AD 2005-08-08

The FAA is superseding an existing airworthiness directive (AD), which applies to certain McDonnell Douglas series airplanes. That AD currently requires repetitive inspections of the electrical connectors of the explosive cartridge wiring of the engine fire extinguisher containers to verify if the identification number labels are installed and legible; repetitive electrical tests of all explosive cartridge wiring of the engine fire extinguisher containers to verify proper installation and function; and corrective actions if necessary. This new AD requires an inspection of the emergency shut off wire assembly; installation of lanyards on the electrical connectors for the engine fire extinguishing agent containers and for the auxiliary power unit fire extinguishing agent containers if applicable; and related investigative/corrective actions, as applicable. This AD is prompted by reports of cross-wired electrical connectors of the engine fire extinguishing agent containers. We are issuing this AD to detect and correct cross-wired electrical connectors of the fire extinguishing system, which could release fire extinguishing agent into the incorrect engine nacelle in the event of an engine fire.

Final rule.

2005-08-08 McDonnell Douglas: Amendment 39-14060. Docket No. FAA- 2005-20135; Directorate Identifier 2003-NM-231-AD. \n\nEffective Date \n\n\t(a) This AD becomes effective May 26, 2005. \n\nAffected ADs \n\n\t(b) This AD supersedes AD 2001-25-01, amendment 39-12553 (66 FR 63157, December 5, 2001). \n\nApplicability \n\n\t(c) This AD applies to McDonnell Douglas Model DC-8-33, DC-8-43, DC-8-51, DC-8-52, DC-8-53, DC-8F-54, DC-8-55, DC-8F-55, DC-8-61, DC- 8-61F, DC-8-62, DC-8-62F, DC-8-63, DC-8-63F, DC-8-71, DC-8-71F, DC- 8-72, DC-8-72F, DC-8-73, and DC-8-73F airplanes; certificated in any category; as identified in Boeing Service Bulletin DC8-26-047, Revision 1, dated September 4, 2003. \n\nUnsafe Condition \n\n\t(d) This AD was prompted by reports of cross-wired electrical connectors of the engine fire extinguishing agent containers. We are issuing this AD to detect and correct cross-wired electrical connectors of the fire extinguishing system, which could release fire extinguishing agent into the incorrect engine nacelle in the event of an engine fire. \n\nCompliance \n\n\t(e) You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done. \n\nRestatement of Requirements of AD 2001-25-01 \n\nRepetitive Inspections and Tests, and Corrective Action(s), if Necessary \n\n\t(f) Within 30 days after December 20, 2001 (the effective date of AD 2001-25-01, amendment 39-12553), do the action(s) specified in paragraphs (f)(1) and (f)(2) of this AD, in accordance with Boeing Alert Service Bulletin DC8-26A046, dated November 7, 2001. \n\n\t(1) Do an inspection of the electrical connectors of the explosive cartridge wiring of the engine fire extinguisher containers to verify if the identification number labels are installed and legible. If any identification number label is missing or is not legible, before further flight, install a label or replace the label with a new label, as applicable. Repeat the inspection after each maintenance action for the Firex Discharge system. \n\n\t(2) Do an electrical test of all explosive cartridge wiring of the engine fire extinguisher containers to verify proper installation and function, using the cockpit warning lamps. If the lamp fails to illuminate, before further flight, troubleshoot and repair the wiring of the Firex Discharge system. Repeat the test after each maintenance action for the Firex Discharge system. \n\n\tNote 1: Inspections, tests, and corrective actions, if necessary, done per Boeing BOECOM M-7200-01-02632, dated November 5, 2001, before December 20, 2001 (the effective date of AD 2001-25-01, amendment 39-12553), are considered acceptable for compliance with the requirements of paragraph (f) of this AD. \n\nNew Requirements of This AD \n\nInspection and Installation \n\n\t(g) Within 18 months of the effective date of this AD, do a general visual inspection of the emergency shut off wire assembly to determine if the length ofwire harness AAG at P1-510 can be connected