Boeing B737 New Gen IGW landing gear t.+44 (0)1332 855263

We are unique in having a full shipset of all three landing gears now available for exchange or lease at low hours and cycles in fully overhauled condition with all the latest SBs included. Our exchange and overhaul programme is now offering 654A0011-49 main gear, 654A0011-50 main gear and 654A0012-12 nose gear and also for this aircraft, new gen slat actuators and new gen retract actuators 273A2101-5. All stock is maintained in serviceable ready-to-ship condition.

Boeing 737 NG/BBJ avionics

Next generation NG BBJ and Boeing Classic avionics include FMC, MCP, IRU, PSEU, FSEU, flatpanel display and pressure control.

The FMC was introduced with the 737-300 in 1984 and contains a performance database and functions, but also added a navigation database which interacts with the autopilot & flight director, autothrottle and IRSs. The integrated system is known as the Flight Management System (FMS) of which the FMC is just one component. Most aircraft have just one FMC.

The MCP is another of the flight deck controls. The Mode Control Panel can manipulate the three main factors of flight:  Speed, Heading, and Altitude.  Inside every field of the MCP are two numbers.  The upper number is the aircraft's current value, and the lower number is the aircraft's target value.

The IRU is for position updating, the inertial reference unit. The PSEU proximity sensor electical unit communicates the position or state of system components eg flaps, gear, doors, etc to other systems. 737-NGs are fitted with a PSEU which controls the following systems: Take-off and landing configuration warnings, landing gear transfer valve, landing gear position indicating and warning, air/ground relays, airstairs & door warnings and speedbrake deploy warning.

On the NG's the FSEU will detect an asymmetry at the trailing edge flap position transmitters at a level which is almost undetectable by eye. In any series of 737, if an asymmetry is detected, hydraulic power is removed. The NG FSEU will also detect a flap skew, if detected the flap position indicators will display a 15 degree split.  Flat panel displays provide liquid crystal displays that offer a ten-to-one improvement in reliability as well as a platform for growth.

What has happened with oder aircraft is that existing instrumentation is increasingly difficult to support as the products are no longer in production, and parts acquisition and repair becomes increasingly more expensive. The 737NG pressurization schedule is designed to meet FAR requirements as well as maximize cabin structure service life. The pressurization system uses a variable cabin pressure differential schedule based on cruise altitude to meet these design requirements. The 737NG pressure control plays an important role.

The BBJ pressure control is certified to a reduced cabin altitude increasing passenger comfort.

B737 NG/BBJ electrical 28B545-7 starter generators, 3505945-10 starters, 761574B idgs integrated drive generators, 4082260-937 mode control panels and 7121-19971-01AC cabin pressure controllers. GCU generator control unit, BPCU bus power control unit for transfer of busses, the point of connection for the power sources (engines/APU/GPU), heavy essential loads eg hydraulic pumps and galley busses.

The standby rudder power control unit (SPCU).

B737 NG/BBJ hydraulics

Spoiler and slat actuators, control valaves, landing gear retract lock or steering actuators, thrust reverser actuators, rudder PCUs

and HMUs, hydro mechanical units.

B737 NG/BBJ pneumatics include regulator valves, tai valves, precooler valves, start valves, apu bleed valves and Honeywell high stage valves.

Pressure regulator valves are spring loaded in the valve open

direction. Inlet pressure is admitted through restrictor orifices to the actuator piston chambers. When the pressures in both

chambers are equal, the actuating mechanism tends to open the valve.

Thermal anti-ice valves, the TAI valves are located at the 1:30 o'clock position (aft looking forward)

on the fan frame, line mounted in the TAI ducting and is secured with V-band couplings. The valve is air operated and is set to regulate outlet pressure at 50 |3 psi. The valve is fully open at inlet pressures of 10 to 47 psi. The unit consists of a normally closed butterfly shutoff valve, a normally open pressure regulator butterfly valve, a servo pilot valve and associated components which form an insulated air duct section. If the pressure regulator valve fails to regulate the pressure, the shutoff valve will maintain the pressure at 75 |10 psi.

Whe precooler control valves don't work, do inspections under the engine thrust reversers, take a look at the precooler control valve control line, found on the LH side above the engine. The control line can be positioned against the bracket, causing a chafed/damaged line, which results in a precooler valve not closing. So make sure the line is free from the bracket and not damaged.

Finally, other B737 NG BBJ compliant parts with current ADs and SBs include flap tracks, flight controls, fore flaps, mid flaps, aft flaps, elevator tabs, spoilers, engine cowls, leading edges, flap transmissions and cargo doors.

B737 BBJ Rotables

BBJ1 BBJ2 BBJ3 Spares available for Exchange loan or sale

The BBJ1 is similar in dimensions to the 737-700 but with stronger wings and landing gear from the 737-800. It has increased range with extra fuel tanks. In 1999, a year later, Boeing launched the BBJ2. Based on the 737-800, it is 5.84 metres longer than the BBJ1, with 25% more cabin space and twice the baggage space, but has slightly reduced range. It is also fitted with auxiliary belly fuel tanks and winglets. The Boeing BBJ3 is based on the 737-900ER. More floor space, 35% more interior space and 89% more luggage space than the BBJ2, it has an auxiliary fuel system, giving it a range of up to 4,725 nautical miles (8,751 km), and a Head-up display . B

Rotable spares include BBJ avionics...

The BBJ bridges the gap between airliners and business jets, having all the flight deck systems available to airlines operating the 737, while serving as a showcase for advanced business jet avionics.

Boeing use the BBJ as a test bed for commercial 737 flight decks.

Enhanced vision systems (EVS) with a forward-looking infrared (Flir) camera allows pilots to look through a head-up display (HUD) to see Flir imagery of a runway at night and in smoke, haze, rain and snow.

The BBJ also has the Rockwell Collins HGS-4000, called the -4000E, a head-up guidance system with new hardware and software to allow the display of video imagery from the Flir camera. The BBJ has head-up guidance for the pilot as a standard feature, while the system is optional on the 737NG.

Honeywell cockpit displays using synthetic vision, retrofit items of various kinds are all benefitting from the common platform.

BBJ hydraulics and pneumatics spares, landing gear spares and CFM56-7B27 turbofan engines spares are similarly advanced products...

The aircraft has hydraulically operated retractable landing gear.

The twin nose wheels retract forward and the main units retract inwards. The main landing gear wells have no doors but instead the wheels form the wheel well seals that are visible on the underside of the fuselage towards the trailing edge of the wing. The landing gear is equipped with oleo-pneumatic shock absorbers supplied by Boeing and either Honeywell or Goodrich heavy duty wheel brakes.

Other aircraft catered for are airbus rotables for A318 A319 A320 and A321 and BAe 146 flying surfaces.

Parts procurement budget

The important things to remember about KG Aircraft Rotables is that firstly, they are part of  Kanematsu Aerospace, so have the kind of financial backing that allowed them last year to spend 10 million $US on parts procurement. Secondly, their sister company KG Aircraft Leasing are owners and operators of these same aircraft, giving the company unrivalled expertise in their products.

KG Aircraft Rotables Co Ltd   www.kgar.com

UK Office and Distribution Centre

Building 21, Vanguard Road,

East Midlands Airport,

Castle Donington

Derbyshire DE74 2SA. UK

Tel: 44 (0) 1332 855263, Fax: 44 (0) 1332 853477

AOG: 44 (0) 1332 855263

Sales

Sales & Marketing Manager ­ Mike Hodgkinson

mike@kgar.com