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This checklist is Beechcraft part #414-180206 - Please let me know if you find errors as I have manually typed this in to the website.  This page has not been checked for accuracy and is posted only for reference and not for actual use. 

Beech 18 Maintenance 100-Hour Inspection and Procedures Checklist

Check for conformity with FAA Specifications, Airworthiness Directives, service bulletins and letters.

Note
It is recommended that reference be made to the applicable maintenance handbooks, service bulletins and letters, installation instructions, and vendor specifications for proper torque values, clearances, settings, tolerances and other specifications

  A. Operational Inspection

Mech

Insp

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1 Engine Controls - Check for freedom of movement, full travel, excessive backlash, and proper friction operation.      
2 Boost Pump fuel pressure - Check for proper limits      
3 Oil pressure and temperature - Check for proper limits      
4 Fuel pressure (engine pump) -  Check for proper limits      
5 All lights - Check for operation and replace defective bulbs as necessary.      
6 Fuel tank selectors - Check for ease of operation and detenting      
7 Fuel flowmeters - Check operation      
8 Generator - Check output and paralleling      
9 Propeller governors - Check for proper governing operation and ease of control movement      
10 Magnetos - Check for drop and "off" position operation (proper shutoff)      
11 Idle RPM - Check for correct mixture and RPM.      
12 Cylinder head temperature - Check for proper limits.      
13 Propeller feathering - Check for proper operation      
14 Brakes (toe and parking) - Check for proper travel, ease of operation , and proper release of parking brake.      
15 Deicer, wing and tail pneumatic - Check for proper operation and cycling.      
16 Starters - Check for proper operation (clutch slipping or noisy).      
17 Flaps - Check for proper travel and operation (noisey or erratic).      
18 Anti-icer alcohol; (a)propeller, (b)induction check for proper operation      
19 Anti-icer (electric propeller) - Check for proper operation and amperage.      
20 Autopilot - Check for proper operation, with and without deicers      
21 Power check - Check engines for proper output in accordance with engine manufacturers manuals and cautions on power reductions.      
22 Radio, radar, electronic equipment - Check for proper operation.      
23 Gyro instruments - Check for noisy or erratic operation.      
24 Vacuum pressure warning lights - Check for operation.
 		    
