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2. The Boeing 737 Exterior InspectionThis presentation coversthe Boeing 737 (Classic & Next Generation)pre-flight Exterior Inspectionaccording the Boeing FCOM Normal Proceduresand Cold Weather Supplementary Procedures. For training only, do not use for operation ! Always use your company publicationsas sole official source ! Reference :Boeing 737 FCOMDecember 2009 Legend : (CL) = Classic (NG) = Next GenerationSlide 2 3. The Boeing 737 Exterior Inspection This presentation requires Microsoft PowerPoint 2003 or XP. Animation will be incorrect and part of the text will be unreadable when using an earlier version of PowerPoint. You can download and install the free MS PowerPoint 2003 Viewer This free Viewer allows you to view all presentations created by PowerPoint 97 till 2003 without interference to another PowerPoint development program installed on your PC. The Viewer is supported by Windows 2000 SP3 Windows XP Windows ME Windows 98 SE (requires computer restart) Windows Server 2003 If you have another PowerPoint development program installed on your computer, this program will take precedence to the MS PowerPoint 2003 Viewer. Therefore, you must : 1- download this presentation to your computer 2- from the Start Menu under All Programs, open the Microsoft Office PowerPoint Viewer 2003 and open this presentation file.Slide 3 4. The Boeing 737 Exterior InspectionThis 40 slides presentation comes withover 100 pictures and lots of extra information.Whether you are a newbie to the 737or an experienced Boeing 737 captain,you will certainly discover interesting itemsDont run through this presentationclick-click-click-click-click-click Instead, prior to viewing the next page,challenge yourself what am I looking forwhen Im doing the exterior inspection myself ?and find-out that you may be overlookingsome important safety items !Slide 4 5. The Boeing 737 Exterior InspectionThis presentation is dividedinto 4 chapters : 1- General Guidelines2- The Walk Around3- Cold Weather Operations4- Top 10 BlundersSlide 5 6. General guidelines 7. The Boeing 737 Exterior Inspection General guidelines General Guidelines - Surfaces and structures must be clear, not damaged and not missing - Fluids should not be leaking - Tires should not be worn, not damaged and no loose treads - Gear struts should not be fully compressed - Engines inlet and tailpipe should be clear, access panels should be secured, the engine exterior should not be damaged and the reverser must be stowed 8. The Boeing 737 Exterior Inspection General guidelines General Guidelines - Doors and access panels (that are not in use for servicing) should be latched - Probes, vents and static ports must be clear and not damaged - Antennas may not be damaged - Light lenses should be clean and not damaged 9. The Walk-aroundExterior Inspection Normal Procedures 10. The Boeing 737 Exterior Inspection The Walk-Around Left Forward Fuselage Left Forward FuselageAn unaspirated TAT probe (recognizable by itsperforation and a large hole at the rear of the strut)indicates a valid OAT on ground only when probeheat is OFF and after sufficient cooling time. Exterior Inspection Probes, sensors, ports, vents and drains .. Check Doors and Access Panels (not in use) LatchedEspecially on (CL) make sure thepitot tubes and alpha vane are not Additional Information damaged by the passenger bridge.On (NG) these probes are movedforward. Aspirated and non-aspirated temperature probe.. Exterior Emergency Exit Lights Now, what are you looking for lightsThe exterior emergencyat this location ? interiorsimultaneously withilluminatetheemergency exit lights.An aspirated TAT probe delivers anExterior emergency lights areaccurate temperature measurementinstalled next to each entry/service (we need 2 items here) on ground. This probe is cooled bydoor, overwing exits and behindAPU bleed air from the leftthe wing root (picture).pneumatic duct. 11. The Boeing 737 Exterior Inspection The Walk-Around Nose Nose Exterior Inspection Radome .. Check Forward E&E Door .... Secured The radome is made of composite materialAdditional Information for operation of the WX radar. Six diverter