AD 2001-06-18

[Federal Register Volume 66, Number 62 (Friday, March 30, 2001)]
[Rules and Regulations]
[Pages 17348-17351]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 01-7734]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. 2001-NM-36-AD; Amendment 39-12165; AD 2001-06-18]
RIN 2120-AA64


Airworthiness Directives; Empresa Brasileira de Aeronautica, S.A. 
(EMBRAER), Model EMB-120 Series Airplanes

AGENCY: Federal Aviation Administration, DOT.

ACTION: Final rule; request for comments.

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SUMMARY: This amendment supersedes an existing airworthiness directive 
(AD), applicable to all EMBRAER Model EMB-120 series airplanes, that 
currently requires revising the Airplane Flight Manual (AFM) to include 
requirements for activation of the ice protection systems and to add 
information regarding operation in icing conditions; installing an ice 
detector system; and revising the AFM to include procedures for testing 
system integrity. That AD also requires installing the ice detector 
system in accordance with revised procedures. That amendment was 
prompted by issuance of mandatory continuing airworthiness information 
by a foreign civil airworthiness authority. This amendment corrects and 
clarifies certain AFM procedures, and provides for an alternative AFM 
revision. The actions specified by this AD are intended to ensure that 
the flightcrew is able to recognize the formation of significant ice 
accretion and take appropriate action; such formation of ice could 
result in reduced controllability of the airplane in normal icing 
conditions.

DATES: Effective April 16, 2001.
    The incorporation by reference of certain publications, as listed 
in the regulations, was approved previously by the Director of the 
Federal Register as of March 5, 2001 (66 FR 8082, January 29, 2001).
    Comments for inclusion in the Rules Docket must be received on or 
before April 30, 2001.

ADDRESSES: Submit comments in triplicate to the Federal Aviation 
Administration (FAA), Transport Airplane Directorate, ANM-114, 
Attention: Rules Docket No. 2001-NM-36-AD, 1601 Lind Avenue, SW., 
Renton, Washington 98055-4056. Comments may be inspected at this 
location between 9:00 a.m. and 3:00 p.m., Monday through Friday, except 
Federal holidays. Comments may be submitted via fax to (425) 227-1232. 
Comments may also be sent via the Internet using the following address: 
<a href="/cdn-cgi/l/email-protection#3900145857541450584b5a5654545c574d795f5858175e564f"><span class="__cf_email__" data-cfemail="5f66723e313272363e2d3c3032323a312b1f393e3e71383029">[email&#160;protected]</span></a>. Comments sent via fax or the Internet must 
contain ``Docket No. 2001-NM-36-AD'' in the subject line and need not 
be submitted in triplicate. Comments sent via the Internet as attached 
electronic files must be formatted in Microsoft Word 97 for Windows or 
ASCII text.
    The service information referenced in this AD may be obtained from 
Empresa Brasileira de Aeronautica S.A. (EMBRAER), P.O. Box 343--CEP 
12.225, Sao Jose dos Campos--SP, Brazil. This information may be 
examined at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, 
SW., Renton, Washington; or at the FAA, Atlanta Aircraft Certification 
Office, One Crown Center, 1895 Phoenix Boulevard, suite 450, Atlanta, 
Georgia; or at the Office of the Federal Register, 800 North Capitol 
Street, NW., suite 700, Washington, DC.

FOR FURTHER INFORMATION CONTACT: Thomas Peters, Aerospace Engineer, 
Systems and Flight Test Branch, ACE-116A, FAA, Atlanta Aircraft 
Certification Office, One Crown Center, 1895 Phoenix Boulevard, suite 
450, Atlanta, Georgia 30349; telephone (770) 703-6063; fax (770) 703-
6097.

SUPPLEMENTARY INFORMATION: On January 17, 2001, the FAA issued AD 2001-
02-06, amendment 39-12090 (66 FR 8082, January 29, 2001), applicable to 
all EMBRAER Model EMB-120 series airplanes, to require revising the 
Airplane Flight Manual (AFM) to include requirements for activation of 
the ice protection systems and to add information regarding operation 
in icing conditions; installing an ice detector system; and revising 
the AFM to include procedures for testing system integrity. That AD 
also requires installing the ice detector system in accordance with 
revised procedures. That action was prompted by issuance of mandatory 
continuing airworthiness information by a foreign civil airworthiness 
authority. The actions specified by that AD are intended to ensure that 
the flightcrew is able to recognize the formation of significant ice 
accretion and take appropriate action; such formation of ice could 
result in reduced controllability of the airplane in normal icing 
conditions.