to R5-74 and to determine if the length of wire harness ABG at P1-511 can be connected to R5-73; and, before further flight, do the corrective action, as applicable; by accomplishing all of the actions specified in paragraph B.1.b. of the Accomplishment Instructions of Boeing Service Bulletin DC8-26-047, Revision 1, dated September 4, 2003. \n\n\tNote 2: For the purposes of this AD, a general visual inspection is defined as: "A visual examination of an interior or exterior area, installation, or assembly to detect obvious damage, failure, or irregularity. This level of inspection is made from within touching distance unless otherwise specified. A mirror may be necessary to enhance visual access to all exposed surfaces in the inspection area. This level of inspection is made under normally available lighting conditions such as daylight, hangar lighting, flashlight, or droplight and may require removal or opening of access panels or doors. Stands, ladders, or platforms may be required to gain proximity to the area being checked." \n\n\t(h) Within 18 months of the effective date of this AD, install lanyards on the electrical connectors for the engine fire extinguishing agent containers in the left and right wing front spar; and, before further flight, do all the related investigative/ corrective actions, as applicable; by accomplishing all of the actions specified in paragraph B.1.c. of the Accomplishment Instructions of Boeing Service Bulletin DC8-26-047, Revision 1, dated September 4, 2003. \n\nInstallation if Applicable \n\n\t(i) For airplanes equipped with an auxiliary power unit (APU) installation in the forward cargo compartment at station Y=640.000: Within 18 months of the effective date of this AD, install lanyards on the electrical connectors for the APU fire extinguishing agent containers; and, before further flight, do all the related investigative/corrective actions, as applicable; by accomplishing all of the actions specified in paragraph B.2. of the Accomplishment Instructions of Boeing Service Bulletin DC8-26-047, Revision 1, dated September 4, 2003. \n\nTerminating Action \n\n\t(j) Accomplishment of the actions specified in paragraphs (g) and (h) of this AD terminates the repetitive inspections and electrical tests required by paragraph (f) of this AD. \n\nCredit for Previous Service Bulletin \n\n\t(k) Actions done before the effective date of this AD in accordance with Boeing Service Bulletin DC8-26-047, dated April 2, 2003, are acceptable for compliance with the corresponding requirements in paragraphs (g), (h), and (i) of this AD. \n\nAlternative Methods of Compliance (AMOCs) \n\n\t(l) The Manager, Los Angeles Aircraft Certification Office, FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. \n\nMaterial Incorporated by Reference \n\n\t(m) You must use Boeing Service Bulletin DC8-26-047, Revision 1, dated September 4, 2003; and Boeing Alert Service Bulletin DC8- 26A046, dated November 7, 2001; as applicable; to perform the actions that are required by this AD, unless the AD specifies otherwise. \n\n\t(1) The incorporation by reference of Boeing Service Bulletin DC8-26-047, Revision 1, dated September 4, 2003, is approved by the Director of the Federal Register, in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. \n\n\t(2) The incorporation by reference of Boeing Alert Service Bulletin DC8-26A046, dated November 7, 2001, was approved previously by the Director of the Federal Register as of December 20, 2001 (66 FR 63157, December 5, 2001). \n\n\t(3) To get copies of the service information, contact Boeing Commercial Airplanes, Long Beach Division, 3855 Lakewood Boulevard, Long Beach, California 90846, Attention: Data and Service Management, Dept. C1-L5A (D800-0024. To view the AD docket, go to the Docket Management Facility, U.S. Department of Transportation, 400 Seventh Street SW., room PL-401, Nassif Building, Washington, DC. To review copies of the service information, go to the National Archives and Records Administration (NARA). For information on the availability of this material at the NARA, call (202) 741-6030, or go to http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html .

