[Federal Register Volume 72, Number 95 (Thursday, May 17, 2007)]
[Rules and Regulations]
[Pages 27725-27730]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: E7-9398]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2006-26498; Directorate Identifier 2006-CE-83-AD; 
Amendment 39-15056; AD 2007-10-15]
RIN 2120-AA64


Airworthiness Directives; Cessna Aircraft Company Models 208 and 
208B Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule.

-----------------------------------------------------------------------

SUMMARY: The FAA is adopting a new airworthiness directive (AD) to 
supersede AD 2006-06-06, which applies to certain Cessna Aircraft 
Company (Cessna) Models 208 and 208B airplanes. AD 2006-06-06 currently 
requires you to incorporate information into the applicable section of 
the Airplane Flight Manual (AFM) and Pilot's Operating Handbook (POH) 
and requires you to install placards. Since we issued AD 2006-06-06, 
Cessna issued new S1 Known Icing Equipment AFM supplements and 
developed a low airspeed awareness system. Consequently, this AD 
requires you to incorporate the applicable AFM supplement revision and 
temporarily retain the requirements of AD 2006-06-06 until the above 
revisions are incorporated. One of the AFM requirements is the 
installation of a functional low airspeed awareness system to operate 
the airplane in known icing conditions. We are issuing this AD to 
assure that the pilot has enough information and the necessary 
equipment to prevent loss of control of the airplane while in-flight 
during icing conditions.

[[Page 27726]]


DATES: This AD becomes effective on June 21, 2007.

ADDRESSES: To get the service information identified in this AD, 
contact the Cessna Aircraft Company, Product Support, P.O. Box 7706, 
Wichita, Kansas 67277.
    To view the AD docket, go to the Docket Management Facility; U.S. 
Department of Transportation, 400 Seventh Street, SW., Nassif Building, 
Room PL-401, Washington, DC 20590-001 or on the Internet at http://dms.dot.gov. The docket number FAA-2006-26498; Directorate Identifier 
2006-CE-83-AD.

FOR FURTHER INFORMATION CONTACT: Robert P. Busto, Aerospace Engineer, 
Wichita Aircraft Certification Office, FAA, 1801 Airport Road, Wichita, 
Kansas 67209; telephone: (316) 946-4157; fax: (316) 946-4107.

SUPPLEMENTARY INFORMATION:

Discussion

    On January 25, 2007, we issued a proposal to amend part 39 of the 
Federal Aviation Regulations (14 CFR part 39) to include an AD that 
would apply to Cessna Models 208 and 208B airplanes. This proposal was 
published in the Federal Register as a notice of proposed rulemaking 
(NPRM) on February 1, 2007 (FR 72 4663). The NPRM proposed to supersede 
AD 2006-06-06, which currently requires you to incorporate information 
into the applicable section of the Airplane Flight Manual (AFM) and 
Pilot's Operating Handbook (POH) and requires you to install placards. 
The NPRM would require you to incorporate new S1 Known Icing Equipment 
AFM supplements and to install a low airspeed awareness system.

Comments

    We provided the public the opportunity to participate in developing 
this AD. The following presents the comments received on the proposal 
and FAA's response to each comment. As policy, we do not address 
anonymous comments.

Comment Issue No. 1: Provide More Time for Installation of the Low 
Airspeed Awareness System

    Corporate Air, the Regional Air Cargo Carriers Association (RACCA), 
and Federal Express request an extension to the compliance time for 
installing the low airspeed awareness system. The NPRM proposes a 
compliance time of 30 days, and the commenters want an extension until 
September 2007 in order to prevent unnecessary grounding of their 
airplanes. The commenters state that this should not present a safety 
problem since the icing season does not start until the end of 
September or early October.
    The FAA concurs that the compliance time for the low airspeed 
awareness system can be extended and will increase it from 30 days to 
90 days after the effective date of the AD. Cessna has issued new S1 
Known Icing Equipment AFM supplements, dated February 20, 2007. These 
supplements incorporate all the actions from the NPRM, including the 
requirement for the installation of a functional low airspeed awareness 
system when flying into known icing conditions.
    We are changing the final rule to require the incorporation of the 
applicable S1 Known Icing Equipment AFM supplement, dated February 20, 
2007, and to extend the compliance time from 30 days to 90 days after 
the effective date of the AD.

