.
Circuit Protectors O.C.
Relay, Inverter O.C.
Lights, Warning O.C.
Static Discharge Wicks O.C.
Relay, Inverter Transfer O.C.
Equipment and Furnishing, Chapter 25 9,000 First Aid Kits Cabin, Passenger O.C.
Cockpit O.C.
Effective date ____________________ Page 3 of 15
OPERATIONS SPECIFICATIONS
AIRCRAFT MAINTENANCE SIKORSKY S-61L/N HELICOPTER Overhaul Inspection & Period Check Period Seats - Cockpit Seat Belts O.C.
Shoulder Harnesses and Reels 9,000 Seats 9,000 Seats - Passenger Cabin Seat Belts O.C.
Seats and Attachments 9,000 Cabin Interior Upholstery O.C.
Partition, Cabin Movable O.C.
Fire Protection, Chapter 26 9,000 Fire Detection System - Engine Control Units, Fire detection O.C.
Sensing Loops and Fittings ** O.C. Functional Check Lights, Warning O.C.
Wiring and Connections O.C.
Circuit Protectors O.C.
Switches O.C.
Fire Extinguisher - Head Cabin O.C.
Cockpit O.C.
Fire Extinguisher System - Engine * Engine Change Lines and Nozzles * O.C.
Handles, Fire Control O.C.
Switch, Fire Extinguishing O.C.
Container and Valve Assembly O.C.
Wiring and Connectors O.C.
Indicator, Thermal Discharge O.C.
Supports, Fire Extinguisher
Container O.C.
* Directional Flow Check (Nitrogen or Smoke Source) ** Functional Check - Scheduled Engine Change Using Jetcal Analyzer or Per Sikorsky Maintenance Manual Effective date ____________________ Page 4 of 15
OPERATIONS SPECIFICATIONS
AIRCRAFT MAINTENANCE SIKORSKY S-61L/N HELICOPTER Overhaul Inspection & Period Check Period Fuel System, Chapter 28 9,000 Tub Section Tanks, Fuel 9,000 Fuel Lines, Fittings 9,000 Pumps, Booster 1,200 Ejectors 9,000 Fuel Filter, Airframe 9,000 Valves, Manual Shut-off 9,000 Valve, Cross-feed 9,000 Pressure Switch, Pump Failure 9,000 Vents, Fuel Tanks 9,000 Drain Sumps 9,000 Valves, Fuel Drain 9,000 Cabin Section Firewall * Valves, Fuel Shut-off 9,000 Functional Check Pressure Switches, Fuel Shut-off 9,000 Pressure Fueling System Valves, High Level Shut-off 9,000 Adapter, Fueling and Defueling 9,000 Valve, Fueling and Defueling 9,000 Float Switches, Intermediate Level Selector O.C.
Lines and Fittings, Fueling Adaptor 9,000 Electrical System Switches O.C.
Circuit Protectors O.C.
Lights, Warning O.C.
Wiring and Connections O.C.
Wiring & Conduits (Tank Cells) O.C.
Lights, Preset O.C.
* Functional Check at Engine Change Effective date ____________________ Page 5 of 15
OPERATIONS SPECIFICATIONS
AIRCRAFT MAINTENANCE SIKORSKY S-61L/N HELICOPTER Overhaul Inspection & Period Check Period Hydraulic Power, Chapter 29 9,000 Primary Servo System Reservoir O.C.
Pump 2,000 Manifold Assembly (Includes 6 Items) 2,000 Relief Valve Three-Way Solenoid Valve Filter (Pressure) Restrictors (By-Pass) Pressure Switch Snubber Check Valves O.C.
Hoses, Lines and Fittings O.C.
Switch, Servo Shut-off O.C.
Wiring and Connections O.C.
Lights, Warning O.C.
Circuit Protectors O.C.
Auxiliary Servo System Reservoir O.C.
Pump 2,000 Manifold Assembly (Includes 6 Items) 2,000 Relief Valve Three-Way Solenoid Valve Filter (Pressure) Restrictors (By-Pass) Pressure Switch Snubber Check Valves O.C.
Wiring and Connections O.C.
Switches, Stick Trim O.C.
Light, Warning O.C.
Filter, Auxiliary Servo O.C.
Ice and Rain Protectors, Chapter 30 9,000 Windshield Wiper System
Motor, Wiper O.C.
Converters O.C.
Arms and Blades, Wiper O.C.
Wiring and Connections O.C.
Switch O.C.
Effective date ____________________ Page 6 of 15
OPERATIONS SPECIFICATIONS
AIRCRAFT MAINTENANCE SIKORSKY S-61L/N HELICOPTER Overhaul Inspection & Ice and Rain Protectors, Period Check Period Chapter 30 (Cont.)
Windshield Washer System Reservoir O.C.
Surgemeter O.C.
Nozzles O.C.
Hoses, Lines and Fittings O.C.
Windshield Anti-Icing System Temperature Controller O.C.
Auto-Transformers O.C.
Windshield Panel, Electropane O.C.
Wiring and Connections O.C.
Switches O.C.
Pitot Tube Heater System Heads, Pitot Heat O.C.
Wiring and Connectors O.C.
Lights, Warning O.C.
Switches O.C.
Relays, Pitot Heater O.C.
