12910 Federal Register / Vol. 67, No. 54 / Wednesday, March 20, 2002 / Proposed Rules modified, altered, or repaired in the area The request should include an assessment of To prevent failure of the airstair door to subject to the requirements of this AD. For the effect of the modification, alteration, or open after a landing, which could result in airplanes that have been modified, altered, or repair on the unsafe condition addressed by a blocked escape route during an emergency repaired so that the performance of the this AD; and, if the unsafe condition has not evacuation, accomplish the following: requirements of this AD is affected, the been eliminated, the request should include owner/operator must request approval for an specific proposed actions to address it. Modifications alternative method of compliance in Compliance: Required as indicated, unless (a) Modify the airplane as specified by the accordance with paragraph (b) of this AD. accomplished previously. following table: TABLE—MODIFICATION REQUIREMENTS In accordance with the Accomplishment In- For Model— Modify the airstair door by— Within— structions of Bombardier Service Bulletin— (1) DHC–8–102, ¥103, ¥106, Replacing the inflation valve 6 months after the effective 8–52–46, dated September 30, 1998. ¥201, 202, 301, ¥311, and with a new valve of an im- date of this AD. ¥315 series airplanes; serial proved design (Modsum numbers 003 through 522 in- 8Q100185). clusive. (2) DHC–8–102, ¥103, ¥106, Reworking the airstair door 6 months after the effective 8–52–38, dated October 10, 1995; or ¥301, ¥311, and ¥315 se- cable balance assembly date of this AD. 8–52–38, Revision ‘A,’ dated September 19, ries airplanes; serial numbers (Modsum 8/2205). 1997. 003 through 400 inclusive. (3) DHC–8–102, ¥103, ¥106, Replacing the upper cable 6 months after the effective 8–52–57, dated February 23, 2000; or ¥201, ¥202, ¥301, 311, guards on the airstair door date of this AD, but after 8–52–58, Revision ‘A,’ dated July 28, 2000; and ¥315 series airplanes; with new, improved cable the modification required by or serial numbers 003 through guards (Modsum paragraph (a)(2) of this AD. 8–52–57, Revision ‘B,’ dated November 14, 550 inclusive. 8Q101093). 2000. (4) DHC–8–102, 103, 106, 201, (i) Manufacturing and install- 6 months after the effective 8–52–56, Revision ‘C,’ dated March 10, 202, 301, 311, and 315 se- ing a support bracket as- date of this AD. 2000; or ries airplanes; serial numbers sembly (Modsum 8–52–56, Revision ‘D,’ dated May 18, 2000; 003 through 550 inclusive. 8Q101086); and/or. or 8–52–56, Revision ‘E,’ dated July 20, 2000; or 8–52–56, Revision ‘F,’ dated August 29, 2000; or 8–52–56, Revision ‘G,’ dated November 7, 2000. (ii) Replacing the airstair door 6 months after the effective 8–52–59; dated September 18, 2000; or gas springs with new gas date of this AD. 8–52–59; Revision ‘A,’ dated January 3, springs (Modsum 2001. 8Q101074). Note 2: Modsum 8Q101093 (paragraph of the Federal Aviation Regulations (14 CFR DEPARTMENT OF TRANSPORTATION (a)(3) of this AD) cannot be accomplished 21.197 and 21.199) to operate the airplane to before Modification 8/2205 (paragraph (a)(2) a location where the requirements of this AD Federal Aviation Administration of this AD), because Modsum 8Q101093 can be accomplished. introduces a redesigned cable guard that Note 5: The subject of this AD is addressed 14 CFR Part 39 replaces a cable guard that is part of Modification 8/2205. in Canadian airworthiness directive CF– [Docket No. 2000–CE–14–AD] 2000–19R1, dated January 22, 2001. Note 3: Modification as specified by either RIN 2120–AA64 paragraph (a)(4)(i) or (a)(4)(ii)—or both—of Issued in Renton, Washington, on March this AD is acceptable for compliance with the 13, 2002. Airworthiness Directives; Rockwell requirements of paragraph (a)(4) of this AD. Ali Bahrami, Collins, Inc. ADC–85, ADC–85A, ADC– 850D, and ADC–850F Air Data Alternative Methods of Compliance Acting Manager, Transport Airplane Computers (b) An alternative method of compliance or Directorate, Aircraft Certification Service. adjustment of the compliance time that [FR Doc. 02–6630 Filed 3–19–02; 8:45 am] AGENCY: Federal Aviation provides an acceptable level of safety may be BILLING CODE 4910–13–P Administration, DOT. used if approved by the Manager, New York ACTION: Supplemental notice of Aircraft Certification Office (ACO), FAA. Operators shall submit their requests through proposed rulemaking (NPRM); an appropriate FAA Principal Maintenance Reopening of the comment period. Inspector, who may add comments and then SUMMARY: This document proposes to send it to the Manager, New York ACO. revise an earlier proposed airworthiness Note 4: Information concerning the directive (AD) that would apply to existence of approved alternative methods of compliance