Airworthiness Directive · Amendment 39-19422 · Fuel
The Boeing Company Airplanes
This AD applies to all The Boeing Company airplanes, certificated in any category, identified in paragraphs (c)(1) and (c)(2) of this AD.
(1) Model 707-100 long body, -200, -100B long body, -100B short body, -300, -300B, -300C, and -400 series airplanes.
(2) Model 720 and 720B series airplanes.
We are adopting a new airworthiness directive (AD) for all The Boeing Company Model 707 airplanes, and Model 720 and 720B series airplanes. This AD was prompted by fuel system reviews conducted by the manufacturer. This AD requires revising the maintenance or inspection program to include new airworthiness limitations. We are issuing this AD to address the unsafe condition on these products.
Within 60 days after the effective date of this AD, revise the maintenance or inspection program, as applicable, to incorporate the information in Section A, including Subsections A.1, A.2, and Appendix A, as specified in Boeing 707/720 Airworthiness Limitations (AWLs), D6-7552-AWL, dated October 2016; except as provided in paragraph (h) of this AD. The initial compliance times for the AWL tasks are within the applicable compliance times specified in paragraphs (g)(1) through (g)(5) of this AD.
(1) AWL No. 28-AWL-01, External Wires Over Center Fuel Tank, as specified in Boeing 707/720 Airworthiness Limitations (AWLs), D6-7552-AWL, dated October 2016. The initial compliance time for accomplishment of the actions specified by AWL No. 28-AWL-01 is specified in paragraph (g)(1)(i) or (g)(1)(ii) of this AD, as applicable.
(i) For airplanes that have been previously inspected as specified in 28-AWL-01 as of the effective date of this AD: Conduct the inspection within 120 months after the most recent inspection.
(ii) For airplanes that have not been inspected as specified in 28-AWL-01 as of the effective date of this AD: Conduct the inspection within 12 months after the effective date of this AD.
(2) AWL No. 28-AWL-18, AC Fuel Boost Pump Bonding Installation, as specified in Boeing 707/720 Airworthiness Limitations (AWLs), D6-7552-AWL, dated October 2016. The initial compliance time for accomplishment of the actions specified by AWL No. 28-AWL-18 is specified in paragraph (g)(2)(i) or (g)(2)(ii) of this AD, as applicable.
(i) For airplanes that have been previously inspected as specified in 28-AWL-18 as of the effective date of this AD: Conduct the inspection within 72 months after the most recent inspection.
(ii) For airplanes that have not been inspected as specified in 28-AWL-18 as of the effective date of this AD: Conduct the inspection within 12 months after the effective date of this AD.
(3) AWL No. 28-AWL-19, Fuel Valve Bonding Jumper Installation—Engine Fuel Shutoff, Defuel, Reserve Tank Transfer, Fuel Dump, and Fuel Manifold Valves, as specified in Boeing 707/720 Airworthiness Limitations (AWLs), D6-7552-AWL, dated October 2016. The initial compliance time for accomplishment of the actions specified by AWL No. 28-AWL-19 is specified in paragraph (g)(3)(i) or (g)(3)(ii) of this AD, as applicable.
(i) For airplanes that have been previously inspected as specified in 28-AWL-19 as of the effective date of this AD: Conduct the inspection within 72 months after the most recent inspection.
(ii) For airplanes that have not been inspected as specified in 28-AWL-19 as of the effective date of this AD: Conduct the inspection within 12 months after the effective date of this AD.
(4) AWL No. 28-AWL-21, Dry Bay Fuel Manifold Assembly—Bonding Jumper Installation, as specified in Boeing 707/720 Airworthiness Limitations (AWLs), D6-7552-AWL, dated October 2016. The initial compliance time for accomplishment of the actions specified by AWL No. 28-AWL-21 is specified in paragraph (g)(4)(i) or (g)(4)(ii) of this AD, as applicable.
(i) For airplanes that have been previously inspected as specified in 28-AWL-21 as of the effective date of this AD: Conduct the inspection within 72 months after the most recent inspection.
(ii) For airplanes that have not been inspected as specified in 28-AWL-21 as of the effective date of this AD: Conduct the inspection within 12 months after the effective date of this AD.
(5) AWL No. 28-AWL-23, Reserve Tank Transfer Piping Assembly—Bonding Jumper Installation, as specified in Boeing 707/720 Airworthiness Limitations (AWLs), D6-7552-AWL, dated October 2016. The initial compliance time for accomplishment of the actions specified by AWL No. 28-AWL-23 is specified in paragraph (g)(5)(i) or (g)(5)(ii) of this AD, as applicable.
(i) For airplanes that have been previously inspected as specified in 28-AWL-23 as of the effective date of this AD: Conduct the inspection within 72 months after the most recent inspection.
(ii) For airplanes that have not been inspected as specified in 28-AWL-23 as of the effective date of this AD: Conduct the inspection within 12 months after the effective date of this AD.
As an option, when accomplishing the actions required by paragraph (g) of this AD, the changes specified in paragraphs (h)(1) and (h)(2) of this AD are acceptable.
(1) Where AWL No. 28-AWL-03 identifies wire types BMS 13-48, BMS 13-58, and BMS 13-60, the following wire types are acceptable: MIL-W-22759/16, SAE AS22759/16 (M22759/16), MIL-W-22759/32, SAE AS22759/32 (M22759/32), MIL-W-22759/34, SAE AS22759/34 (M22759/34), MIL-W-22759/41, SAE AS22759/41 (M22759/41), MIL-W-22759/86, SAE AS22759/86 (M22759/86), MIL-W-22759/87, SAE AS22759/87 (M22759/87), MIL-W-22759/92 and SAE AS22759/92 (M22759/92); and MIL-C-27500 and NEMA WC 27500 cables constructed from these military or SAE specification wire types identified above.
(2) Where AWL No. 28-AWL-03 identifies TFE-2X Standard wall for wire sleeving, the following sleeving materials are acceptable: Roundit 2000NX and Varglas Type HO, HP, or HM.
Except as provided in paragraph (h) of this AD, after the maintenance or inspection program has been revised as required by paragraph (g) of this AD, no alternative actions (e.g., inspections) or intervals may be used unless the actions or intervals are approved as an alternative method of compliance (AMOC) in accordance with the procedures specified in paragraph (k) of this AD.
(1) Accomplishment of the actions required by paragraph (g) of this AD terminates all requirements of AD 2008-04-11 R1.
(2) Accomplishment of the actions required by paragraph (g) of this AD terminates the requirements of paragraph (h) of AD 2013-24-07.