25 Windshield wipers - Check for proper operation and wiper blade position. Note: Spray stream of water on glass to avoid damage to window or wiper motor when checking.    
26 Heat and ventilation system - Check operation of all outlets and all controls for ease of operation in manual and automatic positions.    
27 Pitot heat - Check amperage drawn on ammeter and proper heating at unit.    
28 Stall warning - Check for operation and heating    
29 Windshield anti-icing - Check pump for proper operation and check system for leaks, clogged filters, or stopped-up spray holes.    
30 Induction air heat - Check controls and valve for proper operation.    
  B.  Cockpit Mech Insp
1 Seats and seat belts - Inspect seats for proper operation and security; determine that seat belts are in satisfactory condition and that latching parts operate freely and lock properly. cracks, scratches, nicks, or discoloration and for security of installation; Inspect seals for deterioration.    
2 Windshield - Check for signs of crazing, cracks, scratches, nicks, or discoloration and for security of installation;  Inspect seals for deterioration.    
3 Control columns - Check for condition, attachment, and operation.    
4 Control surface tab wheels, handles, and indicators - Check for freedom of movement and for proper response of control surfaces to controls; Check indicators for proper operation and check elevator tab indicator for security of electrical connections.    
5 Flap position switch - Check for operation and proper calibration with flap rheostat.    
6 Rudder pedals - Check rudder pedal condition, clearance, and attachment.    
7 Fire extinguisher - Check for fill and proper operation; Check nozzle for obstructions or evidence of leakage; Check for security of attachment.    
8 Flap and LG Hand crank - Check for freedom of movement and proper operation.    
9 Control pedestal - Check for condition and attachment.    
10 Instrument plumbing and wiring - Inspect instrument panel, subpanels, placards, shock mounts, instruments, and instrument plumbing and wiring for condition and attachment    
11 Electrical equipment and wiring - Check electrical components for security, wire condition, and terminal and wire tightness; Check operation of all lights in cockpit area, including all panel lights and warning lights; Check switches, setting knobs, and circuit breakers for looseness and proper operation.    
12 Flap dynamic brake - Check that the dynamic brake operates properly (instantly stops flap motor when down limit switch is actuated).    
13 Feathering switches - Check switches for proper operation and check attendant wiring for connection and condition.    
14 Air filters - inspect and clean as necessary    
15 Surface control lock - Check for condition, positive lock, and alignment.    
16 Electronic equipment - Check for evidence of damage, overheating, dust and moisture, loose connections or cover fasteners, and security of mountings.    
17 Radio installation - Check headsets, speaker microphones, and related equipment for proper operation; Check the associated cordage and plugs for signs of damage and for correct stowage.    
18 Vent outlets and inlets - Check for condition, obstructions, and operation.    
19 Side windows - Check for freedom of movement and for signs of crazing, cracks, scratches or other damage; Inspect seals for deterioration.    
20 Windshield wiper motor - Check the motor for operation and secure mounting; Check wiring to motor for connection and condition.    
21 Instruments - Check operation and condition.    
22 Emergency static source - Check that line is free of restrictions or obstructions, that control operates properly and that instruments function correctly on emergency static system    
23 Oxygen - Check valve for operation.    
  C.  Fuselage Mech Insp
1 Structure - Check for cracks, loose rivets, and/or concealed damage.    
2 Skin - Inspect skin for condition and loose or missing rivets (if damage is present, check adjacent structure).    
3 Static ports - Check and clean as necessary.    
4 Static drain - Check that drain line is clear of all moisture and free of obstruction.    
5 Inspection doors - Check for fit and attachment.    
6 Antennas - Check for damage, corrosion, defective bonding, loose connections, and security of installation.    
7 Rotating beacons - Check for broken bulbs, security of installation, and operation    
  D.  Inside Tail Mech Insp
1 Skin - Inspect skin for condition and loose or missing rivets (if damage is present, check adjacent structure).    
2 Structure - Check for cracks, loose rivets, and/or concealed damage.    
3 Cables and pulleys - Check control cables, pulleys, and associated equipment and accessories for condition, attachment, alignment, clearance, and proper operation.    
4 Autopilot actuators and cables - Check autopilot servo cables for proper rig, condition, and operation; Check actuators for operation, condition, and attachment. Every third 100 hours check actuator for moisture.    
5 Draft curtain - Check condition and seal of draft curtain.    
6 Tail wheel truss - Check for cracks or other evidence of damage (such as linoil leaks); Check slide tube for bending or other damage and for attachment.    
7 Plumbing - Check lines and fittings for damage and security of installation.    
8 Autopilot oil separator and air filter - Inspect filter for cleanliness (if any oil is found on autopilot side, replace filter cartridge and clean servo actuators); Inspect and clean oil separator; Check autopilot components for bent or broken electrical connectors, damaged seals, poor solder connections, and damaged insulation or wiring; Check drain lines for obstructions; Every third 100-hour inspection, check elevator trim motor for proper lubrication.    
9 Electrical equipment and wiring - Check electrical components for security, wire condition, and terminal and wire tightness    
  E.  Wing Center Section Mech Insp