Comment Issue No. 2: Do Not Retain the Actions From AD 2006-06-06

    RACCA believes that there is no need for the FAA to restate the 
actions of AD 2006-06-06 in the AD. The commenter states that as soon 
as the new AD becomes effective, the actions of AD 2006-06-06 are 
superseded and are no longer necessary.
    We concur that, as of the effective date of the new AD, the actions 
of AD 2006-06-06 are superseded. However, we are allowing 90 days after 
the effective date of this AD before the new actions must be 
incorporated. It is essential to address the unsafe condition and 
assure that the actions of AD 2006-06-06 remain in effect until the 
actions required by the new AD are incorporated.
    We have not made changes to the final rule based on this comment.

Comment Issue No. 3: Clarify Whether Alternative Methods of Compliance 
(AMOC) Approved per AD 2006-06-06 Are Retained for This AD

    Since the FAA is retaining the actions of AD 2006-06-06 until the 
new actions are done, RACCA questions whether it is the FAA's intent to 
allow the AMOCs approved for AD 2006-06-06.
    It is the FAA's intent to retain the AMOCs approved for AD 2006-06-
06 during the 90-day compliance period until the new actions are 
required.
    We are changing the final rule to state that AMOCs approved for AD 
2006-06-06 are approved for this AD until the actions required by 
paragraph (e) of this AD are done.

Comment Issue No. 4: Concern About the Reliability and Accuracy of the 
Low Airspeed Awareness Alert System

    Corporate Air expresses concern about the reliability and accuracy 
of the low airspeed awareness alert system. The commenter did not 
request a specific change other than the change in compliance time 
referenced previously. We infer that the commenter either wants the 
requirement taken out of the AD or the AD delayed until further 
research can be done.
    The FAA and Cessna conducted flight tests of the low airspeed 
awareness system during certification where the system passed all 
certification tests and was found acceptable. The system was designed 
to meet reliability certification requirements. We have determined that 
a functional low airspeed awareness system is necessary for the Cessna 
Models 208 and 208B to safely operate in known icing conditions.
    We have not made changes to the final rule based on this comment.

Comment Issue No. 5: Require Equipment Other Than the Low Airspeed 
Awareness System

    Stephen McClure believes that there will not be any benefit in 
safety from the installation of the low airspeed awareness system, 
because the airplane airspeed indicators already fill the need. He 
feels that pilots need to be trained to avoid and/or exit icing 
conditions once encountered. As an alternative, the commenter believes 
a better wing ice detection light system, automatic boot cycling 
system, and Goodrich ice detection system would provide a better safety 
benefit than the low airspeed awareness system.
    We do not agree that the low airspeed awareness system is not 
necessary and have determined that it is necessary for flight in known 
icing conditions. The accident/incident history of the Model 208 
indicates that pilots have not been diligent in the management of the 
aircraft when operating in icing conditions, as aircraft performance 
can decay very quickly. Additionally, the accident that occurred in 
Moscow in 2006 and recent flight tests have shown that the aural stall 
warning system does not provide sufficient time before a stall in all 
icing conditions. The low airspeed awareness system addresses each of 
these concerns by providing an alert with sufficient time to allow 
pilots to take the proper corrective action. The commenter is correct 
in stating that training pilots to avoid and/or exit icing conditions 
is a prudent course of action. Cessna has issued new S1 Known Icing 
Equipment AFM supplements, dated

[[Page 27727]]

