AD 2004-09-39

[Federal Register Volume 69, Number 91 (Tuesday, May 11, 2004)]
[Rules and Regulations]
[Pages 26001-26003]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 04-10372]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. 2002-NM-200-AD; Amendment 39-13630; AD 2004-09-39]
RIN 2120-AA64


Airworthiness Directives; Saab Model SAAB 340B Series Airplanes 
Equipped with Hamilton Sundstrand Propellers

AGENCY: Federal Aviation Administration, DOT.

ACTION: Final rule.

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SUMMARY: This amendment adopts a new airworthiness directive (AD), 
applicable to certain Saab Model SAAB 340B series airplanes equipped 
with Hamilton Sundstrand propellers. This amendment requires a one-time 
inspection of two remote controlled circuit breakers (RCCB), located in 
specific electrical compartments, to identify the part number, and 
replacement of the RCCBs with new RCCBs having a different part number 
if necessary. This action is necessary to ensure removal of 35-ampere 
(amp) RCCBs on a 50-amp electrical circuit. Incorrect RCCBs on an 
electrical circuit could result in erroneous tripping of the RCCBs 
(even though an overload condition does not exist), premature failure 
of the RCCBs, loss of power to the feather pump system, and consequent 
reduced controllability of the airplane. This action is intended to 
address the identified unsafe condition.

DATES: Effective June 15, 2004.
    The incorporation by reference of a certain publication listed in 
the

[[Page 26002]]

regulations is approved by the Director of the Federal Register as of 
June 15, 2004.

ADDRESSES: The service information referenced in this AD may be 
obtained from Saab Aircraft AB, SAAB Aircraft Product Support, S-
581.88, Link[ouml]ping, Sweden. 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 
National Archives and Records Administration (NARA). For information on 
the availability of this material at NARA, call (202) 741-6030, or go 
to: <a href="http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html">http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html</a>.

FOR FURTHER INFORMATION CONTACT: Rosanne Ryburn, Aerospace Engineer, 
International Branch, ANM-116, FAA, Transport Airplane Directorate, 
1601 Lind Avenue, SW., Renton, Washington 98055-4056; telephone (425) 
227-2139; 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 Saab Model SAAB 340B 
series airplanes equipped with Hamilton Sundstrand propellers was 
published in the Federal Register on November 18, 2002 (67 FR 69491). 
That action proposed to require a one-time inspection of two remote 
controlled circuit breakers (RCCB), located in specific electrical 
compartments, to identify the part number, and replacement of the RCCBs 
with new RCCBs having a different part number if necessary.

Comments

    Interested persons have been afforded an opportunity to participate 
in the making of this amendment. Due consideration has been given to 
the single comment received.

Request To Clarify RCCBs in the ``Parts Installation'' Paragraph

    The commenter requests that the RCCBs in the ``Parts Installation'' 
paragraph (paragraph (b) of the proposed AD) be clarified. The 
commenter notes that the referenced Saab service bulletin refers to two 
specific RCCBs while the proposed AD does not refer to any specific 
RCCBs. The commenter also states that the RCCBs are used in a number of 
different applications in SAAB Model 340B series airplanes. The 
commenter suggests the ``Parts Installation'' paragraph be revised to 
state: ``As of the effective date of this AD, no person shall install 
an RCCB 29KFC, P/N M83383-02-07, in electrical compartment 407VU or 
RCCB 30KFC, P/N M83383-02-07, in electrical compartment 408VU, on any 
airplane with Hamilton Sundstrand propeller installed.''
    The FAA agrees that the RCCBs in ``Parts Installation'' paragraph 
(b) of the final rule be clarified for the reasons stated by the 
commenter. Accordingly we have revised paragraph (b) of the final rule 
to state: ``As of the effective date of this AD, no person shall 
install P/N M83383-02-07 at RCCB 29KFC in electrical compartment 407VU 
or RCCB 30KFC in electrical compartment 408VU, on any airplane equipped 
with Hamilton Sundstrand propellers.''

Request To Clarify RCCBs in the ``Explanation of Relevant Service 
Information'' Paragraph

    The commenter requests that the RCCBs in the ``Explanation of 
Relevant Service Information'' paragraph of the proposed AD be 
clarified for the reasons stated in the previous request (i.e. 
``Request to Clarify RCCBs in the `Parts Installation' Paragraph''). 
The commenter suggests that the ``Explanation of Relevant Service 
Information'' paragraph be revised to read ``* * * identify the part 
number of the RCCB 29KFC in the electrical compartment 407VU and RCCB 
30KFC located in electrical compartment * * *''
    We agree that the RCCBs in the ``Explanation of Relevant Service 
Information'' paragraph of the proposed AD be clarified for the reasons 
given by commenter. As suggested by the commenter, RCCB 29KFC and RCCB 
30KFC should be specified in the ``Explanation of Relevant Service 
Information'' paragraph. However, because the preamble of the proposed 
AD is not repeated in the final rule, no change is necessary to the 
final rule.

