Control Unit, Gyrosyn Compass O.C.
Relay, Interlock (DC) O.C.
Relay, Interlock (AC) O.C.
Transformer, Power Adapter O.C.
Gyro and Sync Assembly O.C.
Servo Amplifier O.C.
Annunciator O.C.
Vertical Gyro Installation Indicator, Navigational Lear Model 4005A 2,500 Gyros, Roll & Pitch Lear Model 7000B 1,500 Amplifier Navig. Instrument Lear Model 5510B O.C.
Power Adapter Airframe Supplies O.C.
Wiring Connections O.C.
Static & Pitot Systems Lines and Fittings O.C.
Pitot-Static Mast MGB OVHL Doors, Chapter 52 * 9,000 Cabin Passenger Doors 9,000 Release, Mechanisms Door Emergency 9,000 Cargo Door 9,000 Release Mechanism, Cargo Door 9,000 Lights, Warning, Cargo and Passenger O.C.
* May be accomplished progressively by zones.
(see zone table on page 12 of 15) Effective date ____________________ Page 10 of 15
OPERATIONS SPECIFICATIONS
AIRCRAFT MAINTENANCE SIKORSKY S-61L/N HELICOPTER Overhaul Inspection & Period Check Period Doors, Chapter 52 (Cont.) 9,000 Hull Baggage Doors ** 9,000 Electronic Compartment Door 9,000 Lights, Warning, Baggage & Electronic Door O.C.
Upper Fuselage Platforms, Engine Servicing O.C.
Platforms, Transmission Servicing O.C.
Electrical Systems Wiring & Connections, Warning Lights O.C.
Switches, Warning Light O.C.
Fuselage, Chapter 53 * 9,000 Structure, Pylon (Zone 1) 9,000 Structure, Upper Fuselage Engine Compartment (Zone 2) 9,000 Structure, Upper Fuselage, Main Gear Box Compartment (Zone 3) 9,000 Support, Main Gear Box (Zone 3) 9,000 Structure, Tail Cone (Zone 4) 9,000 Hull Structure (Zone 6) 9,000 Structure, Cockpit (Zone 7) 9,000 Structure, Electronics Compartment (Zone 7) 9,000 Structure, Cabin (Zone 8) 9,000 Structure, Hull (Zone 9) 9,000 Sponsons 9,000 Stabilizers, Chapter 55 * 9,000 Stabilizer Installation (Zone 1) Structure, Stabilizer 9,000 Attachment Fittings, Stabilizer 9,000 Support, Tube, Stabilizer 9,000 Windows, Chapter 56 * 9,000 Cockpit Emergency Escape Exits 9,000 Release Mechanism, Emergency (Airframe) 9,000 Windshields and Windows O.C.
** S-61 L Model Only * May be accomplished progressively by zones.
(see zone table on page 12 of 15) Effective date ____________________ Page 11 of 15
OPERATIONS SPECIFICATIONS
AIRCRAFT MAINTENANCE SIKORSKY S-61L/N HELICOPTER
Overhaul Inspection & Period Check Period Windows, Chapter 56 (Cont.) 9,000 Cabin Windows * O.C.
Emergency Escape Exits 9,000 Release Mechanism, Emergency (Airframe) 9,000 Rotor System, Chapter 65 9,000 Main Rotor Head Installation Blades O.C.
Main Rotor Head Assembly 1,250 Azimuth Control Star Assembly 1,250 Dampers 1,250 Bifilar Vibration Assembly Main Rotor Head O/H Tail Rotor Installation Blades O.C.
Hub Assembly 1,250 Flight Controls Collective Pitch Assembly (Zone 7) 9,000 Collective Pitch Assembly (Zone 8) 9,000 Collective Balance Spring (Zone 7) 9,000 Cyclic Pitch Assembly (Zone 3) MGB O/H Cyclic Pitch Assembly (Zone 7) 9,000 Cyclic Pitch Assembly (Zone 8) 9,000 Rudder Flight Control Assembly (Zone 7) 9,000 Mixing Unit 9,000 Force Link Assembly 9,000 Rudder Flight Control Assembly (Zone 1) 9,000 Rudder Flight Control Assembly (Zone 4) 9,000 Rudder Flight Control Assembly (Zone 8) 9,000 Rudder Pedal Adjusting Installation (Zone 7) 9,000 Negative Force Gradient Spring Assembly 9,000 Primary Servos 1,250 Auxiliary Servo with Beeper Trim Valves 1,250 Rudder Control Cables O.C.
Drive Shafts Tail Drive Shaft, Section I 2,500 Tail Drive Shaft, Section II 2,500
Tail Drive Shaft, Section III 2,500 Tail Drive Shaft, Section IV 2,500 Tail Drive Shaft, Section V 3,000 Support, Tail Drive Shaft Bearings 2,500 * May be accomplished progressively by zones.