February 20, 2007. These supplements incorporate all the actions from 
the NPRM, including the requirement for the installation of a 
functional low airspeed awareness system when flying into known icing 
conditions.
    We agree with the commenter that the additional systems referenced 
would enhance safety. However, the accident/incident history on the 
Models 208 and 208B does not justify requiring the installation of such 
equipment through AD action. The pilot's failure to detect icing 
conditions has not been the problem on the affected airplanes; the 
problem has been having the information, training, and/or equipment 
necessary to operate safely once icing conditions are encountered. 
Additionally, the FAA examined the effectiveness of auto deice boot 
cycling during icing tunnel tests in 2005 and discovered that, at 
typical speeds associated with the Models 208 and 208B airplanes, the 
deice boot clearing effectiveness was not significantly improved over 
manually cycling at a certain accretion thickness. Therefore, the 
benefit of an automatic deice boot cycling system would be to relieve 
pilot workload. Service history on the Models 208 and 208B airplanes 
and many other aircraft with manual boot cycling systems does not 
justify the need to mandate an automatic system.
    We are changing the final rule to require the incorporation of the 
applicable S1 Known Icing Equipment AFM supplement, dated February 20, 
2007, and the extension of the compliance time from 30 days to 90 days 
after the effective date of the AD.

Conclusion

    We have carefully reviewed the available data and determined that 
air safety and the public interest require adopting the AD as proposed 
except for the changes previously discussed and minor editorial 
corrections. We have determined that these changes and minor 
corrections:
     Are consistent with the intent that was proposed in the 
NPRM for correcting the unsafe condition; and
     Do not add any additional burden upon the public than is 
already required.

Costs of Compliance

    We estimate that this AD affects 765 airplanes in the U.S. 
registry.
    The AD requires inserting the applicable new S1 Known Icing 
Equipment AFM supplement, dated February 20, 2007, into the AFM/POH, 
which includes the installation of a low airspeed awareness alert 
system. We estimate the following costs to do the actions of this AD:

----------------------------------------------------------------------------------------------------------------
                                                                                 Total cost per   Total cost on
                          Labor cost                              Parts cost        airplane      U.S. operators
----------------------------------------------------------------------------------------------------------------
22 work-hours x $80 per hour = $1,760........................          $6,440           $8,200       $6,273,000
----------------------------------------------------------------------------------------------------------------

Authority for This Rulemaking

    Title 49 of the United States Code specifies the FAA's authority to 
issue rules on aviation safety. Subtitle I, Section 106 describes the 
authority of the FAA Administrator. Subtitle VII, Aviation Programs, 
describes in more detail the scope of the agency's authority.
    We are issuing this rulemaking under the authority described in 
Subtitle VII, Part A, Subpart III, Section 44701, ``General 
requirements.'' Under that section, Congress charges the FAA with 
promoting safe flight of civil aircraft in air commerce by prescribing 
regulations for practices, methods, and procedures the Administrator 
finds necessary for safety in air commerce. This regulation is within 
the scope of that authority because it addresses an unsafe condition 
that is likely to exist or develop on products identified in this AD.

Regulatory Findings

    We have determined that this AD will not have federalism 
implications under Executive Order 13132. This AD will not have a 
substantial direct effect on the States, on the relationship between 
the national government and the States, or on the distribution of power 
and responsibilities among the various levels of government.
    For the reasons discussed above, I certify that this AD:
    1. Is not a ``significant regulatory action'' under Executive Order 
12866;
    2. Is not a ``significant rule'' under the DOT Regulatory Policies 
and Procedures (44 FR 11034, February 26, 1979); and
    3. Will not have a significant economic impact, positive or 
negative, on a substantial number of small entities under the criteria 
of the Regulatory Flexibility Act.
    We prepared a summary of the costs to comply with this AD (and 
other information as included in the Regulatory Evaluation) and placed 
it in the AD Docket. You may get a copy of this summary by sending a 
request to us at the address listed under ADDRESSES. Include ``Docket 
No. FAA-2006-26498; Directorate Identifier 2006-CE-83-AD'' in your 
request.

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, Safety.

Adoption of the Amendment

0
Accordingly, under the authority delegated to me by the Administrator, 
the Federal Aviation Administration amends part 39 of the Federal 
Aviation Regulations (14 CFR part 39) as follows:

PART 39--AIRWORTHINESS DIRECTIVES

0
1. The authority citation for part 39 continues to read as follows:

    Authority: 49 U.S.C. 106(g), 40113, 44701.


