AD 2000-14-06 Airworthiness Directives; Boeing Model 747 Series Airplanes

Models named: 747 series. Read the applicability below — it usually turns on serial or part numbers too.

Model 747 series airplanes, line numbers 1 through 1006 inclusive, 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 (h)(1) 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.

Required as indicated, unless accomplished previously. To prevent high fuel pressure in components between the fuel shutoff spar valve and the engine fuel shutoff valve, which could result in failure of the fuel system components, lead to fuel leakage, and, consequently, lead to a possible engine fire, accomplish the following: Restatement of Actions Required By AD 98-21-29, Amendment 39-10837: One-Time Inspection (a) For airplanes having line numbers 629 through 1006 inclusive and powered by General Electric or Rolls-Royce engines: Within 18 months after November 20, 1998 (the effective date of AD 98-21-29, amendment 39-10837), perform a one-time inspection to determine the part number of the fuel shutoff spar valve for the left-and right-hand outboard engines, in accordance with Boeing Alert Service Bulletin 747-28A2199, dated August 1, 1996; Boeing Service Bulletin 747-28A2199, Revision 1, dated October 1, 1998; or Boeing Service Bulletin 747-28A2199, Revision 2, dated July 8, 1999. Replacement (1) If a valve having part number (P/N) S343T003-40 (ITT P/N 125334D-1) is installed, no further action is required by this AD. (2) If a valve having P/N S343T003-40 (ITT P/N 125334D-1) is not installed, prior to further flight, accomplish either paragraph (a)(2)(i) or (a)(2)(ii) of this AD. (i) Replace the valve with a new valve, in accordance with the service bulletin. Prior to further flight following accomplishment of the replacement, align the valve(s), perform a check to detect leaks, and correct any discrepancy, in accordance with the service bulletin. Or (ii) Modify the valve body assembly of the fuel system in accordance with ITT Service Bulletin SB125120-28-01, ITT Service Bulletin SB107970-28-01, and ITT Service Bulletin SB125334-28-01; all dated July 15, 1996. Inspection (b) For airplanes having line numbers 629 through 1006 inclusive and powered by General Electric or Rolls-Royce engines: Except as provided in paragraph (c) of this AD, prior to further flight following accomplishment of paragraph (a)(2) of this AD, perform a one-time general visual inspection to detect fuel leaks of the components between the fuel shutoff spar valve and the engine fuel shutoff valve on all four engines, in accordance with the applicable section that pertains to Rolls-Royce RB211 series engines or General Electric CF6-80C and CF6-45/50 series engines in Chapter 71 of the Boeing 747 Airplane Maintenance Manual (AMM), or Boeing Service Bulletin 747-28A2199, Revision 2, dated July 8, 1999. If any leak is detected, prior to further flight, replace the part with a serviceable part. No further action is required by this AD. Note 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 under normally available lighting conditions such as daylight, hangar lighting, flashlight, or drop-light, 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.” (c) For airplanes having line numbers 629 through 1006 inclusive, powered by General Electric or Rolls-Royce engines, and having maintenance records that positively demonstrate that the inboard engines have never been located in the outboard position: Prior to further flight following accomplishment of paragraph (a)(2) of this AD, perform a one-time general visual inspection to detect fuel leaks of the components between the fuel shutoff spar valve and the engine fuel shutoff valve on the outboard engines only, in accordance with the applicable section that pertains to Rolls-Royce RB211 series engines or General Electric CF6-80C and CF6-45/50 series engines in Chapter 71 of the Boeing 747 AMM, or Boeing Service Bulletin 747-28A2199, Revision 2, dated July 8, 1999. If any leak is detected, prior to further flight, replace the part with a serviceable part. No further action is required by this AD. Note 3: Accomplishment of the actions specified in AMM 71-00-00/501, Test No. 2, “Fuel and Oil Leak Check,” for Rolls-Royce RB211 series engines, and AMM 71-00-00/501, Test No. 3, “Ground Test—Idle Leak Check ( or Idle Power),” for General Electric CF6-80C and CF6-45/50 series engines, is acceptable for compliance with the actions specified by paragraphs (b) and (c) of this AD. New Actions Required By This AD: Inspection (d) For airplanes having line numbers 1 through 628 inclusive: Within 18 months after the effective date of this AD, perform a one-time inspection of the maintenance records of the airplane to determine if the fuel shutoff spar valve for the left-and right-hand outboard engines has ever been replaced, in accordance with Boeing Service Bulletin 747-28A2199, Revision 2, dated July 8, 1999. (1) If the maintenance record inspection establishes that neither valve has been replaced, no further action is required by this AD. (2) If either valve has been replaced, or if the maintenance record inspection does not clearly establish that neither valve has been replaced, prior to further flight, accomplish paragraph (e)(1), (e)(2), or (e)(3), as applicable. (e) For airplanes having line numbers 629 through 1006 inclusive and powered by Pratt & Whitney engines, or for airplanes having line numbers 1 through 628 inclusive on which a fuel shutoff spar valve has been, or may have