(see zone table on page 12 of 15) Effective date ____________________ Page 12 of 15
OPERATIONS SPECIFICATIONS
AIRCRAFT MAINTENANCE SIKORSKY S-61L/N HELICOPTER Overhaul Inspection & Period Check Period Rotor System, Chapter 65 (Cont.) 9,000 Gear Boxes Main Gear Box 1,250 Intermediate Gear Box 3,000 Tail Gear Box Installation 3,000 Oil Cooler Installation, Main Gear Box MGB O/H Supports, Oil Cooler Installation O.C.
Actuator, Rotor Brake Installation MGB O/H Accumulator, Rotor Brake 9,000 Relief Valve, Rotor Brake O.C.
Pressure Switch, Rotor Brake Warning Light O.C.
Master Cylinder, Rotor Brake 9,000 Lines & Fittings, Rotor Brake Hydraulic O.C.
Pressure Switch, MGB Oil Warning MGB O/H Lights, Warning O.C.
Wiring and Connections O.C.
Speed Switch, Motor/Generator (if installed) MGB O/H Note: Zones and areas referenced are as follows:
ZONE AREA
1. . . . . . . . Pylon and Stabilizer - Station 622 Aft
2. . . . . . . . Upper Fuselage, Engine Section - Station 178
- 247
3. . . . . . . . Upper Fuselage, Main Gear Box - Station 247
- 362
4. . . . . . . . Tail Cone - Station 493 - 622
5. . . . . . . . Landing Gear (Main and Tail Gear)
6. . . . . . . . Fuel Cells - Station 186 - 323 (Below Water Line
106)
7. . . . . . . . Cockpit and Electronics - Station 0 - 110
8. . . . . . . . Cabin - Station 110 - 493 (Above Water Line 106)
9. . . . . . . . Hull - Station 110 - 186, 323 - 459 (Below Water Line 106) Powerplant - General, Chapter 71 1,800 Cowling Fairing, Intake Duct O.C.
Cowling, Engine O.C.
Firewall O.C.
Fire Seal, Rear Support O.C.
Engine Suspension Support, Rear Eng. O/H Supports, Front Eng. O/H Effective date ____________________ Page 13 of 15
OPERATIONS SPECIFICATIONS
AIRCRAFT MAINTENANCE SIKORSKY S-61L/N HELICOPTER Overhaul Inspection & Period Check Period Powerplant - General, Chapter 71 (Cont.) 1,800 Drive Shaft Installation Thomas Coupling and Adapter Eng. O/H Drive Shaft Eng. O/H Coupling, MGB Input (Drive Shaft Portion) Eng. O/H Instrumentation Supports, Indicator Transmitters 9,000 Lines and Fittings, Indicator Transmitters O.C.
Wiring and Connections O.C.
* Damper Weights and Clamps O.C.
Engine, Chapter 72 1,800 Engine CT58-110-1 2,000 ** CT58-110-2 2,400 **
CT58-140-1 2,400 ** CT58-140-2 1,500 ** ** Major Inspection as defined in G.E. O/H Manual SEI-102 (CT58-110 Engines) and SEI-183 (CT58-140 Engines) is required at the following intervals:
CT58-110-1 600 CT58-110-2 800 CT58-140-1 800 CT58-140-2 500 Compressor Section Eng. O/H Combustion & Gas Gen. Section Eng. O/H Power Turbine Section Eng. O/H Accy Dr. Assy. Eng. O/H Flex. Dr. Shaft Eng. O/H *** *** Lubrication required every 100 hours per SEI-101 or SEI-182.
Lubrication System (Engine) Lines and Fittings O.C.
Lubrication Pump Eng. O/H Oil Cooler Eng. O/H * "N" MODEL ONLY Effective date ____________________ Page 14 of 15
OPERATIONS SPECIFICATIONS
AIRCRAFT MAINTENANCE SIKORSKY S-61L/N HELICOPTER Overhaul Inspection & Period Check Period Fuel System (Engine), Chapter 73 Eng. O/H Lines and Fittings O.C.
Fuel Control Unit 1,600 Flow Divider Eng. O/H Fuel Pump 1,600 Filter, Centrifugal 1,600 Filter, Static Eng. O/H Ignition System, Chapter 74 Eng. O/H Ignitor Unit Eng. O/H Ignitor Plug Eng. O/H
Harness, Ignition Eng. O/H Air, Chapter 75 Eng. O/H Starter Cover O.C.
Intake Duct, Engine Air O.C.
Boots, Intake Duct Anti-icing (Heating Element) O.C.
Thermal Switch, 40 degrees F Warning O.C.
Control Unit, Intake Duct Anti-icing O.C.