Sec.  39.13  [Amended]

0
2. The FAA amends Sec.  39.13 by removing Airworthiness Directive (AD) 
2006-06-06, Amendment 39-14514, (71 FR 13533, March 16, 2006), and 
adding the following new AD:

2007-10-15 Cessna Aircraft Company: Amendment 39-15056; Docket No. 
FAA-2006-26498; Directorate Identifier 2006-CE-83-AD.

Effective Date

    (a) This AD becomes effective on June 21, 2007.

Affected ADs

    (b) This AD supersedes AD 2006-06-06, Amendment 39-14514.

Applicability

    (c) This AD applies to Models 208 and 208B, all serial numbers, 
that are certificated in any category.

Unsafe Condition

    (d) This AD results from our determination that the revisions 
dated February 20, 2007, to the S1 Known Icing Equipment AFM 
supplement are necessary and should be incorporated into the 
Airplane Flight Manual (AFM)/Pilot's Operating Handbook (POH); and 
that a low airspeed awareness system should be required when 
operating in known icing conditions. We are issuing this AD to 
assure that the pilot has enough information and the necessary 
equipment to prevent loss of control of the airplane while in-flight 
during icing conditions.

New Actions Required by this AD

    (e) Unless already done, within the next 90 days after the 
effective date of this AD,

[[Page 27728]]

incorporate the applicable new S1 Known Icing Equipment AFM 
supplement, dated February 20, 2007, into the AFM/POH:

 
------------------------------------------------------------------------
                Document                             Affects
------------------------------------------------------------------------
(1) Model 208 (675 SHP) FAA-approved     Cessna Model 208 airplanes with
 Flight Manual Supplement S1 ``Known      a Pratt & Whitney of Canada
 Icing Equipment,'' Cessna document       Ltd., PT6A-114A turboprop
 D1352-S1-10, dated February 20, 2007,    engine installed (675 SHP) or
 or later FAA-approved revision that      FAA-approved engine of
 incorporates the same information.       equivalent or higher
                                          horsepower installed, equipped
                                          with airframe deicing
                                          pneumatic boots, that are not
                                          currently prohibited from
                                          flight in known or forecast
                                          icing
(2) Model 208 (600 SHP) FAA-approved     Cessna Model 208 airplanes with
 Flight Manual Supplement S1 ``Known      a Pratt & Whitney of Canada
 Icing Equipment,'' Cessna document       Ltd., PT6A-114 turboprop
 D1307-S1-09, dated February 20, 2007,    engine installed (600 SHP) or
 or later FAA-approved revision that      FAA-approved engine of
 incorporates the same information.       equivalent horsepower
                                          installed, equipped with
                                          airframe deicing pneumatic
                                          boots, that are not currently
                                          prohibited from flight in
                                          known or forecast icing.
(3) Model 208B (675 SHP) FAA-approved    Cessna Model 208B airplanes
 Flight Manual Supplement S1 ``Known      with a Pratt & Whitney of
 Icing Equipment,'' Cessna document       Canada Ltd., PT6A-114A
 D1329-S1-10, dated February 20, 2007,    turboprop engine installed
 or later FAA-approved revision that      (675 SHP) or FAA-approved
 incorporates the same information.       engine of equivalent or higher
                                          horsepower installed, equipped
                                          with airframe deicing
                                          pneumatic boots, that are not
                                          currently prohibited from
                                          flight in known or forecast
                                          icing.
(4) Model 208B (600 SHP) FAA-approved    Cessna Model 208B airplanes
 Flight Manual Supplement S1 ``Known      with a Pratt & Whitney of
 Icing Equipment,'' Cessna document       Canada Ltd., PT6A-114
 D1309-S1-10, dated February 20, 2007,    turboprop engine installed
 or later FAA-approved revision that      (600 SHP) or FAA-approved
 incorporates the same information.       engine of equivalent
                                          horsepower installed, equipped
                                          with airframe deicing
                                          pneumatic boots, that are not
                                          currently prohibited from
                                          flight in known or forecast
                                          icing.
------------------------------------------------------------------------


    Note: The above supplements require the installation of a 
functional low airspeed awareness system. Cessna Service Bulletin 
CAB06-11 and Service Kit SK 208-171, both dated October 9, 2006, 
provide instructions for such an installation.

