News for BMAA Members
BMAA - New Weight & Balance Procedures
that the new weighing process is in place, the next weighing of your aircraft
will be its last ‘routine’ weighing. It’s therefore really important to
weigh it carefully and get it right. See TIL 012 issue 5 on the website
for the exciting details.
respect to timings, in general the next weighing is due 5 years after the last
weighing (under the old procedure). However, for aircraft whose last
weighing expired on or after 1 August 2014 (and before the 31 December 2016),
the next weighing can be delayed until the end of 2016.
- Example 1: aircraft last weighed 30 April
2012; next weighing due 29 April 17.
- Example 2: aircraft last weighed 30 April
2011; next weighing due 31 December 2016.
- Example 3: aircraft last weighed 30 April
2010; next weighing due 31 December 2016.
- Example 4: aircraft last weighed 30 April
2009; weighing overdue!
that under the new weighing system there is no penalty for weighing your
what has changed?
Calendar based reweighs are no longer mandated – however the BMAA does
still recommend weighing at least every 10 years (5 years for wooden &
Clarification of empty weights - Basic Empty
Weight (aka Zero Fuel Weight) & Actual Empty Weight:
Basic Empty Weight (aka Zero Fuel
Weight) – All existing airframes are accepted as is, new airframes still need to demonstrate
compliance, but this can be done by calculation.
Actual Empty Weight –
The empty weight of the aircraft in its flying or operational state. This
weight can be greater than the basic empty weight. This weight includes
all additional non-essential components fitted, such as spats, GPS, radio, seat
covers, baggage hammock, etc. Critically for 3-axis types this is the
point at which balance is also checked.
Annual Review –
The Inspector is now tasked with checking that the aircraft weight and balance
report is up to date at each inspection (including placarding). It is
important that all weight changes are accounted for as and when they
occur. If the Inspector is dissatisfied with the state of the weight
report a reweigh may be the best cause
A new weight and balance spreadsheet has been produced. Macros have been
removed and the calculator has been tested on Apple and Android devices.
The report has a new inventory section, which must be used to record all items
fitted at the time of weighing.
documentation for the permit renewal and weighing process can be found in the
Aircraft Technical section of the BMAA website, or by clicking here. There is additional information about the
inspection and check flight process here.
the BMAA tech Office should you require any clarification.
Knowing the weight
and CG of an aircraft before each flight is hugely important. The change away
from a routine five yearly weighing does not change that fact or reduce its
importance. Know your weight, check your C of G.
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