Safety First The Airbus Safety Magazine Edition February 2010(2)

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during refuelling operations . pub-lished in issue #8 of Safety First, the second paragraph of chapter 3/ Guidance Material should read:
“Under normal circumstances the auto-refuel will close the refuel valve at the requested fuel-on-board preselected value. High-level sensors within the fuel tank will also automatically close the valve if high-level is reached.
On later programmes (A330/A340/ A380) if the high level sensors fail, then an additional overfill sensor in the surge tanks, if wet, will automatically close the valve.
However the basic step requested in the AMM for all aircraft refuel procedures is the high level / over-fill sensor test via the dedicated pushbutton on the refuel panel.”

The Airbus Safety Magazine Issue 9 | FEBRUARY 2010 3
Stéphane BOISSENIN

Elisabeth SALAVY
Engineer, Handling Qualities
Engineer, Flight Control Systems
Engineering

Engineering

 

A320 Family/ Evolution of ground spoiler logic
2. Current ground spoiler extension conditions
2.1. Full extension
Depending on whether the ground spoilers have been armed or not, the following conditions must be met for their full automatic extension (as outlined in FCOM 1.27.10 p12):
qGround spoilers armed (fig. 1)
..Both main landing gears seen
on ground.
..Both thrust levers at or below
Idle notch (fig. 2).
Figure 2
1. Introduction
Ground spoilers reduce the lift produced by the wings and hence transfer the weight of the aircraft to the landing gear, allowing a more effective wheel braking action.
Their non or untimely extension has been a factor in the following types of A320 Family events:
qThe absence of spoiler exten-sion contributed to increase the stopping distance during landing.
qThe untimely spoiler extension contributed to a number of hard landings.
In both cases, the cause could be traced back to non arming of the ground spoilers and/or inap-propriate thrust levers positions during the flare.
To reduce the frequency of these events, Airbus has modified the spoiler extension logic.
The new logic is now tolerant to inappropriate speed brake and/or thrust levers positions.

This modification applies to the complete as well as to the partial ground spoiler extension.
It was achieved by creating a new standard of Spoiler Eleva-tor Computer (SEC), which is in charge of spoiler control, the SEC standard 120.
This article will describe:
qThe current ground spoiler extension conditions.
　
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