[Federal Register Volume 62, Number 91 (Monday, May 12, 1997)]
[Rules and Regulations]
[Pages 25833-25834]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 97-12042]
-----------------------------------------------------------------------
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. 96-NM-144-AD; Amendment 39-10019; AD 97-10-07]
RIN 2120-AA64
Airworthiness Directives; Construcciones Aeronauticas, S.A.
(CASA) Model CN-235 Series Airplanes
AGENCY: Federal Aviation Administration, DOT.
ACTION: Final rule.
-----------------------------------------------------------------------
SUMMARY: This amendment adopts a new airworthiness directive (AD),
applicable to certain CASA Model CN-235 series airplanes, that requires
disabling the brake control valve of the propeller. This amendment also
requires that, prior to restoring propeller brake operation, the
propeller brake control unit be replaced with a certain new propeller
brake control unit. This amendment is prompted by reports of
uncommanded activation of the propeller brake system on in-service
airplanes during flight, due to the existing design of the brake
control valve. The actions specified by this AD are intended to prevent
in-flight uncommanded activation of the propeller brake system, which
could result in in-flight shutdown of the engine.
DATES: Effective June 16, 1997.
The incorporation by reference of certain publications listed in
the regulations is approved by the Director of the Federal Register as
of June 16, 1997.
ADDRESSES: The service information referenced in this AD may be
obtained from Construcciones Aeronauticas, S.A., Getafe, Madrid, Spain.
This information may be examined at the Federal Aviation Administration
(FAA), Transport Airplane Directorate, Rules Docket, 1601 Lind Avenue,
SW., Renton, Washington; or at the Office of the Federal Register, 800
North Capitol Street, NW., suite 700, Washington, DC.
FOR FURTHER INFORMATION CONTACT: Greg Dunn, Aerospace Engineer,
Standardization Branch, ANM-113, FAA, Transport Airplane Directorate,
1601 Lind Avenue, SW., Renton, Washington 98055-4056; telephone (425)
227-2799; fax (425) 227-1149.
SUPPLEMENTARY INFORMATION: A proposal to amend part 39 of the Federal
Aviation Regulations (14 CFR part 39) to include an airworthiness
directive (AD) that is applicable to certain CASA Model CN-235 series
airplanes was published in the Federal Register on February 19, 1997
(62 FR 7378). That action proposed to require, first, disabling the
brake control valve of the propeller. Then, prior to restoring
propeller brake operation, the action proposed to require replacement
of certain propeller brake control units with certain new propeller
brake control units.
Interested persons have been afforded an opportunity to participate
in the making of this amendment. No comments were submitted in response
to the proposal or the FAA's determination of the cost to the public.
Conclusion
The FAA has determined that air safety and the public interest
require the adoption of the rule as proposed.
Cost Impact
The FAA estimates that 2 CASA Model CN-235 series airplanes of U.S.
registry will be affected by this AD.
It will take approximately 3 work hours per airplane to accomplish
the required disabling of the brake control valve, at an average labor
rate of $60 per work hour. Based on these figures, the cost impact of
this required action on U.S. operators is estimated to be $360, or $180
per airplane.
It will take approximately 8 work hours per airplane to accomplish
the required replacement, at an average labor rate of $60 per work
hour. Required parts will be supplied by the manufacturer at no cost to
the operators. Based on these figures, the cost impact of this required
action on U.S. operators is estimated to be $960, or $480 per airplane.
The cost impact figures discussed above are based on assumptions
that no operator has yet accomplished any of the requirements of this
AD action, and that no operator would accomplish those actions in the
future if this AD were not adopted.
[[Page 25834]]
Regulatory Impact
The regulations adopted herein will not have substantial direct
effects 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, in
accordance with Executive Order 12612, it is determined that this final
rule does not have sufficient federalism implications to warrant the
preparation of a Federalism Assessment.
For the reasons discussed above, I certify that this action (1) is
not a ``significant regulatory action'' under Executive Order 12866;
(2) is not a ``significant rule'' under 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. A final evaluation has been prepared for this action
and it is contained in the Rules Docket. A copy of it 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 adding the following new
airworthiness directive:
97-10-07 Construcciones Aeronauticas, S.A., CASA: Amendment 39-
10019. Docket 96-NM-144-AD.
Applicability: All Model CN-235, CN-235-100, and CN-235-200
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 prevent in-flight uncommanded activation of the propeller
brake system, which could result in in-flight shutdown of the
engine, accomplish the following:
(a) Within 10 days after the effective date of this AD, disable
the brake control valve of the propeller in accordance with Annex 1
of CASA Communication COM 235-82, Revision 3, dated January 31,
1995.
(b) Prior to restoring propeller brake operation, replace the
propeller brake control unit having part number (P/N) HP1410100-5 or
HP1410100-7, with a new propeller brake control unit having P/N
HP1410100-9, in accordance with CASA Service Bulletin SB-235-61-01,
dated October 11, 1994; or CASA Service Bulletin SB-235-61-01M,
Revision 2 (for military airplanes), dated January 25, 1996; as
applicable. Accomplishment of this replacement constitutes
terminating action for the requirements of paragraph (a) of this AD.
(c) 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, Standardization Branch, ANM-113,
FAA, Transport Airplane Directorate. Operators shall submit their
requests through an appropriate FAA Principal Maintenance Inspector,
who may add comments and then send it to the Manager,
Standardization Branch, ANM-113.
Note 2: Information concerning the existence of approved
alternative methods of compliance with this AD, if any, may be
obtained from the Standardization Branch, ANM-113.
(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.
(e) Disabling the brake control valve of the propeller shall be
done in accordance with Annex 1 of CASA Communication COM 235-82,
Revision 3, dated January 31, 1995. The replacement shall be done in
accordance with CASA Service Bulletin SB-235-61-01, dated October
11, 1994; or CASA Service Bulletin SB-235-61-01M, Revision 2, dated
January 25, 1996; as applicable. CASA Service Bulletin SB-235-61-
01M, Revision 2, dated January 25, 1996, contains the following list
of effective pages:
------------------------------------------------------------------------
Revision level shown on
Page No. page Date shown on page
------------------------------------------------------------------------
1..................... 1...................... November 27, 1995.
2..................... 2...................... January 25, 1996.
3-11.................. Original............... October 11, 1994.
------------------------------------------------------------------------
This incorporation by reference was approved by the Director of
the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR
part 51. Copies may be obtained from Construcciones Aeronauticas,
S.A., Getafe, Madrid, Spain. Copies may be inspected at the FAA,
Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton,
Washington; or at the Office of the Federal Register, 800 North
Capitol Street, NW., suite 700, Washington, DC.
(f) This amendment becomes effective on June 16, 1997.
Issued in Renton, Washington, on May 2, 1997.
S.R. Miller,
Acting Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 97-12042 Filed 5-9-97; 8:45 am]
BILLING CODE 4910-13-U