Aileron Compensator Assembly O.C. B,C,D Aileron Hydraulic Pressure Switch Assembly O.C. B,C,D Aileron Control Disconnect Assembly O.C. B,C Aileron Power Control Package 7,000 B,C Control Column O.C. B,C,D Elevator Hydraulic Shutoff Valve Cartridge 14,000 B,C,D Elevator Hydraulic Compensator Cartridge O.C. B,C,D Elevator Feel Control Assembly 7,000 B,C Elevator Hydraulic Pressure & Switch Cartridge O.C. B,C,D Effective date __________________ Page 5 of 15
OPERATIONS SPECIFICATIONS
AIRCRAFT MAINTENANCE BOEING 727 Overhaul Inspection Period & Check Period Flight Controls, Chapter 27, continued O.C. A,B,C,D Elevator Feel Computer Package 7,000 B,C Elevator Power Control Package 7,000 B,C Flap Asymmetric Shutoff Valve 14,000 B,C FC-7,000 Flap Drive Gearbox Power Unit 14,000 B,C,D Flap Drive Gearbox Alternate 14,000 B,C,D Flap Drive Gearbox Assembly-Angle-Inboard 14,000 B,C,D Flap Position Indicator O.C. C,D Ground Speed Brake Actuator 14,000 B,C,D Ground Speed Brake Hydraulic Control Valve 14,000 B,C,D Ground Spoiler Shutoff Valve 14,000 B,C,D Inboard Flap Flow Limiting Valve 14,000 3C,D Inboard Flap Position Transmitter 14,000 B,C,D Inboard Flap Drive Offset Gearbox 14,000 B,C,D Leading Edge Flap Standby Hydraulic Motor 14,000 B,C,D Leading Edge Flap Actuator and Shuttle Valve 14,000 B,C,D Leading Edge Slat Actuator and Shuttle Valve 14,000 B,C,D Leading Edge Flaps and Slats Control Valve 14,000 B,C,D Leading Edge Flap and Slat Bypass Valve 14,000 B,C,D Leading Edge Flap Position Switch O.C. B,C,D Leading Edge Slat Position Switch O.C. B,C,D Leading Edge Flap Flow Limiting Valve (Standby System) 14,000 B,C,D Outboard Flap Flow Limiting Valve 14,000 B,C,D Outboard Flap Drive Angle Gearbox 14,000 B,C,D Outboard Trailing Edge Flap Transmission Assembly 14,000 B,C,D
Rudder Power Control Unit 14,000 B,C,D Rudder Shutoff Valve Cartridge 14,000 B,C,D Rudder Hydraulic Pressure Compensator Cartridge O.C. B,C,D Rudder Hydraulic Pressure Switch Cartridge O.C. B,C,D Rudder Trim Actuator O.C. B,C,D Rudder Standby Power Control Unit 14,000 B,C,D Spoiler Hydraulic Pressure Relief Valve Cartridge 14,000 B,C,D Spoiler Hydraulic Shutoff Valve Cartridge 14,000 B,C,D Spoiler Hydraulic Actuator Assembly 14,000 B,C,D Effective date _________________ Page 6 of 15
OPERATIONS SPECIFICATIONS
AIRCRAFT MAINTENANCE BOEING 727 Overhaul Inspection Period & Check Period Flight Controls, Chapter 27, continued O.C. A,B,C,D Speed Brake Lever Control Brake Assembly O.C. B,C Stabilizer Trim Actuator 7,000 B,C Stabilizer Trim Drive Motor 7,000 B,C Stabilizer Trim Brake 14,000 B,C Spoiler Differential Mechanism Assembly 7,000 B,C Trailing Edge Flap Bypass Valve 14,000 C,D Trailing Edge Flap Hydraulic Motor 14,000 B,C Trailing Edge Flap Control Valve 14,000 C,D Trailing Edge Inboard Flap Transmission Assembly 12,000 C,D Wing Flap Alternate Drive Motor 12,000 C,D All Flight Control Cables shall be tension checked D Fuel System, Chapter 28 O.C. A,B,C,D Baffle Check Valve O.C. Inspect for condition anytime tank is open at the D check Boost Pump 7,000 A,B,C,D Boost Pump Removal Valve O.C. C,D Boost Pump Bypass Check Valve O.C. C,D Boost Pump Check Valve 7,000