Actions Since Issuance of Previous Rule

    Since the issuance of AD 2001-02-06, the FAA has noted that a 
typographical error appeared in paragraph (a)(2) of that AD, which 
specified certain AFM revisions. Paragraph (a)(2) of the AD should have 
read, ``AIRSPEED (Flaps and Gear Up) . . . . . 160 KIAS MINIMUM'' 
instead of ``. . . 60 KIAS MINIMUM.'' While the typographical error may 
be readily apparent to a pilot rated in the EMBRAER Model EMB-120 
series airplane, there is no way to know what the correct figure should 
be. Therefore, in view of the effective date of AD 2001-02-06 (March 5, 
2001), we consider it necessary to supersede the existing AD to correct 
and clarify that AFM revision.
    In addition, the FAA has been advised that EMBRAER has issued 
Revision 50 of AFM-120-794, dated November 3, 1997, which contains 
revised

[[Page 17349]]

procedures for activation of the ice protection systems and adds 
information regarding operation in icing conditions; installing an ice 
detector system; and revises the AFM to include procedures for testing 
system integrity.
    The Departmento de Aviacao Civil (DAC), which is the airworthiness 
authority for Brazil, classified Revision 50 of the AFM as mandatory, 
in order to assure the continued airworthiness of these airplanes in 
Brazil.

FAA's Conclusions

    This airplane model is manufactured in Brazil and is type 
certificated for operation in the United States under the provisions of 
section 21.29 of the Federal Aviation Regulations (14 CFR 21.29) and 
the applicable bilateral airworthiness agreement. Pursuant to this 
bilateral airworthiness agreement, the Departmento de Aviacao Civil 
(DAC), which is the airworthiness authority for Brazil, has kept the 
FAA informed of the situation described above. The FAA has examined the 
findings of the DAC, reviewed all available information, and determined 
that AD action is necessary for products of this type design that are 
certificated for operation in the United States.

Explanation of Requirements of Rule

    Since an unsafe condition has been identified that is likely to 
exist or develop on other airplanes of the same type design registered 
in the United States, this AD supersedes AD 2001-02-06 to require 
revision of the Normal Procedures Section of the current AFM. The 
revision corrects and clarifies the Normal Procedures Section of the 
current AFM revision, which currently specifies that when atmospheric 
or ground icing conditions exist, ``AIRSPEED (Flaps and Gear Up) . . . 
60 KIAS.'' The revision corrects the reference to 60 KIAS to read ``160 
KIAS.''
    This AD also provides an alternative method of compliance to revise 
the AFM required by paragraph (a) of this AD.

Determination of Rule's Effective Date

    Since a situation exists that requires the immediate adoption of 
this regulation, it is found that notice and opportunity for prior 
public comment hereon are impracticable, and that good cause exists for 
making this amendment effective in less than 30 days.

Comments Invited

    Although this action is in the form of a final rule that involves 
requirements affecting flight safety and, thus, was not preceded by 
notice and an opportunity for public comment, comments are invited on 
this rule. Interested persons are invited to comment on this rule by 
submitting such written data, views, or arguments as they may desire. 
Communications shall identify the Rules Docket number and be submitted 
in triplicate to the address specified under the caption ADDRESSES. All 
communications received on or before the closing date for comments will 
be considered, and this rule may be amended in light of the comments 
received. Factual information that supports the commenter's ideas and 
suggestions is extremely helpful in evaluating the effectiveness of the 
AD action and determining whether additional rulemaking action would be 
needed.
    Submit comments using the following format:
    <bullet> Organize comments issue-by-issue. For example, discuss a 
request to change the compliance time and a request to change the 
service bulletin reference as two separate issues.
    <bullet> For each issue, state what specific change to the AD is 
being requested.
    <bullet> Include justification (e.g., reasons or data) for each 
request.
    Comments are specifically invited on the overall regulatory, 
economic, environmental, and energy aspects of the rule that might 
suggest a need to modify the rule. All comments submitted will be 
available, both before and after the closing date for comments, in the 
Rules Docket for examination by interested persons. A report that 
summarizes each FAA-public contact concerned with the substance of this 
AD will be filed in the Rules Docket.
    Commenters wishing the FAA to acknowledge receipt of their comments 
submitted in response to this rule must submit a self-addressed, 
stamped postcard on which the following statement is made: ``Comments 
to Docket Number 2001-NM-36-AD.'' The postcard will be date stamped and 
returned to the commenter.

