Airworthiness Directive · Amendment 39-13787 · Boeing Model 777 Series Airplanes
Boeing Model 777 Series Airplanes
Model 777-200 and 777-300 series airplanes, line numbers 001 through 400 inclusive, certificated in any category.
This amendment adopts a new airworthiness directive (AD), applicable to certain Boeing Model 777 series airplanes, that requires replacing four socket contacts on the four boost pumps of the main fuel tanks with new, high-quality gold-plated contacts, and sealing the backshell of the connector with potting compound. This action is necessary to prevent a possible source of ignition in a flammable leakage zone, which could result in an undetected and uncontrollable fire in the wheel well or wing trailing edge, and a possible fuel tank explosion. This action is intended to address the identified unsafe condition.
To prevent a possible source of ignition in a flammable leakage zone, which could result in an undetected and uncontrollable fire in the wheel well or wing trailing edge, and a possible fuel tank explosion, accomplish the following:
(a) Within 18 months after the effective date of this AD, for all four boost pumps of the main fuel tanks, replace the socket contacts in positions 2, 4, 6, and 7 with new, high-quality gold-plated contacts; and seal the backshell of the connector with potting compound; in accordance with the Accomplishment Instructions of Boeing Service Bulletin 777-28-0028, Revision 1, dated July 15, 2004.
Note 1: Revision 1 of Boeing Service Bulletin 777-28-0028 incorrectly refers to June 06, 2002, as the date of issuance of the original issue of the service bulletin; the correct date is October 24, 2002.
(b) Replacements done before the effective date of this AD in accordance with Boeing Special Attention Service Bulletin 777-28-0028, dated October 24, 2002, as revised by Boeing Service Bulletin Information Notice 777-28-0028 IN 01, dated February 13, 2003; are acceptable for compliance with the requirements of paragraph (a) of this AD.
(c) In accordance with 14 CFR 39.19, the Manager, Seattle Aircraft Certification Office, FAA, is authorized to approve alternative methods of compliance (AMOCs) for this AD.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
Aircraft