strips transmit static build-up during normal flight. the nose mayalsoLightning impact on These strips puncture Noise vortex Generators .. decrease energydestroy the radome. to theor exceptionally and prevent damage There After each lightning strike or bird strike, theare two E&E access doors. This pictures ILS and WX antenna (located inside the showsradome requires maintenance inspection. the forward E&E door. The forward door radome) in the event of a lightning strike. provides access no the WX radar and PSEU (NG).Even with to apparent damage on the The forward E&Efrom January 2005,E&E door beoutside, thedoor and the main may still Ascomposite material What are you looking fordamaged (delaminated) well) arethe nose wheel on the inside ! (located aft of Noise Vortex Generators guardedare by a single EQUIP amber (NG)on the flight deck. installed on light to reduce theat this location ? flight deck ambient noise level by 3 decibel.(2 items) 12. The Boeing 737 Exterior Inspection The Walk-Around Nose Wheel Well Nose Wheel Well Exterior Inspection Tires and wheels ... Check Gear strut and Doors Check Exterior Light .. Check Nose Wheel Steering Assembly . Check Nose Gear Steering Lockout Pin . As neededInspection Flood This is not the Gear Pin .. indicates the Dome Light. The red line As needed light, but the maximum tow (CL)angleInspection Flood light bar The Nose Wheel Spin Brake (snubbers) ........ In place is a NOGO (for tow truck drivers) aft wall) (on theNose wheelShimmy Dampersfor night flight ! requirement As a general rule, 3 fingers (that isAdditional Information Picture (CL) showing both the Nose Gear Steering What are you looking for 5 cm or 2 inches) of polished portion Lockout Pin (lower left) and the Gear Pin (top) of the strut should be visible.inside and around Nose Wheel Well Inspection 737-800 are sensitive to Check Some Flood Light........... tail-tipping. You may notice up tothe nose wheel well ? (CL) Nose Wheel Down 2 hands during off-loading. & Locked marking....... Check Nose Wheel Steering cable assembly Check (NG) PictureNose Wheel(7 items) Ground Crew Horn 13. The Boeing 737 Exterior Inspection The Walk-Around Right Forward Fuselage A diverter strip above each Service/Entry Door guides away rain drops rolling down from the fuselage. Right Forward Fuselage Exterior Inspection Probes, sensors, ports, vents and drains .. Check Doors and Access Panels (not in use) The Crew Oxygen Bottle ground touchedLatched avionics may not be wiredThesewithout carrying the Oxygen Pressure Relief Green Disc ....Although located in which youservicing Theplaceglove, the E&E, find stored In APU starterhandconverter unit E&E entry door ! near the and removal are done via the forward cargoP91 resetand compartment.Additional InformationCircuit Breaker only) (CL Forward Toilet Service Door E&E Access Door ...Closed the F/O Window Verify that E&E Outflow Valve ..Check AirflowHandle ishere The Light Switch is located flush. Escape Lets take a look inside the E&E (NG) What are you looking for The Main Batteryat this location ?Dont call maintenance for a missing screw or bolt ThisThe GND is the outlet for the watertiny hole SERVICE Bus drain flexiblepoweredthe flight deck, must be tube on for the(3 items)you EQUIP Cooling Normal on (CL) know, that annoying tube when you close theoperate Exhaust fan to sliding window 14. The Boeing 737 Exterior Inspection The Walk-Around Right Wing Root, Pack and Lower Fuselage Right Wing Root, Pack and Lower Fuselage The ATC 2 antenna Exterior InspectionThe Cargo Compartment Access Panel allowsHowever, the light in the forward and aft cargoyou to enter the forward cargo compartment door openings come without a lens cover. Ram Air Deflectorfrom the passenger cabin. This panel isExtendedDoor .. located A missing or cracked lens cover must beon the right hand side of the passenger cabin Pack and Pneumatic the 10th (737-6/700) ... Secured must benear Access Doors 13replaced or the light bulb th (737-8/900)window cutout row E, below removed,carpet.the floor as shown here. (MEL 33.04) Probes, sensors, ports, vents and drains .. CheckDo not enter the cargo compartment in case of Exterior Lights is Connectionthe