been, replaced: Within 18 months after the effective date of this AD, perform a one-time inspection to determine the part number of the fuel shutoff spar valve for the left-and right-hand outboard engines, as applicable, in accordance with Boeing Alert Service Bulletin 747-28A2199, dated August 1, 1996; Boeing Service Bulletin 747-28A2199, Revision 1, dated October 1, 1998; or Boeing Service Bulletin 747-28A2199, Revision 2, dated July 8, 1999. Replacement (1) If a valve having P/N S343T003-40 (ITT P/N 125334D-1) is installed, no further action is required by this AD. (2) If a valve having P/N 60B92406-161 (ITT P/N 125334-1), P/N 60B92406-81 (ITT P/N 125120-1), or P/N 60B92406-201 (ITT P/N 107970-1) is installed, accomplish either paragraph (f) or (g) of this AD, as applicable. (3) If a valve having P/N S343T003-40 (ITT P/N 125334D-1), P/N 60B92406-161 (ITT P/N 125334-1), P/N 60B92406-81 (ITT P/N 125120-1), or P/N 60B92406-201 (ITT P/N 107970-1) is not installed, prior to further flight, accomplish either paragraph (e)(3)(i) or (e)(3)(ii), and either paragraph (f) or (g) of this AD, as applicable. (i) Replace the valve with a new valve, in accordance with the service bulletin. Prior to further flight following accomplishment of the replacement, align the valve(s), perform a check to detect leaks, and correct any discrepancy, in accordance with the service bulletin. Or (ii) Modify the valve body assembly of the fuel system in accordance with ITT Service Bulletin SB125120-28-01, ITT Service Bulletin SB107970-28-01, and ITT Service Bulletin SB125334-28-01; all dated July 15, 1996. Inspection (f) Expect as provided in paragraph (g) of this AD, prior to further flight following accomplishment of paragraph (e) of this AD, perform a one-time general visual inspection to detect fuel leaks of the components between the fuel shutoff spar valve and the engine fuel shutoff valve on all four engines, in accordance with Boeing Service Bulletin 747-28A2199, Revision 2, dated July 8, 1999. If any leak is detected, prior to further flight, replace the part with a serviceable part. (g) For airplanes having maintenance records that positively demonstrate that the inboard engines have never been located in the outboard position: Prior to further flight following accomplishment of paragraph (e) of this AD, perform a one-time general visual inspection to detect fuel leaks of the components between the fuel shutoff spar valve and the engine fuel shutoff valve on the outboard engines only, in accordance with Boeing Service Bulletin 747-28A2199, Revision 2, dated July 8, 1999. If any leak is detected, prior to further flight, replace the part with a serviceable part. Note 4: Accomplishment of the actions specified in AMM 71-00-00/501, Test No. 2, “Fuel and Oil Leak Check,” for Rolls-Royce RB211 series engines, and AMM 71-00-00/501, Test No. 3, “Ground Test—Idle Leak Check (or Idle Power),” for General Electric CF6-80C and CF6-45/50 series engines, is acceptable for compliance with the actions specified by paragraphs (f) and (g) of this AD. Alternative Methods of Compliance (h)(1) 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, Seattle Aircraft Certification Office (ACO), FAA, Transport Airplane Directorate. Operators shall submit their requests through an appropriate FAA Principal Maintenance Inspector, who may add comments and then send it to the Manager, Seattle ACO. (2) Alternative methods of compliance, approved previously in accordance with AD 98-21-29, amendment 39-10837, are approved as alternative methods of compliance with paragraph (a), (a)(1), (a)(2), (a)(2)(i), (b), and (c) of this AD. Note 5: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Seattle ACO. Special Flight Permits (i) 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 (j) Except as provided by paragraphs (b) and (c) of this AD, the actions shall be done in accordance with Boeing Alert Service Bulletin 747-28A2199, dated August 1, 1996; Boeing Service Bulletin 747-28A2199, Revision 1, dated October 1, 1998; Boeing Service Bulletin 747-28A2199, Revision 2, dated July 8, 1999; ITT Service Bulletin SB125120-28-01, dated July 15, 1996; ITT Service Bulletin SB107970-28-01, dated July 15, 1996; or ITT Service Bulletin SB125334-28-01, dated July 15, 1996; as applicable. (1) The incorporation by reference of Boeing Service Bulletin 747-28A2199, Revision 1, dated October 1, 1998; and Boeing Service Bulletin 747-28A2199, Revision 2, dated July 8, 1999; is approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. (2) The incorporation by reference of Boeing Alert Service Bulletin 747-28A2199, dated August 1, 1996; ITT Service Bulletin SB125120-28-01, dated July 15, 1996; ITT Service Bulletin SB107970-28-01, dated July 15, 1996; and ITT Service Bulletin SB125334-28-01, dated July 15, 1996; was approved previously by the Director of the Federal Register as of November 20, 1998 (63 FR 55517, October 16, 1998). (3) Copies may be obtained from Boeing Commercial Airplane Group, P.O. Box 3707, Seattle, Washington 98124-2207; or ITT Aerospace Controls, 28150 Industry Drive, Valencia, California 91355. Copies may be inspected at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington; or at the Office of the Federal Register, 800 North Capitol Street, NW., suite 700, Washington, DC. Effective Date (k) This amendment becomes effective on August 17, 2000. Issued in Renton, Washington, on July 3, 2000. Vi L. Lipki, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 00-17297 Filed 7-12-00; 8:45 am] BILLING CODE 4910-13-U