Boost Pump Vent Check Valve 7,000 Engine Shutoff Valve 14,000 B,C Fuel Manifold Crossfeed Valve 14,000 B,C Fuel Dump Control Valve 7,000 Fuel Dump Nozzle Shutoff Valve 14,000 B,C Fueling Level Control Pilot Valve O.C. C,D Fueling Level Control Shutoff Valve 14,000 Fueling Shutoff Valve 14,000 Fueling Manifold Vent Shutoff Valve O.C. C,D Fuel Temperature Probe O.C. C,D Fuel Temperature Indicator O.C. B,C,D Fuel Quantity Indicator O.C. C,D Fuel Quantity Tank Unit O.C. 3C Fuel Quantity Compensator O.C. 3C,D Fuel Quantity Total Indicator O.C. B,C,D Manual Defueling Valve O.C. B,C Tank Dump Valve 14,000 B,C Effective date __________________ Page 7 of 15
OPERATIONS SPECIFICATIONS
AIRCRAFT MAINTENANCE BOEING 727 Overhaul Inspection Period & Check Period Hydraulic System, Chapter 29 O.C. A,B,C,D Accumulator - System "A" O.C. C,D Accumulator - System "B" O.C. C,D Heat Exchanger Assembly O.C. C,D Indicator, Hyd. Quantity System "A", "B" and "Standby" Reservoir O.C. B,C,D Indicator, Remote Pressure 14,000 C,D Interconnect Valve, System "A" and "B" 14,000 C,D Manual Shutoff Valve Cartridge (System "A" Depressurization) 14,000 2C Manual Reservoir Fill Selector Valve O.C. A,B Overheat Sensing Switch O.C. 2C,D Pressure Operated Selector Valve Cartridge (Standby System) 14,000 B,C,D Pump - Engine Driven 4,000 B,C,D Pump - AC Motor Driven - System "B" 4,000 B,C,D Pump - AC Motor Driven (Standby System) 14,000 C,D Pump - Reservoir Pressure Filling O.C. C,D Pneumatic Pressure Gage, Accumulator O.C. B,D Reservoir - System "A" O.C. C,D Reservoir - System "B" O.C. D
Reservoir - Standby System O.C. 2C,D Reservoir Pressure Regulating Valve 14,000 2C Switch Assembly Cartridge, Hyd. Pressure O.C. 2C,D Transmitter - Liquid Level System "A" O.C. B,C,D Transmitter - Liquid Level System "B" O.C. B,C,D Transmitter - Liquid Level Standby System O.C. B,C,D Transmitter - Accumulator Pressure 14,000 2C,D Valve - Pressure Relief Cartridge - System "A" 14,000 2C Valve Assembly - Hydraulic Suction Shutoff 14,000 2C,D Valve Assembly Cartridge - Hyd. Motor Operated (Standby) 14,000 2C,D Valve Cartridge - Pressure Relief - Standby and System "B" 14,000 2C,D Ice and Rain Protection, Chapter 30 O.C. A,B,C,D Cowl Thermal Anti-Icing Shutoff Valve 14,000 C,D Inlet Duct Shutoff Valve 14,000 C,D Ice Detector O.C. C,D Ice Detector Interpreter O.C. C,D Effective date ____________________ Page 8 of 15
OPERATIONS SPECIFICATIONS
AIRCRAFT MAINTENANCE BOEING 727 Overhaul Inspection Period & Check Period Ice and Rain Protection, Chapter 30, continued O.C. A,B,C,D Thermal Anti-Ice Shutoff Valve 14,000 C,D Thermal Anti-Ice Engine Bleed Check Valve O.C. C,D Leakage check at engine OH Thermal Anti-Ice Duct Temperature Indicator O.C. C,D Thermal Anti-Ice Isolation Shutoff Valve 14,000 C,D Thermal Anti-Ice High Pressure Bleed Shutoff Valve 14,000 C,D Thermostatic Modulating Valve O.C. Calibrate at EO Windshield Wiper Motor 14,000 C,D Instruments, Chapter 31 O.C. A,B,C,D The Maintenance Program (overhaul time and intermediate checks) for this chapter is
to be established in the local Air Carrier District Office for all units in this system including the Flight Recorder.