cargoa (spurious) smoke/fire warning. The panel Check This connectionGround PneumaticBefore closing-upPneumatic Manifold Duct). (into rightcompartment, make sure youinstalled for the event that luggage is blocking Leading Edge Flapscargo door handle. is located ondontright-hand side of thethe. Check him theforget about airplane because the ground engineer isTank Vent Inlet(400) Auxiliary Fuel headset-connected on the same side.Additional InformationWith hydraulic system B unpressurized, the Antennas CheckLE Krueger flaps may droop.Never grasp a LE Flap with your hands, Cargo Hold Lighting..Check Lens What are you looking forbecause the flaps slam upwards if your fellowpilot on the sure there is no protective cover !Make flight deck pressurizes system B (NG) Cargo Hold Access Panelalong this side ?on the static ports. (CL) Auxiliary Fuel Tank Vent.. inletarefree of FOD,Protective covers are installed for theMake also sureThese 4 flat antennas isseveral reasons, including maintenance, Landing Lightincluding clothing stowed away by (NG) Retractable(5 items) painting, washing or ground personnel Air 1 and summer day. (into the Ground the Radiothe inleton a hot 2 to protect Altimeter Connection (Pack)Pre-conditioned Antenna VHFagainst insects duringTransmitter of the Groundconnection is located a stopover.and Receiver Pneumatic Main Distribution Manifold). The COMM 2 ConnectionDetail (CL) on the left-hand sideon the (NG) COMM 3 the airports(Pack) of the left-hand sinceairplane, side air-conditioning system is integrated into the jetway. 15. The Boeing 737 Exterior Inspection The Walk-Around Airconditioning Bay Airconditioning Bay Ram Air InletsWhile we are here, lets take a brief lookinside the airconditioning bay.The airconditioning bays are locatedon each side of the wing roots, forwardof the main wheel well. The air-cycle machineThe Water Separator The right pack heat exchangers. Air conditioning Outlet Outlets 16. The Boeing 737 Exterior Inspection The Walk-Around Number 2 Engine Number 2 Engine Exterior Inspection Access Panels notice an engine oil leakageIf you Latchedduring the pre-flight exterior Probes, sensors, ports, vents and drains inspection, call maintenance. .. Check Fan Blades, Probes and Spinner Check number ofThe maximum alloweddrops per minute differs by engine Thrust Reverser ... Stowedsection.type and by engine Exhaust area and Tailcone .. CheckAdditional InformationAlignment of these black indicator Generator Drive Oil systemstrips indicate proper stowage of to call You dont needthe left and right thrust reverser missing bolts. maintenance for Oil leakage....Checkfocusholes are used to rear What are you looking forsleeve. If view within limit These on this frame A you into the engine from the with detach the the engine (open).seconds, nosefor hotcone. for 5the reverser deployed surfacesCautionat this location ?fan starts toafter recent flight rotateA small puddle T12 Total Inlet Temperature Sensorof oil in the engineexhaustThe oil level indication has a different of a red locking plug is acceptable. will notice the top(5 items)YouA large puddle may cause heavy ifenginescale for the left pin here smokeand right the reverser is dispatchedand exceptionallyof the wing fire up tobecausea tail pipe dihedral inoperative (locked).10 minutes after engine shutdown. 17. The Boeing 737 Exterior Inspection The Walk-Around Right Wing and Leading Edge Right Wing and Leading Edge Picture of cold soaked fuel frost on lower wing surface. This picture is taken after descent Exterior Inspection in VMC and landing at an airfield with ambient Dont call maintenance to temperature above 35 C / 95 F !!Access Panels notice there is no ice on the flaps ! fuel Also Latched Defined cold-soaked report holes in the leading edge ! These holes serveLeading Edges Flaps and Slats . Check frost area painting (NG) as wing anti-icing air outlet ! Fuel Measuring Sticks .. Flush and secure Wing Surfaces .. Check Fuel Tank Vent . Check (NG) Do you recall the Cold soaked Fuel Frost Limits ?Additional InformationThe defueling bay door cannot be Lower Wing :Max. 3 mm or 1/8 inch if the defueling valve is open.closedThis valve is Wing anti-icing Wing Anti-Ice Exhaust .duct manually operated Only on the wing itself, not(shown here).on theby a handle air supply flight controls, LE/TE Flaps/Slats What are you looking forwinglets. and not onalong the leading edge Upper Wing : Max. 1,5 mm or 1/16 inch Pressureof the right wing ? > 0C or Poppet is flush with the wingOAT Check that Flame Arrestor Valve 32F lower skin.No visible moisture If the valve is popped wing inwards, it(5 items) Only within thereset by maintenance. must be painted areaLE slats actuatorSimilar on both wings (!) 