Regulatory Impact

    The regulations adopted herein 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. Therefore, it 
is determined that this final rule does not have federalism 
implications under Executive Order 13132.
    The FAA has determined that this regulation is an emergency 
regulation that must be issued immediately to correct an unsafe 
condition in aircraft, and that it is not a ``significant regulatory 
action'' under Executive Order 12866. It has been determined further 
that this action involves an emergency regulation under DOT Regulatory 
Policies and Procedures (44 FR 11034, February 26, 1979). If it is 
determined that this emergency regulation otherwise would be 
significant under DOT Regulatory Policies and Procedures, a final 
regulatory evaluation will be prepared and placed in the Rules Docket. 
A copy of it, if filed, may be obtained from the Rules Docket at the 
location provided under the caption ADDRESSES.

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, Incorporation by 
reference, Safety.

Adoption of the Amendment

    Accordingly, pursuant to 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

    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]

    2. Section 39.13 is amended by removing amendment 39-12090 (66 FR 
8082, January 29, 2001), and by adding a new airworthiness directive 
(AD), amendment 39-12165, to read as follows:

2001-06-18  Empresa Brasileira de Aeronautica, S.A. (EMBRAER): 
Amendment 39-12165. Docket 2001-NM-36-AD. Supersedes AD 2001-02-06, 
Amendment 39-12090.

    Applicability: All Model EMB-120 series airplanes, certificated 
in any category.

    Note 1: This AD applies to each airplane identified in the 
preceding applicability provision, regardless of whether it has been 
[otherwise] modified, altered, or repaired in the area subject to 
the requirements of this AD. For airplanes that have been modified, 
altered, or repaired so that the performance of the requirements of 
this AD is affected, the owner/operator must request approval for an 
alternative method of compliance in accordance with paragraph (c) of 
this AD. The request should include an assessment of the effect of 
the modification, alteration, or repair on the unsafe condition 
addressed by this AD; and, if the unsafe condition has not been 
eliminated, the request should include specific proposed actions to 
address it.

    Compliance: Required as indicated, unless accomplished 
previously.
    To ensure that the flightcrew is able to recognize the formation 
of significant ice

[[Page 17350]]

accretion, which could result in reduced controllability of the 
airplane in normal icing conditions, accomplish the following:

Restatement of the Requirements of AD 2001-02-06

    (a) Within 30 days after January 23, 1998 (the effective date of 
AD 97-26-06, amendment 39-10249), accomplish paragraphs (a)(1) and 
(a)(2) of this AD.

AFM Revisions--Limitations Section

    (1) Revise the Limitations Section of the FAA-approved Airplane 
Flight Manual (AFM) to include the following requirements for 
activation of the ice protection systems. This may be accomplished 
by inserting a copy of this AD in the AFM.

``TURN ON ICE PROTECTION SYSTEM and IGNITION SWITCHES AS FOLLOWS:

    <bullet> AOA, TAT, SLIP, ENGINE AIR INLET, and IGNITION 
SWITCHES:

--When atmospheric or ground icing conditions exist.

    <bullet> PROPELLER:

--When atmospheric or ground icing conditions exist, OR
--At the first sign of ice formation anywhere on the aircraft.

    <bullet> WING and TAIL LEADING EDGES, and WINDSHIELD:

--At the first sign of ice formation anywhere on the aircraft.

NOTE: On takeoff, delay activation of the wing and tail leading edge 
de-ice systems until reaching the final segment speed.

NOTE: Atmospheric icing conditions exist when:

--Indicated Outside Air Temperature (OAT) during ground operations 
or Total Air Temperature (TAT) in flight is 10 degrees C or below; 
and
--Visible moisture in any form is present (such as clouds, fog with 
visibility of one mile or less, rain, snow, sleet, or ice crystals).