    (f) The owner/operator holding at least a private pilot 
certificate as authorized by section 43.7 of the Federal Aviation 
Regulations (14 CFR 43.7) may insert the information into the POH 
specified in all paragraphs (e)(1) through (e)(4) of this AD. Make 
an entry into the aircraft records showing compliance with this 
portion of the AD in accordance with section 43.9 of the Federal 
Aviation Regulations (14 CFR 43.9).

Actions Retained From AD 2006-06-06

    (g) The actions in paragraphs (h) and (i) of this AD below are 
retained in this AD from AD 2006-06-06. The new actions required by 
this AD in paragraph (e) above terminate the requirement for the 
actions in paragraphs (h) and (i) of this AD.
    (h) No later than March 27, 2006 (3 days after March 24, 2006, 
which is the effective date of AD 2006-06-06), incorporate the 
following revisions into the Airplane Flight Manual (AFM), unless 
already done:

------------------------------------------------------------------------
                                          Incorporate the following AFM
           Affected airplanes                   revision document
------------------------------------------------------------------------
(1) Cessna Model 208 airplanes and       Section 2: Limitations and
 Model 208B airplanes, all serial         Section 4: Normal Procedures:
 numbers.                                 Temporary Revision 208PHTR05,
                                          dated June 27, 2005, to the
                                          POH and FAA-approved AFM.
(2) Cessna Model 208 airplanes with a    Section 9: Optional Systems
 Pratt & Whitney of Canada Ltd., PT6A-    Description and Operating
 114A turboprop engine installed (675     Procedures: Revision 6 of the
 SHP) or FAA-approved engine of           208 (675 SHP) POH/FAA-approved
 equivalent horsepower installed,         AFM Supplement S1 ``Known
 equipped with airframe deicing           Icing Equipment,'' Cessna
 pneumatic boots, that are not            document D1352-S1-06, dated
 currently prohibited from flight in      June 27, 2005.
 known or forecast icing.
(3) Cessna Model 208 airplanes with a    Section 9: Optional Systems
 Pratt & Whitney of Canada Ltd., PT6A-    Description and Operating
 114 turboprop engine installed (600      Procedures: Revision 6 of the
 SHP) or FAA-approved engine of           Cessna Model 208 (600 SHP) POH/
 equivalent horsepower installed,         FAA-approved AFM Supplement S1
 equipped with airframe deicing           ``Known Icing Equipment,''
 pneumatic boots, that are not            Cessna document D1307-S1-06,
 currently prohibited from flight in      dated June 27, 2005.
 known or forecast icing.
(4) Cessna Model 208B airplanes with a   Section 9: Optional Systems
 Pratt & Whitney of Canada Ltd., PT6A-    Description and Operating
 114A turboprop engine installed (675     Procedures: Revision 7 of the
 SHP) or FAA-approved engine of           208B (675 SHP) POH/FAA-
 equivalent horsepower installed,         approved AFM Supplement S1
 equipped with airframe deicing           ``Known Icing Equipment,''
 pneumatic boots, that are not            Cessna document D1329-S1-07,
 currently prohibited from flight in      dated June 27, 2005.
 known or forecast icing.
(5) Cessna Model 208B airplanes with a   Section 9: Optional Systems
 Pratt & Whitney of Canada Ltd., PT6A-    Description and Operating
 114 turboprop engine installed (600      Procedures: Revision 6 of the
 SHP) or FAA-approved engine of           208B (600 SHP) POH/FAA-
 equivalent horsepower installed,         approved AFM Supplement S1
 equipped with airframe deicing           ``Known Icing Equipment,''
 pneumatic boots, that are not            Cessna document D1309-S1-06,
 currently prohibited from flight in      dated June 27, 2005.
 known or forecast icing.
------------------------------------------------------------------------

