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EASA sib useless ?

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Old 14th Aug 2011, 22:11
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Cool EASA sib useless ?

Hi,

Monitoring of Take-Off Slats/Flaps Settings during
Departure
EASA sib-Fatigue.pdf

The EASA sib introduction
Improper take-off configuration can have catastrophic
consequences. The Take-Off Configuration Warning System is
intended to give the flight crew warning of any potentially
dangerous configuration before take-off. From the number of
reported accidents and incidents where the system has failed
to function or flights crews failed to select the correct
configuration, it can be deduced that improved procedures
would enhance safety.

Recent accidents involving the McDonnell Douglas DC-9-80
(MD-80) and Boeing 737 families of aeroplanes have been
attributed to this situation.

The reasons why, on rare occasions, flight crews fail to select
the correct configuration are complex and due to many factors,
such as time pressures, stress, fatigue, mental saturation,
distractions, non user friendly checklists, etc.
The recommendation

Recommendations: EASA recommends the following:

1. Operations Procedures – Take-Off Flap/Slat Selection

From a human factors standpoint, the slats/flaps selection for
take-off should be made during times of lower workload and
least distraction.

It is therefore recommended that operators review and amend
their operations manual procedures, as applicable, so that
take-off slats/flaps selections are made before the aeroplane
taxis away from the ramp, provided that:
 the applicable FCOM (or equivalent document) permits this
procedure; and
 this does not conflict with prevailing conditions and
associated procedures, e.g. application of de-icing fluid,
taxiing in winter conditions, avoidance of foreign object
damage, encountered obstacles, etc..

Type approval holders should review their FCOM (or
equivalent document, as applicable) to determine whether
take-off slats/flaps selections can be made before the
aeroplane taxis away from the ramp, and make amendments,
if appropriate.

It should be remembered that introduction of changes to these
procedures will likely require approval by the competent
authority and may also introduce the need for additional flight
crew training.

2. Monitoring of Take-Off Slats/Flaps Checklist
Effectiveness

Operators are encouraged to check the effectiveness of Take-
off slats/flaps check list items by examining available in-service
recorded data, and by monitoring the instances that they are
not set at the expected time.
This recommendation is useless ... if the factors:
time pressures, stress, fatigue, mental saturation,
distractions, non user friendly checklists, etc are not eliminated or reduced at max
What are the EASA recommendations about those factors ?
EASA can release many SIB they want .. if the root factors are not eliminated .. those SIB are useless ...
A comb for bald IMHO

Last edited by jcjeant; 14th Aug 2011 at 22:37.
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Old 15th Aug 2011, 03:13
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I wouldn't say so. EASA are recommending that operators introiduce an SOP where the critcal configuration change is done in a low workload environment. In otherwords, when the aircraft is stationary and the crew can concentrate.

Many aircraft already do this and I have had it included in my last three type's SOPs. Some Boeings have to have flaps selected to test the flying controls, as the outboard ailerons only operate with the flaps out and Airbus SOPs have the flaps selected as part of the after start scan.

Makes sense to me.
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Old 15th Aug 2011, 03:31
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Cool

Hi,

when the aircraft is stationary and the crew can concentrate.
Dunno if as stationary aircraft is a answer to all those problems :
time pressures, stress, fatigue, mental saturation,
distractions, non user friendly checklists
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Old 15th Aug 2011, 04:19
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Originally Posted by EASA
It is therefore recommended that operators review and amend their operations manual procedures, as applicable, so that take-off slats/flaps selections are made before the aeroplane taxis away from the ramp
Good idea. On my previous type, we selected flap during taxi out. The takeoff warning saved us a few times. On my current type, the FO doesn't select the flaps until the captain has armed the spoilers and the captain doesn't taxi until the flaps are set. Works much better; much lower error rate.
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