NOTE: Ground icing conditions exist when:

--Indicated OAT during ground operations is 10 degrees C or below; 
and
--Surface snow, standing water, or slush is present on the ramps, 
taxiways, or runways.

NOTE: For Operation in Atmospheric Icing Conditions:

--Follow the procedures in the Normal Procedures Section under 
Operation in Icing Conditions.''

AFM Revisions--Normal Procedures Section

    (2) Revise the Normal Procedures Section of the FAA-approved AFM 
to include the following additional and revised information 
regarding operation in 1 icing conditions. This may be accomplished 
by inserting a copy of this AD in the AFM.

``Under DAILY CHECKS of the Ice Protection System, add the following:
The following tests must be performed prior to the first flight of the day for which known or forecast icing
 conditions are anticipated.
    Ice Detector System TEST Button (if          PRESS Check normal test sequence.
     installed).
Under APPROACH Checklist, add the following:
    Minimum Airspeed...........................  APPROPRIATE TO FLAP POSITION
                                                 (See Table Below).
 


------------------------------------------------------------------------
                                                Minimum  recommended
                 Gear/Flap                            airspeed
------------------------------------------------------------------------
UP/0 deg..................................  150 KIAS
UP/15 deg.................................  130 KIAS
------------------------------------------------------------------------


Under OPERATION IN ICING CONDITIONS for FLYING INTO ICING CONDITION,
 replace the current AFM section information for normal icing conditions
 with the following:
 
--During flight, monitoring for icing conditions should start whenever
 the indicated outside air temperature is near or below freezing or when
 operating into icing conditions, as specified in the Limitations
 Section of this manual.
--When operating in icing conditions, the front windshield corners
 (unheated areas), propeller spinners, and wing leading edges will
 provide good visual cues of ice accretion.
--For airplanes equipped with an ice detection system, icing conditions
 will also be indicated by the illumination of the ICE CONDITION light
 on the multiple alarm panel.
--When atmospheric or ground icing conditions exist, proceed as follows:
 
AOA, TAT, SLIP, and ENGINE AIR INLET........  ON
IGNITION Switches...........................  ON
AIRSPEED (Flaps and Gear UP)................  160 KIAS
                                              MINIMUM
--When atmospheric or ground icing conditions exist, OR
--At the first sign of ice formation anywhere on the aircraft, proceed
 as follows:
    PROPELLER Deicing Switch................  ON
        Select NORM mode if indicated OAT is
         above--10 deg.C (14 deg.F) or COLD
         mode if indicated OAT is below--10
         deg.C (14 deg.F)
 
 --At the first sign of ice formation anywhere on the aircraft, proceed
 as follows:
    WINDSHIELD..............................  ON
    WING and TAIL LEADING EDGE..............  ON
        Visually evaluate the severity of
         the ice encounter and the rate of
         accretion and select light or heavy
         mode (1-minute or 3-minute cycle)
         based on this evaluation
NOTE: On takeoff, delay activation of the wing and tail leading edge de-
 ice systems until reaching the final segment speed.
NOTE: The minimum NH required for proper operation of the pneumatic
 deicing system is 80%. At lower NH values, the pneumatic deicing system
 may not totally inflate, and the associated failure lights on the
 overhead panel may illuminate. If this occurs, increase NH.

[[Page 17351]]

 
Holding configuration:
    Landing Gear Lever......................  UP
    Flap Selector Lever.....................  UP
    N<INF>P</INF>......................................  85% MINIMUM
        Increase N<INF>P</INF> as required to eliminate
         propeller vibrations
Approach and Landing procedure:
    Increase approach and landing speeds,
     according to the following flap
     settings, until landing is assured.
     Reduce airspeed to cross runway
     threshold (50 ft) at V<INF>REF</INF>.
    Flaps 15--Increase Speed by 10 KIAS
     (130+10)
    Flaps 25--Increase Speed by 10 KIAS
     (V<INF>REF25</INF>+10)
    Flaps 45--Increase Speed by 5 KIAS
     (V<INF>REF45</INF>+5)
 