    (i) No later than March 27, 2006 (3 days after March 24, 2006, 
which is the effective date of AD 2006-06-06), you must do the 
following actions, unless already done. These changes are to the POH 
and FAA-approved AFM and to the POH/FAA-approved AFM Supplement S1 
``Known Icing Equipment'' mandated in paragraph (h) of this AD. The 
owner/operator holding at least a private pilot certificate as 
authorized by section 43.7 of the Federal Aviation Regulations (14 
CFR 43.7) may do the placard POH/AFM requirements as specified in 
the paragraphs below. Make an entry into the aircraft records 
showing compliance with portion of the AD in accordance with section 
43.9 of the Federal Aviation Regulations (14 CFR 43.9):
    (1) For Cessna Model 208 airplanes and Model 208B airplanes, all 
serial numbers, equipped with airframe deicing pneumatic boots, that 
are not currently prohibited from flight in known or forecast icing: 
You are prohibited from continued flight after

[[Page 27729]]

encountering moderate or greater icing conditions. The airplane can 
dispatch into forecast areas of icing but must exit moderate or 
greater icing conditions if encountered.
    (2) For Cessna Model 208 airplanes and Model 208B airplanes, all 
serial numbers, equipped with airframe deicing pneumatic boots, that 
are not currently prohibited from flight in known or forecast icing:
    (i) Insert the text in Appendix 1 of this AD preceding the KINDS 
OF OPERATION LIMITS paragraph in the LIMITATIONS section of the 
Cessna Models 208 or 208B POH and FAA-approved AFM.
    (ii) Insert the text in Appendix 2 of this AD in the LIMITATIONS 
section of the Cessna Models 208 or 208B POH and FAA-approved AFM 
KNOWN ICING EQUIPMENT SUPPLEMENT S1 at the beginning of the 
paragraph ``REQUIRED EQUIPMENT.''
    (3) For Cessna Models and Models 208B airplanes, all serial 
numbers, equipped with airframe deicing pneumatic boots that are not 
currently prohibited from flight in known or forecast icing: Install 
three placards with black letters on a white background. The 
placards must be located on the instrument panel under the radio 
stack, immediately above the pilot's flight instruments, or below 
the vertical speed indicator. Lettering on the placard must be a 
minimum height of 1/8-inch.
    (i) Placard 1 must include the text of Appendix 3 of this AD.
    (ii) Placard 2 must include the following text: ``120 KIAS 
Minimum in Icing Flaps Up except 110 KIA if Climbing to Exit 
Icing.''
    (iii) Placard 3 must include the following text: ``Disconnect 
autopilot at first indication of ice accretion.''
    (4) For Cessna Models 208 and 208B airplanes, all serial 
numbers, equipped with airframe deicing pneumatic boots that are not 
currently prohibited from flight into known or forecast icing:
    (i) Insert the text in Appendix 4 of this AD under the 
``AIRSPEED LIMITATIONS'' paragraph in the LIMITATIONS section of the 
Cessna Models 208 and 208B POH and FAA-approved AFM.
    (ii) Replace the text in the KNOWN ICING EQUIPMENT SUPPLEMENT S1 
under the ``MINIMUM SPEED IN ICING CONDITIONS'' paragraph with the 
text in Appendix 4 of this AD.
    (iii) Insert the following text in the LIMITATIONS section of 
the POH/AFM under the ``OTHER LIMITATIONS'' paragraph and in the 
LIMITATIONS section of the KNOWN ICING EQUIPMENT SUPPLEMENT S1 under 
the ``AUTOPILOT OPERATION IN ICING CONDITIONS'' paragraph: 
``Disconnect autopilot at first indication of ice accretion.''
    (5) For Cessna Model 208 airplanes and Model 208B airplanes, all 
serial numbers, equipped with airframe deicing pneumatic boots, that 
are not currently prohibited from flight in known or forecast icing:
    (i) Replace the text in the PERFORMANCE section of the Cessna 
Models 208 or 208B POH and FAA-approved AFM KNOWN ICING EQUIPMENT 
SUPPLEMENT S1 under the ``STALL SPEEDS'' paragraph with the text in 
Appendix 5 of this AD.
    (ii) Replace the ``WARNING'' text in the LIMITATIONS section of 
the Cessna Models 208 or 208B POH and FAA-approved AFM KNOWN ICING 
EQUIPMENT SUPPLEMENT S1 under ``ENVIRONMENTAL CONDITIONS'' with: 
``FLIGHT IN THESE CONDITIONS ARE PROHIBITED.''
    (iii) Replace the last two sentences in the LIMITATIONS section 
of the Cessna Models 208 or 208B POH and FAA-approved AFM KNOWN 
ICING EQUIPMENT SUPPLEMENT S1 under ``ENVIRONMENTAL CONDITIONS'' 
with the following text: ``Exit strategies should be determined 
during pre-flight planning.''

