Back to home page737 MAX - FBW Spoiler System

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Illustrated technical information covering Vol 2 Over 800 multi-choice systems questions Close up photos of internal and external components Illustrated history and description of all variants of 737 Databases and reports of all the major 737 accidents & incidents History and Development of the Boeing 737 - MAX General flightdeck views of each generation of 737's Technical presentations of 737 systems by Chris Brady Detailed tech specs of every series of 737 A collection of my favourite photographs that I have taken of or from the 737 Press reports of orders and deliveries Details about 737 production methods A compilation of links to other sites with useful 737 content Study notes and technical information A compilation of links to major 737 news stories with a downloadable archive A quick concise overview of the pages on this site

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The MAX has a new fly-by-wire spoiler system. This is officially to improve production flow, reduce weight and improve stopping distances.The spoiler mixer unit has been replaced by a Spoiler Control Electronics (SCE) unit and the ground spoiler control valve is replaced by a Ground Spoiler Control Module (GSCM).

Here are some of the new features that system brings.

737 MAX - FBW Spoiler System
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*** Updated 05 Aug 2023 ***

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SPOILERS light

This new amber caution light is located on the bottom right of the Flight Control Panel. It indicates a spoiler fault as sensed by the SCE unit, which means that one or more spoiler pairs are inoperative.

MAX Flight Control Panel

Elevator Jam Landing Assist

This will give limited changes to the vertical flight path from the spoilers to assist the approach and landing if the normal elevator system jams. The control panel is located on the Aft Overhead Panel, even if it is switched on it will only be active when the flaps are 1 or greater. When in use, the spoilers rise to a preset position; they then extend or retract as the elevator column is pushed or pulled to increase or decrease the rate of descent.

Elevator Jam Landing Assist

NB the MAINT light replaces the PSEU light from the NG series. See Warning systems for details.

Landing Attitude Modifier

The LAM does two things:

  1. At flap 15-30 if the thrust is near idle it will slightly raise the flight spoilers to increase drag to increase thrust above idle.
  2. At flap 30 or 40, the flight spoilers will raise slightly to reduce lift necessitating a higher AoA and hence nose attitude to give an "acceptable nose gear contact margin"

Emergency Descent Speedbrakes

EDS gives an increased flight spoiler deflection when the speedbrakes are used above FL300 and the Cabin Altitude Warning is active.
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