18. The Boeing 737 Exterior Inspection The Walk-Around Right Wing Tip and Trailing Edge Right Wing Tip and Trailing Edge Exterior InspectionPicture (NG) : The deflection ofthe flight spoilers deploy is less than Position and Strobe Lights ... Checkthe ground spoilers.On NG with the SFP (Short Field Static Discharge Wicks . Check installed, thePerformance) option Aileron and TE Flaps .angle is further increased.deflection CheckAdditional Information Any idea about the number of static Flight and Ground Spoilers dischargers installed on each wing ? Main Wing :4 MEL 33-11 is rather complicated due to WhatWing (with looking different plastic lenses (single or dual)Main are you blended winglets) : 2 forat this location ?and winglets installed or not. As a general rule at least one red and Horizontal Stabilizer : 3 one green navigation light must operate for night flight.(3 items)This picture shows a 737-800 with a dual Vertical Stabilizer : 4 plastic lens and blended winglets. 19. The Boeing 737 Exterior Inspection The Walk-Around Right Main Gear Right Main Gear Exterior Inspection Tires, Brakes and Wheels ... Check Gear Strut, Actuators and Doors Check Gear Pin .. As needed Hydraulic Lines . Secure tire wear limits Refer to your company manuals and procedures foror call maintenance.Additional InformationAs a general rule, the strut should beextended by 3 fingers with passengers Brake Temperature.and fuel loaded. brake wear indicator pinIf one is missing, the brake can stay in service if operation of theThe aircraft can be pin is satisfactory. remaining dispatched withParking brakes must set in order to check What are you looking forone, two If aall three main landingor pin is broken, just considerthe brake wear indicator pins.gear doorsmissing Refer to the it option) (NG missing. both brake pins flush, theWith one orat the right main landing gear ?DDG-CDL forTemppenalties and MFD Brake fuel display on the rejected takeoff.brakes can still handle onemaintenance actions.According to the Maintenance Manual AMM32-41 you may not leave with a flush pin.(4 items) Check your company SOP. 20. The Boeing 737 Exterior Inspection The Walk-Around Right Main Wheel Well Right Main Wheel WellWhen the hydraulic fluid return filter is Exterior Inspection Thisclogged, a like a hydraulic pressure may look red differential fluid leakindicator will appear on top of the filter APU Fire Control Handle ....F).the uses over-(if OAT isMLG uplock mechanism The above 2 C 36Up However, what locking toindicator, call fitting is broken, (NG) IfThe flightyou notice thesee here is the main landing center you red with anIf can be dispatched keepboth (NG as installed) NGS light ...theTwo be raised after takeoff.Checkmain wheel gear (dome) lights inoperative landing gear anti-corrosiveup and locked. associated hold thewell protection compoundmaintenance springs cannot locked position. Anyway, uplock hook in doubt, andif there is any the up Wheel Well .. Check disappeared (CL) an inoperative inspection call maintenance. It has happened that a spring However, on The FCOM does not specify what to check, (if you found it in your garden, is a NOGO for night flight ! in flight please return to company) flood light (two installed one for each gear) so here are some suggestions : - General condition (no loose cables, no fluid leaks) - Hydraulic System Quantity, Pressure and Filters - Landing Gear Up-Lock system What are you looking for System both the Fire Handle and the - (CL) Landing Gear Viewing Verify that Bottle Discharge Switch are safety wired.in (NG)Right Main Wheel Well ? - the Loose Thread Frangible FittingVerify that the operability green indicator light is illuminated, unless the NGS is(6 items)dispatched inoperative. 