Alternative Methods of Compliance (AMOCs)

    (j) The Manager, Wichita Aircraft Certication (ACO), has the 
authority to approve AMOCs for this AD, if requested using the 
procedures found in 14 CFR 39.19. Send information to ATTN: Robert 
P. Busto, Aerospace Engineer, Wichita ACO, FAA, 1801 Airport Road, 
Wichita, Kansas 67209; telephone: (316) 946-4157; fax: (316) 946-
4107. Before using any approved AMOC on any airplane to which the 
AMOC applies, notify your appropriate principal inspector (PI) in 
the FAA Flight Standards District Office (FSDO), or lacking a PI, 
your local FSDO.
    (k) AMOCs approved for AD 2006-06-06 are approved for this AD 
until the actions in paragraph (e) of this AD are done. After this, 
they are no longer valid. The paragraph designations of the AMOC 
refer to paragraphs (e) and (f) of AD 2006-06-06, which are 
paragraphs (h) and (i) of this AD respectively.

Related Information

    (l) To get copies of the AFM supplements and service information 
referenced in this AD, contact: Cessna Aircraft Company, Product 
Support, P.O. Box 7706, Wichita, Kansas 67277. To view the AD 
docket, go to the Docket Management Facility; U.S. Department of 
Transportation, 400 Seventh Street, SW., Nassif Building, Room PL-
401, Washington, DC, or on the Internet at http://dms.dot.gov. The 
docket number is Docket No. FAA-2006-26498; Directorate Identifier 
2006-CE-83-AD.

Appendix 1 Retained From AD 2006-06-06

Changes to the Cessna Models 208 or 208B Pilot's Operating Handbook 
(POH) and FAA-Approved Airplane Flight Manual (AFM)

Affected Cessna Models 208 or 208B POH and FAA-Approved AFM

    Insert the following text at the beginning of the KINDS OF 
OPERATION LIMITS paragraph in the LIMITATIONS section of the Cessna 
Models 208 or 208B POH and FAA-approved AFM. This may be done by 
inserting a copy of this AD into the POH/AFM:
    ``Continued flight after encountering moderate or greater icing 
conditions is prohibited. One or more of the following defines 
moderate icing conditions for this airplane:
    Indicated airspeed in level cruise flight at constant power 
decreases by 20 knots.
    Engine torque required to maintain airspeed increases by 400 ft. 
lbs.
    Airspeed of 120 KIAS cannot be maintained in level flight.
    An accretion of \1/4\-inch of ice is observed on the wing strut.
    Disregard any mention of approval for flight in icing conditions 
within the POH/AFM.''

Appendix 2 Retained From AD 2006-06-06

Changes to the Cessna Models 208 or 208B Pilot's Operating Handbook 
(POH) and FAA-Approved Airplane Flight Manual (AFM)

Affected Cessna Models 208 or 208B POH and FAA-Approved AFM

    Insert the following text in the LIMITATIONS section of the POH 
and FAA-approved AFM KNOWN ICING EQUIPMENT SUPPLEMENT S1, at the 
beginning of the paragraph ``REQUIRED EQUIPMENT.'' This may be done 
by inserting a copy of this AD into the POH/AFM:
    ``Continued flight after encountering moderate or greater icing 
conditions is prohibited. One or more of the following defines 
moderate icing conditions for this airplane:
    Indicated airspeed in level flight at constant power decreases 
by 20 knots.
    Engine torque required to maintain airspeed increases by 400 ft. 
lbs.
    Airspeed of 120 KIAS cannot be maintained in level flight.
    An accretion of \1/4\-inch of ice is observed on the wing strut.
    Disregard any mention of approval for flight in icing conditions 
within the POH/AFM.''

