AD/Cessna 208/17 Flight into Icing Conditions (Cth)
AIRWORTHINESS DIRECTIVE
For the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.001(1) of CASR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.
Cessna 208 Series Aeroplanes
| AD/CESSNA 208/17 | Flight into Icing Conditions | 7/2005 |
Applicability: | Cessna Aircraft Models 208 and 208B. |
Requirement: | Incorporate the following revisions into the Airplane Flight Manual (AFM): Cessna Model 208 airplanes and Model 208B airplanes All serial numbers. 1. Incorporate the following Airplane Flight Manual revision document: Section 2: Limitations and Section 4: Normal Procedures: Temporary Revision 208PHTR04 dated 02 March 2005, to the Pilots Operating Handbook (POH) and FAA-approved AFM, except replace the Limitations (Section 2) of the Temporary Revision 208PHTR04 to the POH / FAA-approved AFM with the Appendix to this AD. (This may be done by inserting a copy of this AD into the POH / AFM.). Cessna Model 208 airplanes with a Pratt & Whitney of Canada (PWC) 1. Incorporate the following AFM revision document: Section 9: Optional Systems Description and Operating Procedures: Revision 5 of the 208 (675 SHP) POH / FAA-approved AFM Supplement S1 "Known Icing Equipment" Cessna document 2. Revise the Performance Section (Section 5) of the AFM Supplement by inserting the following text (this may be done by inserting a copy of this AD in the AFM Supplement). “WARNING: The stall warning system has not been tested in all icing conditions and should not be relied upon in icing conditions.” |
| Cessna Model 208 airplanes with a PWC PT6A-114 turboprop engine installed (600 SHP) or FAA-approved engine of equivalent horsepower installed, except airplanes modified by STC SA00892WI. 1. Incorporate the following AFM revision document: Section 9: Optional Systems Description and Operating Procedures: Revision 5 of the Cessna Model 208 (600 SHP) POH/FAA-approved AFM Supplement S1 "Known Icing Equipment", Cessna document D1307-S1-05, dated 02 March 2005, except incorporate the Appendix to this AD into paragraphs "PREFLIGHT"and "VISUAL/TACTILE CHECK" of the Limitations Section of the POH / FAA-approved AFM Supplement S1 "Known Icing Equipment". 2. Revise the Performance Section (Section 5) of the AFM Supplement by inserting the following text (this may be done by inserting a copy of this AD in the AFM Supplement). “WARNING: The stall warning system has not been tested in all icing conditions and should not be relied upon in icing conditions.” Cessna Model 208B airplanes with a PWC PT6A–114A turboprop engine installed (675 SHP) or FAA-approved engine of equivalent horsepower installed, except airplanes modified by STC SA00892WI. 1. Incorporate the following Airplane Flight Manual revision document: Section 9: Optional Systems Description and Operating Procedures: Revision 6 of the 208B (675 SHP) POH / FAA-approved AFM Supplement S1 "Known Icing Equipment", Cessna document 2. Revise the Performance Section (Section 5) of the AFM Supplement by inserting the following text (this may be done by inserting a copy of this AD in the AFM Supplement). “WARNING: The stall warning system has not been tested in all icing conditions and should not be relied upon in icing conditions.” |
| Cessna Model 208B airplanes with a PWC PT6A–114 turboprop engine installed (600 SHP) or FAA-approved engine of equivalent horsepower installed, except airplanes modified by STC SA00892WI. 1. Incorporate the following Airplane Flight Manual revision document: Section 9: Optional Systems Description and Operating Procedures: Revision 5 of the 208B (600 SHP) POH / FAA-approved AFM Supplement S1 "Known Icing Equipment", Cessna document 2. Revise the Performance Section (Section 5) of the AFM Supplement by inserting the following text (this may be done by inserting a copy of this AD in the AFM Supplement). “WARNING: The stall warning system has not been tested in all icing conditions and should not be relied upon in icing conditions.” Note 1: The Owner / Operator holding at least a Private Pilot Licence may do the flight manual changes requirement of this AD. Make an entry in the aircraft records showing compliance. Note 2: FAA AD 2005-07-01 Amendment 39-14025 dated 11 April 2005refers. | |
Compliance: | Unless accomplished earlier, within 7 days, after the effective date of this Airworthiness Directive. |
| This Airworthiness Directive becomes effective on 7 July 2005. | |
Background: | There have been several reports of problems with Cessna 208 / 208B airplanes during operations in the icing condition. The actions required by this AD assure that the pilot has enough information to prevent loss of control of the airplane while in-flight during icing conditions. |
James Coyne
Delegate of the Civil Aviation Safety Authority
23 May 2005
AD/CESSNA 208/17 | Flight into Icing Conditions | Appendix A |
Preflight
Takeoff is prohibited with any frost, ice, snow, or slush adhering to the wings, horizontal stabilizer, control surfaces, propeller blades, and engine inlets.
Warning
Even small amounts of frost, ice, and snow, or slush on the wing may adversely change lift and drag. Failure to remove these contaminants will degrade airplane performance and may prevent a safe takeoff and climbout.
Visual / Tactile Check
In addition to a visual check, a tactile check of the wing leading edge, wing upper surface (up to two feet behind the deicing boot at on-span location as a minimum), horizontal tail leading edge, and propeller blades is required if the outside air temperature (OAT) is below 5o C (41oF) and visible moisture (rain, drizzle, sleet, snow, fog etc.) is present or the airplane was exposed to visible moisture (rain, drizzle, sleet, snow, fog etc.) since the previous landing; or the airplane experienced in-flight ice accretion since the previous takeoff; or the difference between the dew point temperature and the OAT is 3oC (5o F) or less; or water is present on the wing. Reference the preflight procedures in Section 4 of the basic Pilot's Operating Handbook.
0
0
0