66544 Federal Register / Vol. 67, No. 212 / Friday, November 1, 2002 / Rules and Regulations Directorate, 901 Locust, Room 301, Kansas Limited (Pilatus Britten-Norman) BN–2, What Is the Potential Impact if FAA City, Missouri 64106; telephone: (816) 329– BN–2A, BN–2B, BN–2T, and BN2A MK. Took No Action? 4059; facsimile: (816) 329–4090. III series airplanes. This AD requires This condition, if not detected and (g) What if I need to fly the airplane to you to repetitively inspect the bottom another location to comply with this AD? The corrected, could result in failure of the FAA can issue a special flight permit under corner of the engine mount bracket for engine mount. Such failure could result §§ 21.197 and 21.199 of the Federal Aviation cracks and replace any cracked bracket in the engine separating from the Regulations (14 CFR 21.197 and 21.199) to with a new one. This AD is the result airplane and lead to loss of control of operate your airplane to a location where you of mandatory continuing airworthiness the airplane. can accomplish the requirements of this AD. information (MCAI) issued by the (h) Are any service bulletins incorporated airworthiness authority for the United Has FAA Taken Any Action to This into this AD by reference? Actions required Kingdom. The actions specified by this Point? by this AD must be done in accordance with AD are intended to detect and correct We issued a proposal to amend part Pilatus PC–7 Service Bulletin No. 57–004, cracks in the engine mount bracket. 39 of the Federal Aviation Regulations Revision No. 1, dated June 17, 2002; Pilatus PC–7 Service Bulletin No. 57–005, dated Such a condition could cause the engine (14 CFR part 39) to include an AD that September 10, 2001; and Pilatus PC–7 mount assembly to fail, which could would apply to all Pilatus Britten- Maintenance Manual, Temporary Revision result in the engine separating from the Norman BN–2, BN–2A, BN–2B, BN–2T, No. 05–10, dated September 10, 2001. The airplane and lead to loss of control of and BN2A MK. III series airplanes. This Director of the Federal Register approved this the airplane. proposal was published in the Federal incorporation by reference under 5 U.S.C. DATES: This AD becomes effective on Register as a notice of proposed 552(a) and 1 CFR part 51. You may get copies December 20, 2002. rulemaking (NPRM) on August 22, 2002 from Pilatus Aircraft Ltd., Customer Liaison (67 FR 54384). The NPRM proposed to Manager, CH–6371 Stans, Switzerland; The Director of the Federal Register require you to repetitively inspect the telephone: +41 41 619 63 19; facsimile: +41 approved the incorporation by reference bottom corner of the engine mount 41 619 6224; or from Pilatus Business of certain publications listed in the bracket for cracks, replace any cracked Aircraft Ltd., Product Support Department, regulations as of December 20, 2002. 11755 Airport Way, Broomfield, Colorado bracket, return the removed bracket(s) to 80021; telephone: (303) 465–9099; facsimile: ADDRESSES: You may get the service Pilatus Britten-Norman, and report the (303) 465–6040. You may view copies at the information referenced in this AD from return to FAA. FAA, Central Region, Office of the Regional B–N Group Limited, Bembridge, Isle of Are There Differences Between This AD, Counsel, 901 Locust, Room 506, Kansas City, Wight, United Kingdom PO35 5PR; the Service Information, and the CAA Missouri, or at the Office of the Federal telephone: +44 (0) 1983 872511; AD? Register, 800 North Capitol Street, NW, suite facsimile: +44 (0) 1983 873246. You 700, Washington, DC. may view this information at the The CAA AD and the service Note 3: The subject of this AD is addressed Federal Aviation Administration (FAA), information allow continued flight if in Swiss AD HB 2002–270, dated June 24, Central Region, Office of the Regional cracks are found in the engine mount 2002. Counsel, Attention: Rules Docket No. bracket that do not exceed certain (i) When does this amendment become 2002–CE–21–AD, 901 Locust, Room limits. The applicable service bulletin effective ? This amendment becomes effective 506, Kansas City, Missouri 64106; or at specifies replacement of the engine on December 20, 2002. the Office of the Federal Register, 800 mount bracket only if cracks are found Issued in Kansas City, Missouri, on North Capitol Street, NW., suite 700, exceeding this limit, as does CAA AD October 22, 2002. Washington, DC. 005–11–2001. This AD does not allow continued flight if any crack is found. David R. Showers, FOR FURTHER INFORMATION CONTACT: FAA policy is to disallow airplane Acting Manager, Small Airplane Directorate, Doug Rudolph, Aerospace Engineer, Aircraft Certification Service. operation when known cracks exist in FAA, Small Airplane Directorate, 901 primary structure, unless the ability to [FR Doc. 02–27418 Filed 10–31–02; 8:45 am] Locust, Room 301, Kansas City, sustain ultimate load with these cracks BILLING CODE 4910–13–P Missouri 64106; telephone: (816) 329– is proven. The engine mount bracket is 4059; facsimile: (816) 329–4090. considered primary structure, and the SUPPLEMENTARY INFORMATION: DEPARTMENT OF TRANSPORTATION FAA has not received any analysis to Discussion prove that ultimate load can be Federal Aviation Administration sustained with cracks in this area. What Events Have Caused This AD? Is There a Modification I Can 14 CFR Part 39 The Civil Aviation Authority (CAA), Incorporate Instead of Repetitively [Docket No. 2002–CE–21–AD; Amendment which is the airworthiness authority for Inspecting the Engine Mount Brackets? 