For Those truly interested read my post 11 - 15 - 17 on this thread , and read my posting headed http://recreationalflying.com/threads/unbelieveable.58765/
Below is a communication I had with CASA , names are taken off but anyone truly interested PM me for info. My Aircraft is 100% legal and none of this applies to me but I do feel there is a problem. I have sent this letter to a person that is actively involved in the sale of aircraft that have In flight Adjustable props as an option.
I believe if people feel strong enough they should discuss this with CASA and maybe there could be a change.
Full Name
XXXXXXXX
Email
XXXXXXXX
Comments
Dear Sir.
I am starting to wonder if Casa is interested in safety or just causing problems as now the sports aviation LSA rules are being changed in relation to constant speed and in-fight adjustable propellors. Seehttp://www.casa.gov.au/wcmswr/_assets/main/lib100159/d2p7_lsa.pdf
I am disappointed with the process as if things are approved then why pull the plug and change the rules unless safety is a concern. There was no standard for props then they apply one and already approved aircraft are audited.
http://www.raa.asn.au/2013/02/lsas-with-in-fligh-adjustable-prop/
I feel Casa should focus on safety, why was the standand not applied before as it was 7 years ago, why now ?
UNCLASSIFIED
Dear XXXXXXXXX
On behalf of the Director of Aviation Safety, thank you for your feedback email.
The issues you have raised are complex and below is some lengthy information provided by our Self Administering Sport Aviation Organisations Section. I hope it assists you.
The power point presentation you link to in your email is one that Mick Poole, Technical Officer SASAO, presented at the manufacturers seminar in Brisbane early last year after discovering the concerns with LSA and inflight adjustable propellers. The LSA rules have not been changed in respect to Constant speed and inflight adjustable propellers (IFAP), they are currently under increased scrutiny by SASAO.
When LSA was introduced to Australia in 2006 the AC that was produced (AC 21.42(1)) did not list an ASTM standard for propellers because one did not exist at that time. In 2007 an ASTM standard for fixed pitch and ground adjustable propellers was produced, and as our AC has not been revised it still does not include this standard. The reason that the ASTM standard for propellers was (and is currently) for fixed pitch and ground adjustable propellers only is that the standard was developed mainly for the USA market and FAA rules which only allow for a fixed pitch or ground adjustable propeller to be used on an LSA. There is no ASTM standarddeveloped for inflight adjustable or constant speed propellers, there are however other propeller standards available and hence the reference to the CASR and FAR standards in the power point presentation.
Unfortunately there is a common perception in industry that because CASA agreed that inflight adjustable propellers or constant speed propellers could be used, it didn’t matter that they did not meet a known standard. This was not CASA’s intention at all, but unfortunately the AC does not accurately reflect this.
Regardless of this, manufacturers are responsible for declaring under the statement of compliance that the aircraft propeller meets a known an accepted standard, however, many of these manufactures have sold aircraft to people without the aircraft meeting known and acceptable standards. Maintaining these standards was the greatest requirement for any manufacturer, unfortunately those who have chosen not to be duly diligent now have aircraft with propellers that do not meet any known or accepted standard.
CASA form 681, which is required to be completed by the manufacturer (copy attached), can be misleading in this respect. In the section Applicable LSA Standards of the form, it indicates the following in respect to propellers: Propeller (if applicable): the problem here is that manufacturers have not been listing a standard for the propeller because they believe that it isNot applicable. In fact for a LSA powered fixed wing aircraft the Propeller Standard IS applicable.
To summarise, the LSA rules have not been changed, they have just been misinterpreted.
As such, we now have LSA aircraft operating in Australia being used in flight training facilities, and conducting flights over populous areas, with constant speed and inflight adjustable propellers that have not been certified by the manufacturer as meeting a known standard.
Essentially they are effectively Experimental Propellers and as such need to be treated as such and have applicable operational conditions applied, until such time as they meet a known standard. Although some of these propellers have been operating for some time without any known concerns or issues, SASAO is aware of at least one type that has caused an accident after the mechanism failed and the propeller went to full coarse. The aircraft was unable to maintain level flight and crashed into trees on the edge of Wedderburn airstrip.
CASA is focusing on safety in respect to IFAPs since the discovery of the issue and the standard was applicablewhen LSA was introduced in 2006.
Regards
XXXXXXXXX
Civil Aviation Safety Authority
_________________________________________________________________________________________________-