Landing Gear, Chapter 32 O.C. A,B,C,D Anti-Skid Brake Detector 7,000 B,C Anti-Skid Control Shield 14,000 C,D Brake System Interconnect Valve 14,000 C,D Brake Interconnect Pressure Switch 14,000 C Brake Interconnect Flow Limiting Valve 14,000 C Brake System Accumulator O.C. B,C,D Brake Pressure Indicator, Hydraulic O.C. B,C,D Brake Pneumatic Control Valve O.C. D,FC Brake Pneumatic Pressure Indicator O.C. B,C,D Brake Accumulator & Air Bottle Pressure Gage O.C. B,C,D Brake Accumulator & Air Bottle Pressure Transmitter 14,000 B,C,D Brake Pneumatic System - Hydraulic Transfer Cylinder O.C. C,D Brake Pneumatic Bottle 5 years B,C Brake Deboost Valve 6,000 A,B,C Gear Selector Valve 14,000 C,D Gear Shuttle and Disconnect Valve 14,000 C,D Main Gear Sequence Valve 14,000 C,D Effective date ____________________ Page 9 of 15
OPERATIONS SPECIFICATIONS
AIRCRAFT MAINTENANCE BOEING 727 Overhaul Inspection Period & Check Period Landing Gear, Chapter 32, continued O.C. A,B,C,D Main Gear Brake Anti-Skid Valve 14,000 C,D Main Gear Door Safety Valve 14,000 C,D Main Gear Hydraulic Actuator 14,000 C,D Main Gear Lock Actuator 14,000 C,D Main Gear Lock System O.C. C,D Main Gear Brake Metering Valve 7,000 C Main Gear Door Sequence Valve 14,000 C,D Main Gear Door Actuator 14,000 C,D Main Gear Assembly (shock strut, side strut, drag strut & beam, support links, torsion links, axles) 14,000 A,B,C,D Main Gear Axle Sleeve O.C. Wheel or brake
change Main Gear Wheel Assembly O.C. A,B,C Tire change Main Gear Brake Assembly O.C. B Nose Gear Assembly (shock strut, drag brace strut, torsion links, steering collar) 14,000 A,B,C,D Nose Gear Wheel Assembly O.C. A,B,C Tire change Nose Gear Brake Assembly O.C. B Nose Gear Brake Anti-Skid Valve 14,000 C,D Nose Gear Actuator 14,000 C,D Nose Gear Steering Metering Valve 14,000 C,D Nose Gear Steering Disconnect Valve 14,000 C,D Nose Gear Bypass Valve 14,000 C,D Nose Gear Lock O.C. C,D Nose Gear Lock Actuator 14,000 C,D Nose Gear Lock Retention 14,000 D Nose Gear Variable Restrictor 14,000 C,D Nose Gear Brake Metering Valve 7,000 C Nose Gear Brake Pressure Reducer Valve 14,000 C,D Switch Assembly - Hydraulic Pressure O.C. C,D Cartridge Tail Skid Actuator 14,000 C,D Effective date ____________________ Page 10 of 15
OPERATIONS SPECIFICATIONS
AIRCRAFT MAINTENANCE BOEING 727 Overhaul Inspection Period & Check Period Lights, Chapter 33 O.C. A,B,C,D Oscillating Navigation Light O.C. A,B Rotating Beacon O.C. A,B Navigation, Chapter 34 O.C. A,B,C,D Ammeter - Pitot Static Heat O.C. C,D Airspeed Indicator - Air Data System 7,000 C Air Data Computer O.C. B,C,D Antenna - Glideslope O.C. B,C,D ADF Sense Antenna Coupler O.C. B,C,D ADF Loop Antenna O.C. B,C,D Angle of Attach Vanes O.C. B,C,D Control Column Shaker 14,000 B,C,D
