Airworthiness Directive · Amendment 39-13777 · Boeing Model 777 Series Airplanes
Boeing Model 777 Series Airplanes
Model 777-200 and 777-300 series airplanes, line numbers 002 through 290 inclusive; certificated in any category.
This amendment adopts a new airworthiness directive (AD), applicable to certain Boeing Model 777 series airplanes. This action requires an inspection to determine the part number of the filter/ regulator on the fire extinguishing system installed in the lower cargo compartment of the airplane, and re-identification of the filter/ regulator, or replacement of the filter/regulator with a new filter/ regulator, if necessary. This action is necessary to prevent leakage of fire extinguishing agent through the filter/regulator of the cargo fire extinguishing system, which could result in the inability of the fire extinguishing system to suppress a fire in the cargo compartment of the airplane. This action is intended to address the identified unsafe condition.
To prevent leakage of fire extinguishing agent through the filter/regulator of the cargo fire extinguishing system, which could result in the inability of the fire extinguishing system to suppress a fire in the cargo compartment of the airplane, accomplish the following:
Note 1: The Accomplishment Instructions of Boeing Service Bulletin 777-26-0028, dated November 2, 2000, also refer to the following Walter Kidde Service Bulletins as additional sources of service information for accomplishment of the replacement: 473494-26-405, Revision 1, dated November 1, 2000; 473494-26-422, dated April 13, 2000; 473857-26-406, Revision 1, dated November 1, 2000; 473857-1-26-423, dated April 13, 2000; 473995-1-26-424, dated April 13, 2000; and 473995-26-408, Revision 2, dated November 1, 2000.
(a) Within 60 months after the effective date of this AD: Inspect the lower cargo fire extinguishing filter/regulator to determine the part number (P/N). Instead of inspecting the part, a review of airplane maintenance records is acceptable if the P/N of the part can be positively determined from that review.
(1) If no filter regulator P/N 473494-1, P/N 473857-1, or P/N 473995-1 is found, no further action is required by this paragraph.
(2) If any filter/regulator having P/N 473494-1, P/N 473857-1, or P/N 473995-1 is found and the serial number does not contain suffix “A,” within 60 months after the effective date of this AD, replace the filter/regulator with a new filter/regulator, per the Accomplishment Instructions of Boeing Service Bulletin 777-26-0028, dated November 2, 2000.
(3) If any filter/regulator having P/N 473494-1, P/N 473857-1, or P/N 473995-1 containing a serial number with suffix “A” is found, within 60 months after the effective date of this AD, do paragraph (a)(3)(i) or (a)(3)(ii).
(i) Re-identify the filter/regulator by following the Accomplishment Instructions of the applicable Walter Kidde Service Bulletin that follows: for P/N 473494-1, use Service Bulletin 473494-26-422, dated April 13, 2000; for P/N 473857-1, use Service Bulletin 473857-1-26-423, dated April 13, 2000; for P/N 473995-1, use Service Bulletin 473995-1-26-424, dated April 13, 2000.
(ii) Replace the filter/regulator with a new filter regulator per the Accomplishment Instructions of Boeing Service Bulletin 777-26-0028, dated November 2, 2000.
Note 2: Filter/regulators having P/N 473494-1, P/N 473857-1, and P/N 473995-1 that have a serial number with suffix “A” are good parts and are identical in form, fit, and function to P/N 473494-3, P/N 473857-3, and P/N 473995-3 respectively. Re-identification of the part numbers ensures unique part numbering.
(b) As of the effective date of this AD, no person may install on any airplane a filter/regulator with any of the following Walter Kidde Aerospace P/Ns: P/N 473494-1 (with or without a serial number with suffix “A”), P/N 473857-1 (with or without a serial number with suffix “A”), or P/N 473995-1 (with or without a serial number with suffix “A”), unless a P/N with a serial number with suffix “A” has been re-identified per paragraph (a)(3)(i) of this AD.
(c) In accordance with 14 CFR 39.19, the Manager, Seattle Aircraft Certification Office (ACO), FAA, is authorized to approve alternative methods of compliance (AMOCs) for this AD.
(d) Unless otherwise specified in this AD, the actions shall be done in accordance with the service bulletins listed in Table 1 of this AD.
| Service bulletin | Date |
|---|---|
| Boeing Service Bulletin 777-26-0028 | November 2, 2000. |
| Walter Kidde Aerospace Service Bulletin 473494-26-422 | April 13, 2000. |
| Walter Kidde Aerospace Service Bulletin 473857-1-26-423 | April 13, 2000. |
| Walter Kidde Aerospace Service Bulletin 473995-1-26-424 | April 13, 2000. |
This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Copies may be obtained from Boeing Commercial Airplanes, P.O. Box 3707, Seattle, Washington 98124-2207; and Kidde Technologies, Inc., 4200 Airport Drive Northwest, Wilson, North Carolina 27896. Copies may be inspected at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington; or at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, call (202) 741-6030, or go to: http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html.
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