21. The Boeing 737 Exterior Inspection The Walk-Around Right Main Wheel Well Inside the Main Wheel WellThere is a relatively large empty space Additional Information next to and aft of each flap transmission. The F/O Flight Control Spoiler quadrant,It can even hide aspoiler Mixer, mountedThe stowaway. Alwaysworth a double check through cables connected with the F/O should be The handle on the forward sideon the forward wall. A short guided tour insideflight deck control wheel wired and pointing upwards. The handle is the Main Wheel Well : for maintenance only. If the handle is rotated, the engine reverser is de-activated(NG) This is the centertank boost pump.The CAPT Flight Control aileron quadrant,You can find six of thesethrough cables connected with the Captains mounted in the forwardflight deck control The TE Flaps hydraulic systemand thewheelThis is the motor A EMDPwall. (Electric Motor Driven Pump).alternate electric motor are integratedin the same housing on the aft wall ofthe wheel well. Both motors drive theTE flaps through common orange/black Mounted on the forward part of the system B EMDP Bpainted shafts. is This Hydraulic system the keel beam, this is the (Electric Motor Driven Pump).PTU.reservoir pneumatic The systemair EDP (EngineB pressure indicator Driven Pump) is located inThe accumulator brake Engine 2 of course. This this indicatorpressure Thrust Reverser Control Valve (NG) TE Flap Transmission : hydraulic system reservoir The Standby is theunit transmits power from the orange/black keel beam. for Engine 2. is located on the center torque shaft to the TE flaps for(NG).side. This picture is that So, there are two of these beastsHydraulic system B installed in the wheel well. Pressure Module 22. The Boeing 737 Exterior Inspection The Walk-Around Right Aft Fuselage Right Aft Fuselage Exterior Inspection Doors and Access Panels . Latched Negative Pressure Relief Door .. Closed Compartment(NG) Aft Cargo Outflow Valve . CheckBehind this bulkhead is the toiletAntenna VHFwaste tank and the compressor. Probes, sensors, ports, vents and drains .. Check (CL) COMM 3 APU Air Inlet Open (NG) COMM 2 (CL) APU Fire Bottle ..... Check (CL) Verify that the Squib Discharge disc (yellow)Additional Information looking What are youforand the Bottle Overpressure disc (red) are in placealong the aft fuselage ? recent delivered (NG) the main service panel is located onOnThe water Toilet Waste System..right side (NG) left side (CL) of outflow valve comes with teeth totheVerify the cargo compartment entry picture is (NG).(6 Comm NG) (7 items reduce aerodynamic noise. the airplane. This VHF items -Antenna..toilet service panel is located on CL) for any dents Thethe opposite side, with an extra toiletaccess panel in the front (CL). 23. The Boeing 737 Exterior Inspection The Walk-Around Tail TailAPU Cooling Air Inlet Exterior Inspection Vertical Stabilizer and Rudder .... Check Horizontal Stabilizer and Elevator .. Check Elevator Feel Probes Check (400-800-900) Tail Skid ... Check Static Discharge Wicks .... Check Strobe Light Check APU Cooling Air Inlet and Exhaust Outlet . Check What are you looking foraround the tail ?(8 items)APU Exhaust Outlet 24. The Boeing 737 Exterior Inspection The Walk-Around Tail TailLocation of the VOR/LOC antennaAdditional Information The famous Stab Logo Light trim jackscrew Horizontal Stabilizer-to-Body Sliding Seals Antenna HF and VOR The APU inletsteering cables, The rudder door as seen from theNow, lets take a look, where you have inside. This here isflight deck door connected to the the electric actuator. pedals.never been before, inside the tail cone :rudder Stabilizer Trim system .. APU Inlet Door system .Location of the HF antenna APU Fire Extinguisher system . or lower seal isIf the upper The electric Stab trim actuator maintenance.missing, call Other When dispatched with theseal removed, apply theperformance weight penalties (NG) The logo light is powered fromfrom the DDG / CDL.The Stab trim Main Bus 1. Hence the logo lightscontrol cable drum.The cables are connected to the The aft pressure bulkhead isilluminate with