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AVIATION / Airframe & controls / REVIEWED 2026-09-11

A04Flight-control surfaces

Change lift, pitch, roll, and yaw.

Manufacturers & products

Ailerons, elevators, rudders, slats, flaps and spoilers have distinct aerodynamic functions. This category covers the surfaces; motors, hydraulic actuators and control electronics are separate.

Program applicability is stated for each listing. 737NG, 737 MAX, and other aircraft examples are distinct configurations; listed products are not automatically interchangeable or approved for installation.

manufacturer

Mitsubishi Heavy Industries

737NG inboard flaps

MHI identifies itself as manufacturer of the 737 inboard flaps on its Next-Generation 737 product page. [4]

Program / application

737NG — documented inboard flaps [4]

Custom program inquiry

Contact the manufacturer or aircraft OEM for the applicable approved program and configuration. This is an inquiry route, not an assertion of stock, price or installation eligibility.

Product scope & qualifications

Aircraft dimensions on this page describe a 737-700, not flap dimensions and not a 737-800 assembly specification.

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manufacturer

Saab

A320-family ailerons

Designs and produces A320-family ailerons; this is a distinct work package from wing structure. [5]

Program / application

Other aircraft — A320 family; no 737 applicability established [5]

Custom program inquiry

Contact the manufacturer or aircraft OEM for the applicable approved program and configuration. This is an inquiry route, not an assertion of stock, price or installation eligibility.

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manufacturer

GKN Aerospace

Wing control surfaces

Provides wing control-surface engineering and manufacture. [1]

Program / application

General control-surface capability; 737 applicability unverified [1]

Custom program inquiry

Contact the manufacturer or aircraft OEM for the applicable approved program and configuration. This is an inquiry route, not an assertion of stock, price or installation eligibility.

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manufacturer

Aernnova

Rudders and elevators

Designs and manufactures movable surfaces, including rudders and elevators. [2]

Program / application

General control-surface capability; 737 applicability unverified [2]

Custom program inquiry

Contact the manufacturer or aircraft OEM for the applicable approved program and configuration. This is an inquiry route, not an assertion of stock, price or installation eligibility.

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manufacturer

Leonardo

767 wing movables

The cited disclosure identifies 767 ailerons, slats and spoilers. [3]

Program / application

Other aircraft — 767; no 737 applicability established [3]

Custom program inquiry

Contact the manufacturer or aircraft OEM for the applicable approved program and configuration. This is an inquiry route, not an assertion of stock, price or installation eligibility.

View product & inquiry route

What remains unverified

Surface dimensions, load limits and allowable repair sizes are largely controlled program information.

Where it comes from

A company address is shown separately from a published factory location. Request the manufacturing site and lot traceability for the exact part when sourcing.

What to compare

Surface function
Identify roll, pitch, yaw, lift augmentation or lift-dump duty.
Travel and kinematics · deg / mm
Hinge geometry and deployment path determine clearances and authority.
Aerodynamic hinge moments
Use actual speed and load cases when sizing the surface and drive.
Mass and balance · kg
Compare inertia and balance tolerances that influence flutter.
Stiffness
Deflection under aerodynamic load affects response and aeroelastic behavior.
Hinges and attachments
Verify fitting, bearing and actuator interfaces.
Position sensing
Identify separate transducers and the required indication/fault coverage.
Inspection and repair
Review erosion, impact, bearing wear and structural repair limits.

Selection & integration notes

A confirmed MHI flap relationship does not imply MHI supplies every 737 flight-control surface.

Published product examples

2 REFERENCES

Specifications belong to the named product and configuration.

737NG inboard flapMitsubishi Heavy Industries

Public source establishes the product/work package, but does not publish comparable component mass, load limits or envelope. Request controlled drawings and configuration data through the aircraft program.

Example sources [4]

A320-family aileronSaab

Example sources [5]

Sources & references

REVIEWED 2026-09-11

Manufacturer pages and technical documents support the linked claims. A review date is not a publication date or stock check.

Aerostructures GKN Aerospace · Publication date not stated
Fuselage, wing, control-surface and empennage capabilities; named business-jet tail references.
Accessed 2026-09-10
Movable Surfaces, Doors and Nacelles Aernnova · Publication date not stated
Design and manufacture of rudders, elevators and doors for commercial programs.
Accessed 2026-09-10
2023 EMTN Base Prospectus — Aerostructures Leonardo · Publication date not stated
787 fuselage and stabilizer, 767 wing movables and empennage, ATR structures; historical program disclosure.
Accessed 2026-09-10
Boeing 737 Mitsubishi Heavy Industries · Publication date not stated
NG inboard-flap manufacturing; page contains dated aircraft-level context.
Accessed 2026-09-10
Aeronautical Subsystems Saab · Publication date not stated
A320 ailerons, A330neo trailing-edge structure, A321 ACF doors and 787 cargo/crew-escape doors.
Accessed 2026-09-10