Piper Chieftain Known Icing?

[MNFlyboy]

Looking into a Chieftain and it's come to my attention that in the late 70's that some of the aircraft listed as "Full De-Ice" and later on it changes to "Known Icing". If the POH doesn't specifically have the nomenclature of Certified Flight into Known Icing, but it lists that it can fly into light and moderate icing conditions as the older ones state, how does that work as far as Reg's are considered? Will these fully de-iced airplanes pass the grade with the FAA for flying in icing conditions or just the newer ones with the Known Ice certification? Ultimately if the aircraft burns in with out the FIKI certification, just the fully de-ice literature, how's that going to play out?

Any Chieftain drivers out there with a pre-1979 models if you could chime in that would be great.

Thanks

 

[Fly_Unity]

I copied this from Circular 135-9, "FAR Part 135 Icing Limitations. (I dont know why it does not copy and paste in the right spelling) It gives the history and guidence on what you can and can not do.

Note this is for 135 operations. It is my understanding that part 91 your either FIKI approved or not. So there may be a case where you can do a trip 135 with passengers if you got "full deice", but you cant fly the dead leg back home because of forecasted icing. I know its stupid.

Here is another link that explains where one guy got violated even with icing protection on the aircraft when he crashed as a result of flying into a SIGMET of icing condtions.
http://www.avweb.com/news/airman/184265-1.html


Circular 135-9, "FAR Part 135 Icing Limitations
When ice certification requirements were included in Part 23, the operating
limitations were shown in the limitation section of the flight manual or manual
material. Placards were used to display these limitations.

b. Prior to the early 1960's, no criteria was available regarding ice
certification for snall aircraft. Between that time and 1973, ice protection
authorizations were based on FAA policy and regulations. Those aircraft were
limited to flight into light or moderate icing conditions.

c. In 1973, new Part 23 ice certification rules became effective which
contained a standard that the aircraft nust be capable of operations into continuous
maximum or intermittent rnaxinarm icing conditions, which was a stringent
requirement than the previous policy. However, many aircraft were being
manufactured after 1973 and equipped with deicing or anti-icing equipnt under type
certificates issued prior to 1973.

d. After 1973, some manufacturers continued to produce these aircraft with the
previously approved quipnent installed rather than recertificate to meet the new
icing certification standards. For those aircraft that did not meet the new icing
certification standards, placards were installed prohibiting flight in icing
conditions. 'Thus, of many aircraft of the same make and rrpdel with identical ice
protection equipment, and were placarded because they were manufactured after 1973
whereas those aircraft manufactured prior to 1973 were mt.

e. FAR 91.31(a) states that m person may operate a civil aircraft without
Compliance with the operating limitations. Therefore, an aircraft containing a
placard specified in the limitations of the aircraft type certificate, or as a
limitation in the current operating limitation prescribed for that aircraft by the
Administrator, must be operated in accordance with that limitation.


OPERATING IN ICING CONDITIONS UNDER PART 135. Comnuters and air taxi operators
are utilizing aircraft with various operating Mutations in weather anditions
where icing is a factor. Therefore, clarification of the pertinent operating
requirements is necessary. The following is pertinent to the type of operations
authorized:

a. Aircraft quipped with functioning equipment meeting Section 135.227(b) and
not placarded restricting operations in icing conditions may fly under IFR or VFR
in known or forecast light or moderate icing and continue flight in actual
icing conditions.

b. Aircraft equipped with functioning equipnent meeting Part 135.227(b) and a
placard prohibiting operation in icing conditions may depart on a flight when light
or moderate icing forecast or reported to exist for the intended route to be
flown. However, continued flight in actual icing conditions is not permitted since
such flight does not cffnply with the placard or the operating limitation in the
aircraft flight manual.

C. Airplanes that have the ice protection provisions that meet Section 34 of
Appendix A of Part 135, that are type certificated with the ice protection
provisions of Part 23, or those for transport category airplane type certification
may be flown into known or forecast icing.