Federal Register: August 28, 2000 (Volume 65, Number 167)
DOCID: FR Doc 00-21871
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
CFR Citation: 14 CFR Part 39
Docket ID: [Docket No. 99-SW-66-AD; Amendment 39-11882; AD 2000-17-08]
RIN ID: RIN 2120-AA64
ACTION: Airworthiness directives:
DOCUMENT ACTION: Final rule.
Airworthiness Directives; Eurocopter Deutschland GMBH Model BO- 105A, BO-105C, BO-105 C-2, BO-105 CB-2, BO-105 CB-4, BO-105S, BO-105 CS-2, BO-105 CBS-2, BO-105 CBS-4, and BO-105LS A-1 Helicopters
EFFECTIVE DATES: October 2, 2000.
This amendment supersedes an existing airworthiness directive (AD) that applies to Eurocopter Deutschland
GMBH (ECD) Model BO105A, BO105C, BO105 C2, BO105 CB2, BO105 CB 4, BO105S, BO105 CS2, BO105 CBS2, BO105 CBS4, and BO105LS A1 helicopters. That AD requires creating a component log card or equivalent record and determining the calendar age and number of flights on each tensiontorsion (TT) strap. That AD also requires inspecting and removing, as necessary, certain unairworthy TT straps. This amendment establishes a life limit for certain main rotor TT straps. This amendment is prompted by a need to establish a life limit for certain TT straps because of an accident in which a main rotor blade (blade) separated from an ECD Model MBBBK 117 helicopter due to fatigue failure of a TT strap. The same partnumbered TT strap is used on the ECD Model BO105 helicopters. The actions specified by this AD are intended to prevent fatigue failure of the TT strap, loss of a blade, and subsequent loss of control of the helicopter.
Eurocopter Deutschland GMBH,
A proposal to amend part 39 of the Federal Aviation Regulations (14 CFR part 39) by superseding AD 991922, which applies to ECD Model BO105A, BO105C, BO105 C2, BO105 CB2, BO105 CB4, BO105S, BO105 CS2, BO105 CBS2, BO105 CBS4, and BO105LS A 1 helicopters, was published in the Federal Register on April 24, 2000 (65 FR 21673). That action proposed to require establishing a life limit for the TT straps of 120 months or 40,000 flights, whichever occurs first.
Interested persons have been afforded an opportunity to participate in the making of this amendment. No comments were received on the proposal or the FAA's determination of the cost to the public. The FAA has determined that air safety and the public interest require the adoption of the rule as proposed.
The FAA estimates that 200 helicopters of U.S. registry will be affected by this AD, that it will take approximately 16 work hours per helicopter to accomplish the required actions, and that the average labor rate is $60 per work hour. Required parts will cost approximately $10,400 per helicopter. Based on these figures, the total cost impact of this AD on U.S. operators is estimated to be $2,272,200.
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 FAA, Office of the Regional Counsel, Southwest Region, 2601 Meacham Blvd., Room 663, Fort Worth, Texas. List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, 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 39AIRWORTHINESS 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 3911357 (64 FR
54770, October 8, 1999), and by adding a new airworthiness directive (AD), Amendment 3911882, to read as follows:
20001708 Eurocopter Deutschland GMBH: Amendment 3911882. Docket No. 99SW66AD. Supersedes AD 991922, Amendment 3911357, Docket No. 99SW52AD.
Applicability: Model BO105A, BO105C, BO105 C2, BO105 CB2, BO105 CB4, BO105S, BO105 CS2, BO105 CBS2, BO105 CBS4, and
BO105LS A1 helicopters, with part number (P/N) 2604067 (Bendix) or J173221 (Lord) rotor tensiontorsion (TT) strap, installed, certificated in any category.
Note 1: This AD applies to each helicopter 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 helicopters 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 (d) 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 fatigue failure of a TT strap, loss of a main rotor
blade (blade), and subsequent loss of control of the helicopter, accomplish the following:
(a) Before further flight,
(1) Create a component log card or equivalent record for each TT strap.
(2) Review the history of the helicopter and each TT strap. Determine the age since initial installation on any helicopter (age) and the number of flights on each TT strap. Enter both the age and the number of flights for each TT strap on the component log card or equivalent record. When the number of flights is unknown, multiply the number of hours timeinservice (TIS) by 5 to determine the number of flights. If a TT strap has been previously used at any time on Model BO105LS A3 ``SUPER LIFTER'', BO105 CB5, BO105 CBS5, BO105 DBS5, or any MBBBK 117 series helicopter, multiply the number of flights accumulated on those other models by a factor of 1.6 and then add that result to the number of flights accumulated on the helicopters affected by this AD.
(3) Remove any TT strap from service if the total hours TIS or number of flights and age cannot be determined.
(b) On or before January 1, 2001, remove any TT strap that has been in service 120 months since initial installation on any helicopter or accumulated 40,000 flights (a flight is a takeoff and a landing), on any helicopter. Replace the TT strap with an airworthy TT strap.
(c) This AD revises the Airworthiness Limitations Section of the maintenance manual by establishing a life limit for the TT strap, P/ N 2604067 and J173221, of 120 months or 40,000 flights, whichever occurs first.
(d) 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, Regulations Group, Rotorcraft Directorate, FAA. Operators shall submit their requests through an FAA Principal Maintenance Inspector, who may concur or comment and then send it to the Manager, Regulations Group.
Note 2: Information concerning the existence of approved
alternative methods of compliance with this AD, if any, may be obtained from the Regulations Group.
(e) 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 helicopter to a location where the requirements of this AD can be accomplished.
(f) This amendment becomes effective on October 2, 2000.
Note 3: The subject of this AD is addressed in the Luftfahrt Bundesamt (Federal Republic of Germany) AD 1999300/3, dated August 31, 1999.
Issued in Fort Worth, Texas, on August 21, 2000. Eric Bries,
Acting Manager, Rotorcraft Directorate, Aircraft Certification Service. [FR Doc. 0021871 Filed 82500; 8:45 am] BILLING CODE 491013P
FOR FURTHER INFORMATION CONTACT
Charles Harrison, Aviation Safety Engineer, FAA, Rotorcraft Directorate, Rotorcraft Standards Staff, Fort Worth, Texas 761930110, telephone (817) 2225128, fax (817) 2225961.