Relay, Current Sensing, Warning Light O.C.
Switches, Control O.C.
Wiring and Connections O.C.
Lights, Warning O.C.
Relays, Engine Anti-Ice Solenoid O.C.
Valve, Anti-icing Eng. O/H Lines and Fittings Anti-icing Valve Eng. O/H Actuator, Variable Vane Eng. O/H Pilot Valve, Variable Vane Actuator 1,600 Lines and Fittings, Variable Vane Actuator Eng. O/H Vane Actuator, Linkage and Cable Eng. O/H Lines and Fittings Air Bleed Systems Eng. O/H Lines and Fittings, Compressor Inlet Temp. Eng. O/H Valve, Starting Bleed (CT58-140-1, 140-2) Eng. O/H Engine Control System, Chapter 76 Eng. O/H Engine Control System Control Quadrant Installation 9,000 Cables, Control 9,000 Pulleys, Control Cable 9,000 Supports, Cable Pulleys 9,000 Control Box, Engine 9,000 Remote Topping Control Gear Box 9,000 Remote Topping Control Rods O.C.
Effective date ____________________ Page 15 of 15
OPERATIONS SPECIFICATIONS
AIRCRAFT MAINTENANCE SIKORSKY S-61L/N HELICOPTER
Overhaul Inspection & Period Check Period Engine Control System, Chapter 76 (Cont.) Eng. O/H Emergency Control System Box Assembly, Teleflex 9,000 Cables, Teleflex 9,000 Conduit, Teleflex 9,000 Engine, Indicating, Chapter 77 Eng. O/H Thermocouple Harnesses Eng. O/H Thermocouple Units O.C.
Leads, Thermocouple O.C.
Generator, Gas Generator Tachometer Eng. O/H Generator, Power Turbine Tachometer Eng. O/H Wiring and Connections O.C.
Engine Exhaust, Chapter 78 O.C.
Exhaust Tail Pipe (Airframe) O.C.
Oil, Chapter 79 Eng. O/H Oil Tank Installation Hose, Lines and Fittings O.C.
Support, Oil Tank O.C.
Oil Tank O.C.
Change Oil (Engine) Eng. O/H Pressure Switches, Low Pressure Warning O.C. Functional Check Bulb, Engine Oil Temperature O.C.
Wiring and Connections O.C.
Warning Lights, Oil Low Pressure O.C.
Starting, Chapter 80 Eng. O/H Starters Eng. O/H Relays, Starters Eng. O/H Wiring and Connections, Starter (Airframe) O.C.
Warning Lights, Starter Drop-Out Relay O.C.
Effective date ____________________ ---------------------------------------------------------------- ---------------------------------------------------------------- FIGURE 34. OPERATIONS SPECIFICATIONS, AIRCRAFT MAINTENANCE - LEAR MODEL 24/24B/25 Form Approved.
UNITED STATES OF AMERICA Budget Bureau FEDERAL AVIATION AGENCY No. 04-R075.
WASHINGTON Part D Page 1 of 9
OPERATIONS SPECIFICATIONS
AIRCRAFT MAINTENANCE - GENERAL LEAR MODEL 24/24B/25 Inspections shall be accomplished in accordance with the applicable procedures as listed in ABC Airlines Maintenance Manual.
Preflight (PF) shall be accomplished each service calendar day.
Inspection shall be in accordance with the applicable procedures listed in ABC Airlines Maintenance Manual.
Station Check (SC) shall be accomplished at basic intervals of 100 hours time in service. Inspection shall be in accordance with applicable procedures listed in ABC Airlines Maintenance Manual. During initial operation, the basic intervals for station checks will be evaluated in the following manner:
Ten inspections at 80 hours. * Periodic Inspection (PI) shall be accomplished at intervals not to exceed 200 hours time in service. Inspection shall be in accordance with the applicable procedures listed in ABC Airlines Maintenance Manual. During initial operation, the basic intervals for periodic inspections will be evaluated in the following manner:
Five inspections at 160 hours. * * Note - Upon termination of the evaluation period, the assigned FAA maintenance and avionics inspectors will review the maintenance inspection findings and the operating history. If satisfactory, the carrier will be authorized to continue at the time established for the subsequent state,
i.e., Station Check - 100 hours Periodic Inspection - 200 hours Overhaul times as listed in hours and years are maximum limits of whichever occurs first.
In addition to the preflight, periodic, and station checks there are "other" inspections required. These inspections are explained in the notes below or are self-explanatory.
Time retirement items must be replaced where "replace" is
indicated. (Refer to FAA Approved Lear Report 24/25-S47.)