 Go-Around procedure:
Reduce values from Maximum Landing Weight Approach Climb Limited charts
 by:
    1500 lbs. for PW 118 Engines
    1544 lbs. for PW 118A and 118B Engines
Flaps 15--Increase approach climb speed by 10 KIAS (V<INF>2</INF>+10);
    Decrease approach climb gradient by:
        3.0% for PW 118 Engines
        2.9% for PW 118A and 118B Engines
Flaps 25--Increase landing climb speed by 10 KIAS (V<INF>REF25</INF>+10)
Flaps 45--Increase landing climb speed by 5 KIAS (V<INF>REF</INF>+5)
CAUTION: The ice protection systems must be turned on immediately
 (except leading edge de-icers during takeoff) when the ICE CONDITION
 light illuminates on the multiple alarm panel or when any ice accretion
 is detected by visual observation or other cues.
CAUTION: Do not interrupt the automatic sequence of operation of the
 leading edge de-ice boots once it is turned ON. The system should be
 turned OFF only after leaving the icing conditions and after the
 protected surfaces of the wing are free of ice.''
 

Ice Detector Installation

    (b) For airplanes identified in any of Parts I, II, III, IV, V, 
and VI of EMBRAER Service Bulletin 120-30-0027, Change 02, dated 
December 3, 1997; Change 03, dated June 26, 1998; or Change 04, 
dated July 13, 1999: Within 30 days after March 5, 2001, (the 
effective date of AD 2001-02-06, amendment 39-12090), install an ice 
detector system in accordance with the service bulletin.

Alternative Methods of Compliance

    (c)(1) An alternative method of compliance or adjustment of the 
compliance time that provides an acceptable level of safety may be 
used if approved by the Manager, Atlanta Aircraft Certification 
Office (ACO), FAA. Operators shall submit their requests through an 
appropriate FAA Principal Maintenance Inspector, who may add 
comments and then send it to the Manager, Atlanta ACO.
    (2) Alternative methods of compliance, approved previously in 
accordance with AD 97-26-06, amendment 39-10249, are approved as 
alternative methods of compliance with this AD.
    (3) Incorporation of Revision 50 of the EMBRAER AFM-120/79, 
dated November 3, 1997, into the AFM, is considered to be an 
approved alternative method of compliance with the requirements of 
paragraph (a) of this AD.

    Note 2: Information concerning the existence of approved 
alternative methods of compliance with this AD, if any, may be 
obtained from the Atlanta ACO.

Special Flight Permits

    (d) Special flight permits may be issued in accordance with 
sections 21.197 and 21.199 of the Federal Aviation Regulations (14 
CFR 21.197 and 21.199) to operate the airplane to a location where 
the requirements of this AD can be accomplished.

Incorporation by Reference

    (e) The ice detector system installation shall be done in 
accordance with EMBRAER Service Bulletin 120-30-0027, Change 02, 
dated December 3, 1997; EMBRAER Service Bulletin 120-30-0027, Change 
03, dated June 26, 1998; or EMBRAER Service Bulletin 120-30-0027, 
and Change 04, dated July 13, 1999. The incorporation by reference 
of those documents was approved previously by the Director of the 
Federal Register, as of March 5, 2001 (66 FR 8082, January 29, 
2001). Copies may be obtained from Empresa Brasileira de Aeronautica 
S.A. (EMBRAER), P.O. Box 343--CEP 12.225, Sao Jose dos Campos--SP, 
Brazil. Copies may be inspected at the FAA, Transport Airplane 
Directorate, 1601 Lind Avenue, SW., Renton, Washington; or at the 
FAA, Atlanta Aircraft Certification Office, One Crown Center, 1895 
Phoenix Boulevard, suite 450, Atlanta, Georgia; or at the Office of 
the Federal Register, 800 North Capitol Street, NW., suite 700, 
Washington, DC.

    Note 3: The subject of this AD is addressed in Brazilian 
airworthiness directive 97-06-03R1, dated December 15, 1997.

Effective Date

    (f) This amendment becomes effective on April 16, 2001.

    Issued in Renton, Washington, on March 23, 2001.
Donald L. Riggin,
Acting Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 01-7734 Filed 3-29-01; 8:45 am]
BILLING CODE 4910-13-P