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1 Structure - Check for cracks, loose rivets, and/or concealed damage.      
2 Skin - Inspect skin for condition and loose or missing rivets (if damage is present, check adjacent structure).      
3 Fuel tanks, sumps, and pumps - Inspect tanks and sumps for leakage or corrosion; Check cells for leakage and plugged vents: Check pumps for proper operation, leakage, attachment, and pressure.      
4 Oil filler doors and caps - Check doors for fit and attachment; Check caps for fit and leakage.      
5 Fuel liquidometer - Check for leakage or visible damage.      
6 Fuel tank covers - Check for condition and fit.      
7 Oil radiator air ducts and valves - Check for attachment, operation, and rigging.      
8 Generator and control boxes - Check boxes for attachment and condition; Check components in box for proper mounting and wiring connections.      
9 Flaps - Inspect flap drive and actuator for condition and attachment; Check skin and structure for condition and loose or missing rivets.      
10 Inspection and access doors - Check for fit and attachment.      
11 Fuel flowmeter system - Check system inverter and transformer for condition, operation, security of installation and wiring.      
12 Fairings - Check for damage and security of attachment.      
13 Wing bolts - Check bolts and fittings for condition and security; Check that bolts are properly safetied.      
14 Truss - Inspect carefully for linoil leaks and other indications of cracks or damage.      
15 Plumbing - Check plumbing for chafing, leakage, damage, and attachment.      
16 Electrical wiring - Check wiring for security, chafing, damage, and attachment.      
17 Control cables - Check cables, pulleys, and associated equipment for condition, attachment, alignment, clearance, and freedom of movement.      
18 Anti-icer liquidometer - Check for leakage and visible damage.    
19 Anti-icer tank - Check for leakage, corrosion, or other damage.    
20 Battery - Remove batteries and inspect general condition of battery, caps, and terminal straps; Check water level and specific gravity; Check battery compartment for abrasions and protective paint coverage; Check drain holes for obstructions; Check jars of lead-acid battery installations for fill and security of attachment.    
  F.  Wheel Wells Mech Insp
L R
1 Structure - Check for cracks, loose rivets, or other damage; Check landing gear structure for wear, condition, and attachment.      
2 Flap retract mechanism - Check for condition, attachment, and lubrication.      
3 Oil system and controls - Check the plumbing, valves and solenoids for leaks, attachment, and condition; Check the controls for attachment and correct travel. Check solenoids for operation.      
4 Geisse safety gear - Check piston and cylinder assemblies for wear, leakage, and proper fluid supply; Check wiring for connections, security, and condition.      
5 Gear struts - Check strut for proper inflation and leakage; Deflate strut and check fluid level if signs of leakage are apparent.      
6 Trusses and wing fittings - Check trusses for linoil leaks or other indications of damage; Check center section wing fittings for damage; On tri-gear, check bolts on main landing gear trusses and fittings for security.      
7 Gear doors and mechanism - Check door operation, fit, fair and rig      
8 Brake system - Check brake discs, bolts, and lines for obvious damage, corrosion, and security of all units; Check braking linings and discs for wear or damage.      
9 Wheels and tires - Check tire for condition and proper inflation; Check wheel hubs for cracks and wheel bearings for condition; Lubricate wheel bearings every second 100-hour inspection.      
10 Retract mechanism - Inspect slides and tubes for bending or other damage and for attachment; Check drag legs, retract chains, and torque shafts and universal joints for wear, condition, and attachment; On tri-gear, check landing gear drive for condition and operation and check gearboxes for grease.      
11 Plumbing - Inspect all plumbing for leakage, condition, and attachment.      
12 Electrical equipment and wiring - Check for clearance, attachment, and condition.      
13 Safety and limit switches - Check for condition and attachment.      
14 Anti-icing pump and motor - check tubing for corrosion, damage, chafing, and security; Check filter for cleanliness; Check electrical connection of motor and pump and operation of each.    
15 H-14 Autopilot relief valve - Inspect for security of attachment, cleanliness and tightness of electrical connections; Inspect autopilot plumbing for condition and security of attachment; Check exhaust line for obstructions.    
16 Fire extinguisher - Check reservoir, discharge head, directional valve, and tubing for leakage, corrosion, and attachment; Check wiring for condition, attachment, and connections.    
17 Heater ignition system - Check ignition unit for security of installation and for damage to case; Check that cover is tightly in place; if not, check the interior for cleanliness; Inspect wiring attachment.    
18 Heater fuel system - Check fuel filter for cleanliness and fuel lines and connections for leakage and security of installation; Inspect pumps and solenoid valves for leakage and security of installation; Check wiring for condition and security and check electrical connections for tightness.    
  G.  Belly Mech Insp
1 Structure - Check for cracks, loose rivets, and/or concealed damage; Inspect the truss through the belly access opening for evidence of cracks, such as linoil leaks.    
2 Skin - Inspect for condition and loose or missing rivets (if damage is found, check adjacent structure carefully).    
3 Landing gear gearbox and motor - Check gearbox and motor for security of installation ; Check motor for tightness of electrical connections; Check gearbox for leakage and lubricate as necessary.    
4 Landing gear clutch - Check for proper lubrication, warpage, and excessive wear; Check clutch for correct overload tension adjustment.    
5 Flap motor and gearbox - Check gearbox and motor for security of installation; Check motor for tightness of electrical connections; Check gearbox for leakage and lubricate as necessary.    