39–12926; AD 2002–22–02] the United Kingdom, recently notified The FAA has determined that long- FAA that an unsafe condition may exist term continued operational safety will RIN 2120–AA64 on all Pilatus Britten-Norman BN–2, be better assured by design changes that BN–2A, BN–2B, BN–2T, and BN2A remove the source of the problem rather Airworthiness Directives; Pilatus MK. III series airplanes. The CAA Britten-Norman Limited BN–2, BN–2A, than by performing repetitive reports two occurrences of extensive inspections. With this in mind, we will BN–2B, BN–2T, and BN2A MK. III cracks being found on the bottom corner Series Airplanes continue to work with Pilatus Britten- of the engine mount bracket between the Norman in collecting information to AGENCY: Federal Aviation attachment flange and the main bracket. determine whether a future design Administration, DOT. The cracks were found during regular change may be necessary. scheduled maintenance. ACTION: Final rule. The manufacturer has determined that Was the Public Invited To Comment? SUMMARY: This amendment adopts a this condition is a result of the The FAA encouraged interested new airworthiness directive (AD) that reinforcing doubler being too close to persons to participate in the making of applies to all Pilatus Britten-Norman the flange. this amendment. We did not receive any VerDate 0ct<09>2002 13:19 Oct 31, 2002 Jkt 200001 PO 00000 Frm 00018 Fmt 4700 Sfmt 4700 E:\FR\FM\01NOR1.SGM 01NOR1 Federal Register / Vol. 67, No. 212 / Friday, November 1, 2002 / Rules and Regulations 66545 comments on the proposed rule or on corrections. We have determined that Cost Impact our determination of the cost to the these minor corrections: How Many Airplanes Does This AD public. —Provide the intent that was proposed Impact? FAA’s Determination in the NPRM for correcting the unsafe We estimate that this AD affects 126 What is FAA’s Final Determination on condition; and airplanes in the U.S. registry. This Issue? —Do not add any additional burden What Is the Cost Impact of This AD on upon the public than was already Owners/Operators of the Affected After careful review of all available proposed in the NPRM. information related to the subject Airplanes? presented above, we have determined We estimate the following costs to that air safety and the public interest accomplish the inspection for BN–2, require the adoption of the rule as BN–2A, BN–2B, and BN2A MK. III proposed except for minor editorial series airplanes: Total cost per Labor cost Parts cost airplane 4 workhours × $60 per hour = $240 ........................................................................................................................ $10 $250 We estimate the following costs to accomplish the inspection for BN–2T series airplanes: Total cost per Labor cost Parts cost airplane 8 workhours × $60 per hour = $480 ........................................................................................................................ $10 $490 We estimate the following costs to series airplanes that will be required number of airplanes that may need such accomplish any necessary replacements based on the results of the inspection. replacement: for BN–2, BN–2A, BN–2B, and BN–2T We have no way of determining the Parts cost per Labor cost bracket Total cost per bracket 48 workhours × $60 per hour = $2,880 per bracket (2 brackets $1,295 $2,880 + $1,295 = $4,175. per engine, 2 engines per airplane). We estimate the following costs to will be required based on the results of determining the number of airplanes accomplish any necessary replacements the inspection. We have no way of that may need such replacement: for BN2A MK. III series airplanes that Parts cost per Labor cost bracket Total cost per bracket 48 workhours × $60 per hour = $2,880 per bracket (2 brackets $714 $2,880 + $714 = $3,594. per engine, 2 engines per airplane). What Is the Compliance Time of This time airplanes are inspected within a responsibilities among the various AD? certain amount of hours TIS and the levels of government. Therefore, it is The compliance time of this AD is lower time airplanes would be determined that this final rule does not ‘‘within the next 500 hours time-in- inspected at the next maintenance event have federalism implications under service (TIS) or within the next 24 in the affected area.