Request To Revise Applicable Number of Airplanes

    The commenter also requests to revise the estimated number of U.S. 
airplanes listed in the ``Cost Impact'' paragraph of the proposed AD. 
The commenter states that the SAAB service bulletin is effective for 
airplanes equipped with Hamilton Sundstrand propellers only and 
suggests that the figure for airplanes of U.S. registry should be 
changed from 251 to 115 airplanes.
    We agree to revise the estimated number of U.S. airplanes listed in 
the ``Cost Impact'' paragraph of the final rule. However, we do not 
agree that the number of airplanes be changed to 115 airplanes of U.S. 
registry. The total number of airplanes on the U.S. registry is 190 
airplanes (128 airplanes in service and 62 airplanes out of service). 
We must include out of service airplanes in our estimate, as we do not 
know when the airplanes may be put back in service. Therefore, we have 
revised the estimated number of U.S. airplanes in the ``Cost Impact'' 
paragraph of the final rule to 190 airplanes of U.S. registry and have 
revised the cost impact figures.

Conclusion

    After careful review of the available data, including the comments 
noted above, the FAA has determined that air safety and the public 
interest require the adoption of the rule with the changes described 
previously. The FAA has determined that these changes will neither 
increase the economic burden on any operator nor increase the scope of 
the AD.

Changes to 14 CFR Part 39/Effect on the AD

    On July 10, 2002, the FAA issued a new version of 14 CFR part 39 
(67 FR 47997, July 22, 2002), which governs the FAA's airworthiness 
directives system. The regulation now includes material that relates to 
altered products, special flight permits, and alternative methods of 
compliance. However, for clarity and consistency in this final rule, we 
have retained the language of the NPRM regarding that material.

Change in Labor Rate

    The FAA has recently reviewed the figures it has used over the past 
several years in calculating the economic impact of AD activity. In 
order to account for various inflationary costs in the airline 
industry, the FAA has determined that it is necessary to increase the 
labor rate used in these calculations from $60 per work hour to $65 per 
work hour. The cost impact information, below, has been revised to 
reflect this increase in the specified hourly labor rate.

Cost Impact

    The FAA estimates that 190 airplanes of U.S. registry will be 
affected by this AD, that it will take approximately 1 work hour per 
airplane to accomplish the required actions, and that the average labor 
rate is $65 per work hour. Based on these figures, the cost impact of 
the AD on U.S. operators is estimated to be $12,350, or $65 per 
airplane.
    The cost impact figure discussed above is based on assumptions that 
no operator has yet accomplished any of the requirements of this AD 
action, and that no operator would accomplish

[[Page 26003]]

those actions in the future if this AD were not adopted. The cost 
impact figures discussed in AD rulemaking actions represent only the 
time necessary to perform the specific actions actually required by the 
AD. These figures typically do not include incidental costs, such as 
the time required to gain access and close up, planning time, or time 
necessitated by other administrative actions.

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.
    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

0
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

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. Section 39.13 is amended by adding the following new airworthiness 
directive:

2004-09-39 Saab Aircraft AB: Amendment 39-13630. Docket 2002-NM-200-
AD.

    Applicability: Model SAAB 340B series airplanes equipped with 
Hamilton Sundstrand propellers, certificated in any category.

    Note 1: This AD applies to each airplane identified in the 
preceding applicability provision, regardless of whether it has been 
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 erroneous tripping of the remote controlled circuit 
breakers (RCCB) (even though an overload condition does not exist), 
premature failure of the RCCBs, loss of power to the feather pump 
system, and consequent reduced controllability of the airplane; 
accomplish the following:

Inspection and Replacement, If Necessary

    (a) Within 6 months after the effective date of this AD, perform 
a one-time inspection of RCCB 29KFC located in electrical 
compartment 407VU, and RCCB 30KFC located in electrical compartment 
408VU, to identify the part number (P/N), per the Accomplishment 
Instructions of Saab Service Bulletin 340-61-038, dated January 30, 
2002.
    (1) If both RCCBs are identified as P/N M83383-01-09, no further 
action is required by this paragraph.
    (2) If any RCCB is identified as P/N M83383-02-07, prior to 
further flight, replace the RCCB with an RCCB having P/N M83383-01-
09, per the service bulletin.

Part Installation

    (b) As of the effective date of this AD, no person shall install 
P/N M83383-02-07 at RCCB 29KFC in electrical compartment 407VU, or 
RCCB 30KFC in electrical compartment 408VU, on any airplane equipped 
with Hamilton Sundstrand propellers.

Alternative Methods of Compliance

    (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, International Branch, ANM-116, 
Transport Airplane Directorate, FAA. Operators shall submit their 
requests through an appropriate FAA Principal Maintenance Inspector, 
who may add comments and then send it to the Manager, International 
Branch, ANM-116.

    Note 2: Information concerning the existence of approved 
alternative methods of compliance with this AD, if any, may be 
obtained from the International Branch, ANM-116.

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 actions shall be done in accordance with Saab Service 
Bulletin 340-61-038, dated January 30, 2002. 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 Saab Aircraft AB, SAAB Aircraft Product Support, S-
581.88, Link[ouml]ping, Sweden. Copies may be inspected at the FAA, 
Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, 
Washington; or at the National Archives and Records Administration 
(NARA). For information on the availability of this material at 
NARA, call (202) 741-6030, or go to: <a href="http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html">http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html</a>.

    Note 3: The subject of this AD is addressed in Swedish 
airworthiness directive 1-172, dated January 31, 2002.

Effective Date

    (f) This amendment becomes effective on June 15, 2004.

    Issued in Renton, Washington, on April 29, 2004.
Kevin M. Mullin,
Acting Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 04-10372 Filed 5-10-04; 8:45 am]
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