6 Gear torque shafts - Inspect torque shaft and universal joint for condition, attachment, and visible damage. Check gear torque shaft and flap motor support bracket for cracks (tri-gear).    
7 Flap torque shafts - Check for attachment, alignment, and condition.    
8 Flap limit switches - Check switches for security of installation and electrical connections for tightness; Check switches for operation and adjustment.    
9 Flap stops - Check for security, engagement, and wear.    
10 Control cables, pulleys, and fair leads - Check control cables, pulleys, and associated equipment accessories for condition, attachment, alignment, clearance, and proper operation.    
11 Heater control box - Remove cover of control box and inspect for excessively burned points, wiring condition, and attachment.    
12 Plumbing - Check lines and fittings for security of attachment, tightness of connections, leakage, chafing or other signs of damage.    
13 Electrical equipment and wiring - Check for security, chafing, damage, and tightness of connections.    
14 Pitot heads - Check for security of attachment and check drain hole for obstructions.    
15 Access doors - Check for fit and attachment.    
16 Rudder pedal cross shaft - Check for attachment, wear and condition.    
17 Tail gear retract chain - Check for wear, cleanliness, operation, and lubrication; Check for proper tension and freedom of movement.    
18 Handcrank chains - Check links for wear, cleanliness, and lubrication; Check for freedom of movement and operation.    
  H. Cabin Mech Insp
1 Cabin door - Inspect air stair door for security of attachment, presence of safety chain and hook, and condition of door and cables.    
2 Emergency exit hatch - Remove and check for corrosion, freedom of movement lubrication and operation.    
3 Lights - Check lights and switches for proper operation and replace bulbs if necessary.    
4 Cigarette lighters - Check for operation    
5 Baggage webbing - Check for fraying or excessive wear and security of attachment.    
6 Oxygen system - Check outlets for attachment, condition and operations. Check for presence of masks.    
7 Seats and seat belts - Check seats and safety belts for condition, attachment, and operation; Check that latching parts of belt operate freely and lock securely    
8 Cabin Floorboards - Check for condition and attachment.    
9 Windows - Check for cracks, crazing, discoloration, and cleanliness; Check seals for condition and attachment.    
10 Plumbing - Check for condition and attachment; Check fittings for tightness.    
11 Electrical equipment and wiring - Inspect electrical equipment, wiring, and wiring accessories for condition, attachment, and clearance.    
12 First aid kit - Check for security of attachment and that kit is fully stocked.    
13 Air conditioner - Check for attachment and operation.    
  I. Conventional Gear Retraction Mech Insp
1 General operation - Check retraction system for operation of all components through at least two complete cycles; Check for unusual noises or evidence of binding; Check slides of conventional gear for synchronization; Check operation of emergency extension system.    
2 Clutch adjustment - Check cable for proper length; Check clutch for springback adjustment and for adequate separation of gear teeth.    
3 Gear selector switch - Check switch for operation; Check wiring connections for tightness; Inspect mounting brackets for cracks or other evidence of fatigue or failure.    
4 Chain tension - Check that tension is within specified limits.    
5 Limit switch - Check for adjustment and attachment.    
6 Tail gear/main gear - Check rigging.    
7 Door rigging/main and tail gears - Check fit, fair, and rig of doors; Check bushings, bolts, and slides of retract mechanism for wear or other damage and for operation.    
8 Indicator lights - Check for proper operation and for electrical connections for tightness.    
9 Warning horn - Check for proper operation.    
  J. Tri-Gear Retraction Mech Insp
1 General operation - Check retraction system for operation of all components through at least two complete cycles; Check for unusual noises or binding; Check that main gears are synchronized with one another and with the nose gear; Check gears for down-lock; Check that nose gear retract nut does not contact face of gearbox with gears in full down and locked position; Check that main gear retract nut does not contact gearbox with gears full up.    
2 Switches - Check up-limit, down-limit, safety switch and position switches for proper adjustment and operation; Check wiring of switches for condition, security, and tightness of connections.    
3 Indicator lights - Check for proper operation and for condition, security, and connection of wiring.    
4 Clutch adjustment - Check clutch for preload; Check gears for mesh and tension.    
5 Door rigging/nose and main gears - Check fit, fair, and rig of all doors; Check down-stop bolts on door retract bracket for adjustment and that an over-center condition exists on door connecting rod; On main gear doors chuck up-stop screw adjustment for signs of interference with door operation; On nose gear doors check door actuator roller adjustment for engagement with fork of torque tube; Check bushings, bolts and tubes for wear or other damage and for proper operation; Check actuation linkage of main gear doors for binding, corrosion, and lubrication.    
6 Retract chains - Check for proper operation and correct installation on sprockets; Check that nose gear retract chain does not contact the idler assembly cover during retraction and extension of the nose gear. Check for adequate tension.    
  K. Engine Mech Insp
L R
1 Cowlings - Remove all cowling and clean, inspect, lubricate, and repair as needed, including wrapper sheets around accessory section if installed.      
2 Cowl flaps and actuators - Check motor for operation; Check electrical connections for tightness. Check rigging to make sure that door does not hit open or closed limits before motor shuts off.      
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