the CAB/UTIL do notflight on 737-100 thruin OFF! hemispheric switch 800 deck manual trim wheels. and flat on the 900 25. The Boeing 737 Exterior Inspection The Walk-Around Left side Left side Differences with Right Side As a general rule both pressure indicators should point upwards. Left Aft Fuselage : When you return to the flight deck, may tend slightly to the left They on cold days and slightly to the right(NG) Waste Compressor Vent. Check Very often,days as pressure inside the take a look at these drains. on hot the drains are clogged ! bottles changes with OAT. These drains guide away rain water thathas entered the cabin through the Left Main Wheel Well :associated door. A clogged drain mayFire Discharge Bottles .... Check into the E&E, cause rain water to seep causing damage to electronics. During the exterior inspection Additional Informationyou may notice the sound of the vacuum compressorEntry / Service Door Floor Drains . toilets.cabin crew flushes when the the Check What additional itemswill you be checking A malfunctioning air/waste separator may direct wasteon the left side of the airplane ?to the air outlet i.s.o. towards the waste tank(2 items - NG) (1 item CL) So here is a good advice : stay away from this hole ! 26. Cold Weather OperationsExterior Inspection Supplementary Procedures 27. The Boeing 737 Exterior Inspection Cold Weather Operations Pay extra attention to the following items : Surfaces Check Control Balance Cavities Check Pitot Probes and Static ports . Check Air Conditioning Inlets and Exits Check Engine Inlets . Check Fuel Tank Vents ... Check Landing Gear Doors .... Check APU Air Inlets ... Check 28. The Boeing 737 Exterior Inspection Cold Weather OperationsSome Pictures :Clear ice on the leading edgeIce formation on the engine fanafter a short taxi time Ice formation in the engine inletIce formation on the pitot tubes 29. Top 10 Blunders !In fact, we can as well start withthis classic one :Tools or an oil can accidentallyleft behind in the main wheel wellby maintenance personnel. 30. The Boeing 737 Exterior Inspection Top 10 Blunders Number 10 How about these 3 tools? General condition OK ? 31. The Boeing 737 Exterior Inspection Top 10 Blunders Number 9 A large dent in the fuselage may easily go unnoticed 32. The Boeing 737 Exterior Inspection Top 10 Blunders Number 8 Dont tell me I didnt warn you ! 33. The Boeing 737 Exterior Inspection Top 10 Blunders Number 7OK, whats wrong here ? (NG) The main gear frangible fitting may never be used to attach the fuel truck ground wiring cable ! 34. The Boeing 737 Exterior Inspection Top 10 Blunders Number 6 There is no potential danger that the door opens in flight when the Z-Handle is not correctly stowed. However, you will probably experience additional ambient noise in flight 35. The Boeing 737 Exterior Inspection Top 10 Blunders Number 5OK, whats wrong here ? This rod is broken, so you will be flying with the right nose wheel well door open 36. The Boeing 737 Exterior Inspection Top 10 Blunders Number 4 During the walk-around in heavy rain, you may perhaps not be looking upwards and these missing access panels from the Horizontal Stabilizer may go unnoticed Furthermore, always pay extra attention to access panels when the airplane is being returned from maintenance. 37. The Boeing 737 Exterior Inspection Top 10 Blunders Number 3 Anything wrong here ? (CL) While the gear pin may have drawn your attention, you should also have noticed that the red painting is missing and/or covered with lubricating oil This is a NOGO ! 38. The Boeing 737 Exterior Inspection Top 10 Blunders Number 2 This engine looks in good shape ? You caught a bird into the N2 compressor during landing. This may go unnoticed, especially during a night time walk-around without carrying a flash-light 39. The Boeing 737 Exterior Inspection Top 10 Blunders Number 1 The (smaller) main wheel of a Boeing 737-500And our Number 1 winner mounted on the Boeing 737-400today is ??? So, always take a look to the wheels ! 40. The Boeing 737 Exterior Inspectionthe end -for more information www.B737MRG.netwww.B737.org.uk Have asafe flight ! Slide 40
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