Inertial - Lead Vertical Speed Indicator 7,000 B,C Machmeter 7,000 B,C Mach Air Speed Warning Switch O.C. C,D Marker Beacon Antenna O.C. C,D Pitot Tube Probe O.C. C,D Ram Air Temperature Indicator O.C. C,D Ram Air Temperature Bulb O.C. C,D Static Selector Valve O.C. C,D Stall Warning Computer O.C. C,D Total Air Temperature Probe O.C. C,D Total Air Temperature Indicator 7,000 C True Airspeed Indicator 14,000 B,C,D Oxygen System, Chapter 35 O.C. A,B,C,D Crew Oxygen System Pressure 14,000 C,D Crew Oxygen Demand Regulator 7,000 C Crew Oxygen System Pressure Reducer 14,000 C,D Electro-Pneumatic Continuous Flow Control Unit 7,000 3C Oxygen Bottles 5 Years A,B,C,D Oxygen Bottles, Portable 5 Years A,B,C,D Oxygen Shutoff Valve O.C. D Oxygen System Pressure Indicator O.C. A,B,C Oxygen System Charging Valve 7,000 C Pneumatic Continuous Flow Control Unit 7,000 3C Passenger Oxygen System Latch, Valve and Manifold Assembly O.C. 3C,D Effective date ____________________ Page 11 of 15
OPERATIONS SPECIFICATIONS
AIRCRAFT MAINTENANCE BOEING 727 Overhaul Inspection Period & Check Period Pneumatic, Chapter 36 O.C. A,B,C,D Air Conditioning Airflow Control Valve 7,000 Air Conditioning Airflow Sensing Venturi and Servo Unit 7,000 Bleed Air Heat Exchanger Temperature Controller O.C. C,D Dual Pneumatic Manifold Pressure Gage O.C. C,D Engine Fan Air Modulating Valve 7,000 C Engine Bleed Shutoff Valve 3,500 C Engine No. 2 Bleed Air Shutoff Valve 14,000 C,D Engine Bleed Air Isolation Shutoff Valve 14,000 C,D
Ground Cart Starting Pneumatic Connector O.C. C,D Heat Exchanger - Pneumatic System O.C. C,D High Pressure Bleed Modulating and Shutoff Valve 3,500 C Pneumatic Manifold Air Pressure Transmitter O.C. C,D Water and Waste, Chapter 38 O.C. A,B,C,D Systems shall be maintained "On Condition" Airborne Auxiliary Power, Chapter 49 O.C. A,B,C,D Auxiliary Power Unit - Airborne 1,500 A,B,C APU Exhaust Door Actuator 14,000 B,C APU Fire Bottle 5 years B,C Structures, Chapter 50 7,000 1/4 A,B,C,D Doors, Chapter 52 7,000 1/4 A,B,C,D Emergency Hatches 14,000 1/4 Fuselage, Chapter 53 7,000 1/4 A,B,C,D Fuselage Tension Bolts between BS 360 and 1183 14,000 1/4 Fuselage Skin and Stringer Splices in Crown Area (Stringer S-6 and above) at BS 360, 480, 740, 870, 1080.45 14,000 1/4 Fuselage Center Engine Inlet Duct 2,500 C Fuselage Upper and Lower Torque Boxes 7,000 Fuselage Frames at BS 760.95, 785.95,