Appendix 3 Retained From AD 2006-06-06

Cessna Model 208 Airplanes and Model 208B Airplanes, Equipped With 
Airframe Deicing Pneumatic Boots, That Are Not Currently Prohibited 
From Flight in Known or Forecast Icing

    Install a placard with black letters on a white background. The 
placard shall be located on the instrument panel in one of the 
following areas: Under the radio stack, immediately above the 
pilot's flight instruments, or below the pilot's vertical speed 
indicator. Lettering on the placard shall be a minimum \1/8\-inch 
tall and state the following:
    ``Continued flight after encountering moderate or greater icing 
conditions is prohibited. One or more of the following defines 
moderate icing conditions for this airplane:
    Airspeed in level flight at constant power decreases by 20 KIAS.
    Engine torque required to maintain airspeed increases by 400 ft. 
lbs.
    120 KIAS cannot be maintained in level flight.
    Ice accretion of 1/4 inch observed on the wing strut.''

[[Page 27730]]

Appendix 4 Retained From AD 2006-06-06

Changes to the Cessna Models 208 or 208B Pilot's Operating Handbook 
(POH) and FAA-Approved Airplane Flight Manual (AFM) Supplement S1

Affected Cessna Models 208 or 208B POH and FAA-Approved AFM and 
FAA-Approved Supplement S1

    Insert the following text into the LIMITATIONS section under the 
``AIRSPEED LIMITATIONS'' paragraph of the Cessna Models 208 or 208B 
POH and FAA-approved AFM, and replace the text in the KNOWN ICING 
EQUIPMENT SUPPLEMENT S1 under the ``MINIMUM SPEED IN ICING 
CONDITIONS'' paragraph with the following text. This may be done by 
inserting a copy of this AD into the POH/AFM:
    ``Minimum airspeed in icing conditions, for all flight phases 
including approach, except takeoff and landing:

Flaps up: 120 KIAS
Flaps 10[deg]: 105 KIAS
Flaps 20[deg]: 95 KIAS

    Exception for flaps up: when climbing to exit icing conditions 
airspeed can be reduced to 110 KIAS minimum.
    Flaps must be extended during all phases (takeoff and landing 
included) at airspeeds below 110 KIAS, except adhere to published 
AFM procedures when operating with ground deicing/anti-icing fluid 
applied.

Warning

    The aural stall warning system does not function properly in all 
icing conditions and should not be relied upon to provide adequate 
stall warning when in icing conditions.''

    Note: These are minimum speeds for operations in icing 
conditions. Disregard any reference to the original speeds within 
the POH/AFM.

Appendix 5 Retained From AD 2006-06-06

Changes to the Cessna Models 208 or 208B Pilot's Operating Handbook 
(POH) and FAA-Approved Airplane Flight Manual (AFM) Supplement S1

    Replace the text in the PERFORMANCE section of the POH/AFM KNOWN 
ICING EQUIPMENT SUPPLEMENT S1 under the ``STALL SPEEDS'' paragraph 
with the following text:
    ``Ice accumulation on the airframe may result in a 20 KIAS 
increase in stall speed. Either buffet or aural stall warning should 
be treated as an imminent stall.''
    ``WARNING--The aural stall warning system does not function 
properly in all icing conditions and should not be relied upon to 
provide adequate stall warning when in icing conditions.''

    Issued in Kansas City, Missouri, on May 10, 2007.
David R. Showers,
Acting Manager, Small Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. E7-9398 Filed 5-16-07; 8:45 am]
BILLING CODE 4910-13-P