The FAA proposed to amend part 39 of the Federal Aviation Regulations (14 CFR part 39) with an AD to supersede AD 2001-25-01, amendment 39-12553 (66 FR 63157, December 5, 2001). The existing AD applies to certain McDonnell Douglas Model DC-8-33 and -43 airplanes; Model DC-8F-54 and DC-8F-55 airplanes; and Model DC-8-50, - 60, -60F, -70, and -70F series airplanes. The proposed AD was published in the Federal Register on January 28, 2005 (70 FR 4055), to continue to require repetitive inspections of the electrical connectors of the explosive cartridge wiring of the engine fire extinguisher containers to verify if the identification number labels are installed and legible; repetitive electrical tests of all explosive cartridge wiring of the engine fire extinguisher containers to verify proper installation and function; and corrective actions if necessary. That action also proposed to require an inspection of the emergency shut off wire assembly; installation oflanyards on the electrical connectors for the engine fire extinguishing agent containers and for the auxiliary power unit (APU) fire extinguishing agent containers if applicable; and related investigative/corrective actions, as applicable. \n\nComments \n\n\tWe provided the public the opportunity to participate in the development of this AD. No comments have been submitted on the proposed AD or on the determination of the cost to the public. \n\nConclusion \n\n\tWe have carefully reviewed the available data and determined that air safety and the public interest require adopting the AD as proposed. \n\nCosts of Compliance \n\n\tThere are about 233 airplanes of the affected design in the worldwide fleet. The following table provides the estimated costs, using an average labor rate of $65 per hour, for U.S. operators to comply with this AD. \n\n\tEstimated Costs\n\n\n\n\n\n\n\n\n\nAction \nWork hours \nParts \nCost per airplane \nNumber of \nU.S.-registered airplanes \nFleet costInspection of the electrical connectors of the explosive \ncartridge wiring and electrical test of all explosive cartridge wiring (required by AD 2001-25-01). \n3 \n$0 \n$195, per inspection/ \ntesting cycle. \n177 \n$34,515 \n\n\n\n\n\n\nGeneral visual inspection of the emergency shut off wire assembly (new action). \n1 \n$0 \n$65, per inspection \ncycle. \n177 \n11,505 \n\n\n\n\n\n\nInstallation of lanyards on electrical connectors for engine \nfire extinguishing agent containers (new action). \n4 \n$58 (For engine \nfirex). \n$318 \n177 \n56,268 \n\n\n\n\n\n\n\n\n\n\n\n\nInstallation of lanyards on electrical APU connectors for \nAPU fire extinguishing agent containers if applicable (new action). \n1 \n$52 (For APU firex) \n$117 \n177 \n20,709 \n\n\t\t\nAuthority for This Rulemaking \n\n\tTitle 49 of the United States Code specifies the FAA's authority to issue rules on aviation safety. Subtitle I, Section 106, describes the authority of the FAA Administrator. SubtitleVII, Aviation Programs, describes in more detail the scope of the Agency's authority. \n\n\tWe are issuing this rulemaking under the authority described in subtitle VII, part A, subpart III, section 44701, "General requirements." Under that section, Congress charges the FAA with promoting safe flight of civil aircraft in air commerce by prescribing regulations for practices, methods, and procedures the Administrator finds necessary for safety in air commerce. This regulation is within the scope of that authority because it addresses an unsafe condition that is likely to exist or develop on products identified in this rulemaking action. \n\nRegulatory Findings \n\n\tWe have determined that this AD will not have federalism implications under Executive Order 13132. This AD 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.For the reasons discussed above, I certify that this AD: \n\n\t(1) Is not a "significant regulatory action" under Executive Order 12866; \n\n\t(2) Is not a "significant rule" under DOT Regulatory Policies and Procedures (44 FR 11034, February 26, 1979); and \n\n\t(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. \n\n\tWe prepared a regulatory evaluation of the estimated costs to comply with this AD. See the ADDRESSES section for a location to examine the regulatory evaluation. \n\nList of Subjects in 14 CFR Part 39 \n\n\tAir transportation, Aircraft, Aviation safety, Incorporation by reference, Safety. \n\nAdoption of the Amendment \n\n\tAccordingly, under the authority delegated to me by the Administrator, the FAA amends 14 CFR part 39 as follows: \n\nPART 39--AIRWORTHINESS DIRECTIVES \n\n1. The authority citation for part 39 continues to read as follows: \n\n\tAuthority: 49U.S.C. 106(g), 40113, 44701. \n\nSec. 39.13 (Amended) \n\n2. The FAA amends Sec. 39.13 by removing amendment 39-12553 (66 FR 63157, December 5, 2001), and by adding the following new airworthiness directive (AD):