804.5, 825.95 and 848.95 7,000 1/2 Center Engine Support 3,000 Effective date ___________________ Page 12 of 15
OPERATIONS SPECIFICATIONS
AIRCRAFT MAINTENANCE BOEING 727 Overhaul Inspection Period & Check Period Nacelles/Pylons, Chapter 54 3,000 A,B,C,D Forward Engine Mount Fittings, Thrust Links and Aft Engine Mount Fittings 3,000 Stabilizers, Chapter 55 7,000 A,B,C,D Horizontal Stabilizer Skin Panel 3,500 B,C Vertical Fin Skin Panels 3,500 B,C Elevator Tab 3,500 B,C
Rudder Internal Structure 7,000 1/4 C Rudder Hinge Fittings 7,000 1/4 B,C Rudder Tabs 3,500 B,C Wings, Chapter 57 7,000 1/4 A,B,C,D Right and Left Wing Upper and Lower Interspar 3,500 B,C Lower Interspar Skin Under Wing Body Fairing and Wing Center Section 7,000 B,C Right and Left Wing Lower Surface at WS 224.5 7,000 C Wing Body Breather Web and BBL 13.0 Beam 7,000 Right and Left Wing Terminal Forgings 7,000 Right and Left Wing Body Bottle Pin Retaining Bolts and Forward Lug Retaining Bolt 7,000 C Main Landing Gear Rear Trunnion Support Beam and Attach Links 7,000 C Wing Trailing Edge Skin and Support Structure 7,000 C Flap Tracks, Carriages, Attachments, and Supports 7,000 B,C Inboard/Outboard Aileron Balance Panels 7,000 C Inboard/Outboard Aileron Adjustable Weights 7,000 C Inboard/Outboard Aileron Tabs 3,500 B,C Engine Turbine, Chapter 72 3,000 A,B,C,D Accessory and Component Drive Gear Box Section 3,000 B Air Inlet Section 3,000 A,B,C Combustion Section 3,000 PP NOTE 1 Compressor Section 3,000 A,B,C Diffuser Section 3,000 PP NOTE 1 Exhaust Section 3,000 A,B,C Fan Discharge Section 3,000 B,C Turbine Section 3,000 A,B,C Basic Engine Plumbing, Wiring, and Linkages 3,000 B,C Effective date ____________________ Page 13 of 15
OPERATIONS SPECIFICATIONS
AIRCRAFT MAINTENANCE BOEING 727 Overhaul Inspection Period & Check Period Engine Fuel and Control, Chapter 73 O.C. A,B,C,D Burner Pressure Sense Line Drain O.C. B,C PP NOTE 4
Engine Driven Fuel Pump 6,000 B,C Fuel Control Unit - Hamilton Standard JFC-60 6,000 B,C Fuel Control Unit Inlet Temperature Sensor 6,000 A,B,C Fuel Strainer (FCU) 6,000 B,C PP NOTE 2 Fuel Deicing System O.C. B,C PP NOTES 2&3 Fuel Flow Transmitter 6,000 B Fuel Flow Indicator 6,000 C Fuel Flow Power Supply Unit 6,000 Pressure Differential Warning Transmitter O.C. B,C Pressurizing and Dump Valve O.C. B,C Plumbing and Wiring O.C. B,C Fuel Heater O.C.
Fuel Deicing Air Valve O.C.
Fuel Pressure Drop Warning Switch O.C.
