Airworthiness Directive · Amendment 39-19374 · Fuel
The Boeing Company Airplanes
This AD applies to The Boeing Company Model 727, 727C, 727-100, 727-100C, 727-200, and 727-200F series airplanes, certificated in any category, with an original certificate of airworthiness or original export certificate of airworthiness issued on or before the effective date of this AD.
We are adopting a new airworthiness directive (AD) for certain The Boeing Company Model 727 airplanes. This AD was prompted by significant changes made to the airworthiness limitations (AWLs) related to fuel tank ignition prevention. This AD requires revising the maintenance or inspection program, as applicable, to incorporate the latest revision of the AWLs. 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 all information in Section A, including Subsections A.1 and A.2, of Boeing 727-100/200 Airworthiness Limitations (AWLs) D6-8766-AWL, Revision December 2016. The initial compliance times for the airworthiness limitation instruction (ALI) items are within the applicable compliance times specified in paragraphs (g)(1) through (g)(6) of this AD.
(1) For AWL No. 28-AWL-01, “External Wires Over Center Fuel Tank (Tank No. 2)”: At the applicable time specified in paragraph (g)(1)(i) or (g)(1)(ii) of this AD.
(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) For AWL No. 28-AWL-16, “Over-Current and Arcing Protection Electrical Design Features Operation—Boost Pump Ground Fault Interrupter (GFI)”: At the applicable time specified in paragraph (g)(2)(i) or (g)(2)(ii) of this AD.
(i) For airplanes that have been previously inspected as specified in 28-AWL-16 as of the effective date of this AD: Conduct the inspection within 12 months after the most recent inspection.
(ii) For airplanes that have not been inspected as specified in 28-AWL-16 as of the effective date of this AD: Conduct the inspection within 90 days after the effective date of this AD.
(3) For AWL No. 28-AWL-17, “Auxiliary Tank Fuel Boost Pump Power Failed On Protection System”: At the applicable time specified in paragraph (g)(3)(i) or (g)(3)(ii) of this AD.
(i) For airplanes that have been previously inspected as specified in 28-AWL-17 as of the effective date of this AD: Conduct the inspection within 12 months after the most recent inspection.
(ii) For airplanes that have not been inspected as specified in 28-AWL-17 as of the effective date of this AD: Conduct the inspection within 90 days after the effective date of this AD.
(4) For AWL No. 28-AWL-18, “Fuel Quantity Indicating System (FQIS)—Out-Tank Wiring Lightning Shield to Ground Termination and Joint Resistance for the Volumetric Top-Off (VTO) Unit (If Installed)”: At the applicable time specified in paragraph (g)(4)(i) or (g)(4)(ii) of this AD.
(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 120 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.
(5) For AWL No. 28-AWL-22, “AC Fuel Boost Pump Bonding Installation”: At the applicable time specified in paragraph (g)(5)(i) or (g)(5)(ii) of this AD.
(i) For airplanes that have been previously inspected as specified in 28-AWL-22 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-22 as of the effective date of this AD: Conduct the inspection within 12 months after the effective date of this AD.
(6) For AWL No. 28-AWL-24, “Motor Operated Valve Bonding Jumper Installation—Fault Current Protection”: At the applicable time specified in paragraph (g)(6)(i) or (g)(6)(ii) of this AD.
(i) For airplanes that have been previously inspected as specified in 28-AWL-24 as of the effective date of this AD: Conduct the inspection within 60 months after the most recent inspection.
(ii) For airplanes that have not been inspected as specified in 28-AWL-24 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 can be made to AWL No. 28-AWL-03.
(1) Where AWL No. 28-AWL-03 identifies wire types BMS 13-48, BMS 13-58, and BMS 13-60, add the following acceptable wire types: 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, add the following acceptable sleeving materials: Roundit 2000NX and Varglas Type HO, HP, or HM.
After the maintenance or inspection program, as applicable, has been revised as required by paragraph (g) of this AD, no alternative actions (e.g., inspections), intervals, and CDCCLs may be used unless the actions, intervals, and CDCCLs are approved as an alternative method of compliance (AMOC), in accordance with the procedures specified in paragraph (k) of this AD.
Accomplishment of the maintenance or inspection program revision required by paragraph (g) of this AD terminates the actions specified in paragraphs (j)(1) through (j)(5) of this AD.
(1) The revision required by paragraph (g) of AD 2008-04-10 R1.
(2) The revision required by paragraph (h) of AD 2009-05-03.
(3) The revision required by paragraph (j) of AD 2011-12-05.
(4) The revision required by paragraph (h) of AD 2013-22-03.
(5) The revision required by paragraphs (n)(1) and (n)(2) of AD 2013-24-15.
