Airworthiness directives › 2018-17-20
AD 2018-17-20 Airworthiness Directives; The Boeing Company Airplanes
Models named: 727, 727C, 727-100, 727-100C, 727-200, 727-200F series. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
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.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
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.
Unsafe condition
This AD was prompted by significant changes made to the airworthiness limitations (AWLs) related to fuel tank ignition prevention. We are issuing this AD to prevent the potential for ignition sources inside fuel tanks caused by latent failures, alterations, repairs, or maintenance actions, which, in combination with flammable fuel vapors, could result in fuel tank explosions and consequent loss of the airplane.
Affected ADs
This AD affects the ADs specified in paragraphs (b)(1) through (b)(5) of this AD. (1) AD 2008-04-10 R1, Amendment 39-16121 (74 FR 66227, December 15, 2009) (“AD 2008-04-10 R1”). (2) AD 2009-05-03, Amendment 39-15827 (74 FR 8851, February 27, 2009) (“AD 2009-05-03”). (3) AD 2011-12-05, Amendment 39-16712 (76 FR 33991, June 10, 2011) (“AD 2011-12-05”). (4) AD 2013-22-03, Amendment 39-17635 (78 FR 65193, October 31, 2013) (“AD 2013-22-03”). (5) AD 2013-24-15, Amendment 39-17692 (78 FR 72791, December 4, 2013) (“AD 2013-24-15”).
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The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1