Instruments, Chapter 31 9,000 Power Plant Instruments Indicators, Gas Generator O.C.
Indicators, Power Turbine Inlet Temp.
(Howell Instrument Co.) O.C.
Indicators, Oil Temperature O.C.
Indicators, Oil Pressure O.C.
Transmitters, Oil Pressure Indicator O.C.
Indicators, Fuel Pressure O.C.
Transmitters, Fuel Pressure Indicator O.C.
Indicators, Triple Tachometer O.C.
Indicators, Torque Meter O.C.
Transmitters, Torque Meter Indicator O.C.
Miscellaneous Instruments Indicator, Transmission Oil Pressure O.C.
Transmitter, Trans. Oil Pressure Ind. O.C.
Indicator, Trans. Oil Temperature O.C.
Indicator, Primary Hydraulic Pressure O.C.
Indicator, Auxiliary Hyd. Pressure O.C.
Transmitter, Aux. Hyd. Press. Ind. O.C.
Indicator, Free Air Temperature O.C.
Effective date ____________________ Page 7 of 15
OPERATIONS SPECIFICATIONS
AIRCRAFT MAINTENANCE SIKORSKY S-61L/N HELICOPTER Overhaul Inspection & Period Check Period Miscellaneous Instruments (Cont.)
Ammeter-Voltmeter (DC) O.C.
Volt-Ammeter (AC) O.C.
Indicators, Fuel Quantity O.C.
Tank Probes, Fuel Quantity 9,000 Control Units, Fuel Low Level O.C.
Sensors, Fuel Low Level O.C.
Wire and Connection O.C.
Lights, Low Level Warning O.C.
* Indicator, Landing Gear O.C.
Transmitter, Primary Hyd. Press.
Ind@ @ @ O.C.
Landing Gear, Chapter 32 9,000 Main Gear Installation Strut Assemblies, Shock 5,000 Wheels O.C.
Tires O.C.
Struts, Energy Absorbing 9,000 Supports 9,000 Attachment Fitting, Fuselage 9,000 Fairing O.C.
Switches, Under Frequency Lockout
Scissors O.C.
Wiring and Connections O.C.
* Hydraulic Pump and Motor Unit 2,000 * Hydraulic Reservoir 2,000 * Filters, Reservoir Panel O.C.
* Relief and Control Valves O.C.
* Plug Stat O.C.
* Mounting and Supports O.C.
* Lines and Fittings O.C.
* Drag Links Upper and Lower 5,000 * Switches O.C.
* Control Unit O.C.
* Relays, Landing Gear O.C.
* Relay, Pump Motor O.C.
* Emergency Release Control O.C.
* Shock Strut and Trunnion Assembly 5,000 * Retracting Cylinders 5,000 * Emergency Release Pin, Cables, and Pulleys O.C.
* Uplock Cylinder 5,000 * Emergency Air Bottle O.C.
@ * "N" MODEL ONLY Effective date ____________________ Page 8 of 15
OPERATIONS SPECIFICATIONS
AIRCRAFT MAINTENANCE SIKORSKY S-61L/N HELICOPTER Overhaul Inspection & Period Check Period Tail Gear Installation Shock Strut Installation 5,000 Centering Cylinder 5,000 Attachment, Fuselage 9,000 Wheel O.C.
Tire O.C.
Control System, Tail Wheel Lock O.C.
Fairing O.C.
Wheel Brake System Brake Assemblies O.C.
Master Cylinders 9,000 Mixing Valves, Wheel Brake 9,000 Parking Brake Valve 9,000 Hoses, Lines, Check Valves and Fittings O.C.
Lights, Chapter 33 9,000
Light Assemblies Position O.C.
Light Assemblies, Anti-Collision O.C.
Light Assemblies, Retractable Landing O.C.
Spot Lights, Cockpit O.C.
Dome Light, Cockpit O.C.
Rheostat, Emergency O.C.
Light Assemblies, Instruments O.C.
Rheostats O.C.
Light, Master Warning O.C.
Panel Assemblies, Warning Light O.C.
Control Unit, Warning Light Dimming O.C.
Dome Lights, Cabin O.C.
Reading Lights, Passenger O.C.
Lights, Cabin Emergency O.C.
Lights, No Smoking O.C.
Lights, Fasten Seat Belts O.C.
Light Assemblies, Loading O.C.
Relay, Loading Light O.C.
Lights, Warning O.C.
Wiring and Connections O.C.
Switches O.C.
Riding Light O.C.
* "N" MODEL ONLY Effective date ____________________ Page 9 of 15
OPERATIONS SPECIFICATIONS
AIRCRAFT MAINTENANCE SIKORSKY S-61L/N HELICOPTER Overhaul Inspection & Period Check Period Navigation, Chapter 34 9,000 Flight and Navigation Instruments Clocks (Wakeman) O.C.
Indicators, Turn and Slip (Allen) O.C.
Instantaneous Vert. Speed Indicator (IVIS) (Specialties Corp.) O.C.
Indicators, Altimeter (Kollsman) O.C.
Indicators, Airspeed (Kollsman) O.C.
Compass, Magnetic (U.S. Gage) O.C.
Compass, C-4A or C-14A Gyrosyn System Amplifier, Gyrosyn Compass O.C.
Flux Valve and Compensator Assembly O.C.