with this AD, if any, may be certain Rockwell Collins, Inc. obtained from the New York ACO. (Rockwell) ADC–85, ADC–85A, ADC– 850C, and ADC–850F air data Special Flight Permits computers that are installed on (c) Special flight permits may be issued in airplanes. The earlier NPRM would accordance with sections 21.197 and 21.199 have required you to replace any VerDate 11<MAY>2000 18:17 Mar 19, 2002 Jkt 197001 PO 00000 Frm 00013 Fmt 4702 Sfmt 4702 E:\FR\FM\20MRP1.SGM pfrm04 PsN: 20MRP1 Federal Register / Vol. 67, No. 54 / Wednesday, March 20, 2002 / Proposed Rules 12911 affected air data computer (ADC) with Regional Systems, 400 Collins Road the public that concerns the substantive one that has a reprogrammed and tested Northeast,Cedar Rapids, Iowa 52498; parts of this proposed AD. central processing unit (CPU) circuit telephone: (319) 295–2512; facsimile: How Can I Be Sure FAA Receives My card and circuit card assemblies. The (319) 295–5064. You may also view this Comment? earlier NPRM resulted from a flight test information at the Rules Docket at the that showed that these ADCs could address above. If you want FAA to acknowledge the display an unwarranted ADC flag in FOR FURTHER INFORMATION CONTACT: receipt of your mailed comments, you response to the airplane’s ‘‘Normal/ Roger A. Souter, FAA, Wichita Aircraft must include a self-addressed, stamped Alternate Air’’ static source selection Certification Office (ACO), 1801 Airport postcard. On the postcard, write capability. Revised service information Road, Rm 100, Wichita, Kansas 67209; ‘‘Comments to Docket No. 2000–CE–14– revealed the need to change the telephone: (316) 946–4134; facsimile: AD.’’ We will date stamp and mail the applicability of the affected ADC units (316) 946–4407; e-mail address: postcard back to you. that are installed on airplanes. In [email protected]. Discussion addition, evaluation of the public comments on the NPRM reveals the SUPPLEMENTARY INFORMATION: What Events Have Caused This need to change the number and models Comments Invited Proposed AD? of airplanes that could have the affected The air data computer (ADC), as part How Do I Comment on This Proposed ADC units installed. Since these actions of its monitoring process, tests for errant AD? impose an additional burden over that sensor behavior such as unreasonable proposed in the NPRM, we are The FAA invites comments on this jumps in altitude and unreasonably high reopening the comment period to allow proposed rule. You may submit vertical speed. When the ADC detects the public the chance to comment on whatever written data, views, or an errant sensor behavior, the ADC these additional actions. arguments you choose. You need to displays a flag for 5.5 seconds plus the DATES: The Federal Aviation include the rule’s docket number and time it takes for the sensor to settle Administration (FAA) must receive any submit your comments to the address within the limits for another 5.5-second comments on this proposed rule on or specified under the caption ADDRESSES. period. This results in a minimum ADC before May 17, 2002. We will consider all comments received flag display of 11 seconds. ADDRESSES: Submit comments to FAA, on or before the closing date. We may Testing of certain Rockwell Collins Central Region, Office of the Regional amend this proposed rule in light of ADCs reveals the ADC could display Counsel, Attention: Rules Docket No. comments received. Factual information unwarranted flags on aircraft where you 2000–CE–14–AD, 901 Locust, Room that supports your ideas and suggestions can select the ‘‘Normal/Alternate Air’’ 506, Kansas City, Missouri 64106. You is extremely helpful in evaluating the static source. When there is a significant may view any comments at this location effectiveness of this proposed AD action difference between normal and between 8 a.m. and 4 p.m., Monday and determining whether we need to alternate/revisionary static air sources, through Friday, except Federal holidays. take additional rulemaking action. you can exceed the ADC monitor You may also send comments thresholds and the ADC would display Are There Any Specific Portions of This electronically to the following address: flags. Proposed AD I Should Pay Attention to? 9–ACE–7–[email protected]. Comments If the flight crew used the undesirable sent electronically must contain The FAA specifically invites ADC flag displays to deselect the ‘‘Docket No. 2000–CE–76–AD’’ in the comments on the overall regulatory, alternate static air source before the subject line. If you send comments economic, environmental, and energy initial 11-second display period, a valid electronically as attached electronic aspects of this proposed rule that might air source may have been deselected. files, the files must be formatted in suggest a need to modify the rule.