Fuel Deicing System Filter O.C. B,C Ignition, Chapter 74 O.C. A,B,C,D High Tension Leads 3,000 B,C Ignition Exciter Unit O.C. B,C Igniter Plugs Champion AA72S Continuous Duty O.C. B,C Igniter Plugs Champion AA72S Intermittent Duty O.C. B,C Replaceable Gap Assembly 3,000 B,C Air, Chapter 75 O.C. A,B,C,D Anti-Icing Air System Plumbing and Wiring 6,000 B,C Compressor Inlet Anti-Icing Regulator 6,000 B,C Compressor Inlet Anti-Icing Shutoff Valve 6,000 B,C Compressor Bleed System Valves and Plumbing 6,000 CSD Ejector Air Shutoff Valve 6,000 B CSD Oil Cooler 6,000 B Pressure Ratio Bleed Control O.C. B,C Air Shutoff Valve and Actuator O.C. B,C Anti-Icing Air Regulator O.C. B,C Engine Controls, Chapter 76 O.C. A,B,C Engine Control Linkages O.C. B,C Effective date ____________________ Page 14 of 15
OPERATIONS SPECIFICATIONS
AIRCRAFT MAINTENANCE BOEING 727 Overhaul Inspection Period & Check
Period Engine Indicating, Chapter 77 O.C. A,B,C Engine Vibration Amplifier Unit O.C. C Engine Vibration Indicator O.C. C Engine Vibration Pickup @ E.O. B Exhaust Gas Temperature Probes O.C. C Exhaust Gas Temperature Indicator O.C. C Exhaust Pressure @tio Probes and Plumbing O.C. A,B,C Engine Pressure Ratio Transmitter E.O. C Engine Pressure Ratio Indicator O.C. C Tachometer Generator E.O. B Tachometer Indicators N1 and N2 O.C. C Exhaust, Chapter 78 O.C. A,B,C Directional Valve Assembly 6,000 A,B Thrust Reverser Actuator O.C. A,B Thrust Reverser Assembly O.C. A,B Thrust Reverser Sequence Valve E.O.
Thrust Reverser Indicating System Oil System, Chapter 79 O.C. A,B,C Oil Tank and Stick Quantity Indicator O.C. A,B,C Oil System Plumbing and Connections, Drain Valve E.O. B,C Fuel and Oil Cooler and Temperature Regulator E.O. B,C Engine Oil Pressure Transmitter E.O. B Engine Oil Pressure Indicator O.C. C Oil Quantity Indicator O.C. C Oil Quantity Tank Unit O.C. B Low Oil Pressure Switch O.C. B Oil Filter Bypass Switch E.O. B Oil Temperature Transmitter O.C. B Oil Temperature Indicator O.C. C Oil Strainer O.C. B,C Starting System, Chapter 80 O.C. A,B,C Pneumatic Starter 6,000 B,C Starter Pressure Regulating and Shutoff Valve 6,000 B,C Effective date ____________________ Page 15 of 15
OPERATIONS SPECIFICATIONS
AIRCRAFT MAINTENANCE BOEING 727
POWERPLANT NOTES
NOTE 1. Access for inspection is impeded by engine fan duct.
Specific instructions will be established by carriers to assure that flight crews are aware of indications of hot section case distress.
NOTE 2. Filters should be cleaned within 150 hours.
NOTE 3. Filter should be sampled daily on new aircraft or after tank repairs until residual is disposed of.
NOTE 4. Drain at "B" check.
Effective date ____________________ ---------------------------------------------------------------- ---------------------------------------------------------------- FIGURE 39. OPERATIONS SPECIFICATIONS AIRCRAFT MAINTENANCE - DOUGLAS DC-9 UNITED STATES OF AMERICA Form Approved FEDERAL AVIATION AGENCY Budget Bureau WASHINGTON NO. 04 R075.
Page 1 of 10
OPERATIONS SPECIFICATIONS
AIRCRAFT MAINTENANCE DOUGLAS DC-9 Inspection/Check Requirements Checks shall be accomplished in accordance with the applicable procedures as listed in the airline's maintenance manual.
"A" Inspection/Check * To be accomplished at intervals not exceeding fifty (50) hours time in service.
"B" Inspection/Check * To be accomplished at intervals not exceeding three hundred (300) hours time in service.
"C" Inspection/Check * To be accomplished at intervals not exceeding nine hundred (900)