Effective date ____________________ Page 2 of 9
OPERATIONS SPECIFICATIONS
AIRCRAFT MAINTENANCE - GENERAL LEAR MODEL 24/24B/25 NOTE 1: Insp. @ ea. 1,000 hrs. or once ea. 1 yr. (use Lear 1,000 hr. insp. form) ** NOTE 2: Insp. @ ea. 5,000 hrs. or once ea. 5 yrs. (use Lear 5,000 hr. insp. form) ** NOTE 3: Insp. @ Engine O/H or CHG.
NOTE 4: Insp. @ ea. 2,500 hrs. (use Lear 2,500 hr. insp. form) ** NOTE 5: Insp. @ ea. 500 hrs. or ea. 6 mos. (use Lear 500 hr.
insp. form) ** NOTE 6: Overhaul and hot section inspections in accordance with General Electric Service Bulletin (CJ 610) 72-43 (GEB No. 4) Rev. 7, dated 11/29/68, or subsequent revisions which are FAA approved. The "Periodic Inspection" intervals mentioned in the above Service Bulletin will be adjusted to coincide with periodic inspection as set forth on Page 1 of this Specification. ** NOTE 7: Yearly intervals, engine change, and engine overhaul.
NOTE 8: Special inspections to be conducted in accordance with schedule and procedures set forth in Lear and General Electric Maintenance Manuals. ** (** Specifically identify by revision number and/or date.)
AVIONICS SYSTEMS. The term "System" means all those interdependent subassemblies, component parts, etc., necessary for the proper functioning of the system as a whole. The term "Bench Check" includes calibration, if necessary, to return the unit to service.
Aircraft shall not be utilized in air carrier or commercial operations unless:
a. The aircraft and its component parts, accessories, and appliances are maintained in an airworthy condition in accordance with the schedule of maintenance and inspection functions and procedures set forth in the operator's maintenance manual.
b. OC "On Condition" items will be maintained in continuous airworthiness condition by periodic and progressive
inspections, checks, services, repair, and/or preventive maintenance and shall be appropriately described in the operator's maintenance manual.
c. Parts or subcomponents, not listed below, will be checked, inspected, and/or overhauled at the same time limits specified for the component or accessory to which such parts or subcomponents are related.
Abbreviations used in the Lear Model 24/24B/25 maintenance specifications are defined as follows:
BC - Indicates "Bench Check" EO - Indicates "Engine Overhaul" EC - Indicates "Engine Change" OC - Indicates "On Condition" HYD - Indicates "Hydrostatic Test" C - Indicates "Calibration" SI - Indicates "Special Inspections" Effective date ____________________ Page 3 of 9
OPERATIONS SPECIFICATIONS
AIRCRAFT MAINTENANCE LEAR MODEL 24/24B/25
OVERHAUL INSPECTION AND CHECK PERIOD HOURS OR YRS. PF SC PI OTHER Air Conditioning, Chapter 21 OC X X Pre-cooler 6,000 8 X Note 1 Motor Compressor Assy. 6,000 8 X Note 1 Condenser 6,000 8 X Note 1 Compressor 3,000 3 X Note 1 Cabin Rate of Climb Ind. OC X BC/2 yrs.
Cabin Altitude Controller 5,000 4 X Note 1 Cabin Altitude & Diff. Pressure OC X BC/2 yrs.
Thermostat OC X BC/2 yrs.
Outflow Valve 2,000 2 X Note 1 Safety Valve 2,000 2 X Note 1 Aneroid Sw. OC X BC/4 yrs.
Flow Control Valve 4,000 4 X Note 1
Autopilot, Chapter 22 OC X X Computer Amplifier OC X X X BC Note 1 Flight Controller OC X X X BC Note 1 Altitude Controller OC X X X BC Note 1 Servo Pitch OC X X X BC Note 1 Servo Yaw, Roll OC X X X BC Note 1 Followup Pitch, Yaw & Roll OC X X X Rate Gyro OC X X X BC Note 1 Effort Indicator OC X Lateral Accelerometer OC X Drum & Brkt. Assy.
(Pitch) OC X X Note 5 Drum & Brkt. Assy.
(Yaw) OC X X Note 5 Drum & Brkt. Assy.
(Roll) OC X X Note 5 Communications System, Chapter 23 OC X X X To be determined by assigned inspector.
Electrical System, Chapter 24 OC X X Starter - Generators OC X X BC/800 hrs.
Battery N/C OC X X Voltage Regulator 2,000 X BC Note 5 Inverter OC X X X BC Note 1 Standby Inverter OC X X X BC Note 1 Emergency Battery with Inverter 2,000 X X X BC Note 5 Electrical Warning Panel OC X X X BC Note 1 AC Voltmeter OC X X X BC Note 1 DC Voltmeter OC X X X BC Note 1 Ammeters OC X X X BC Note 1 Starter - Gen Control Panel OC X X BC Note 1 Effective date ____________________ Page 4 of 9