Airworthiness Directive · Amendment 39-13958 · Boeing Model 737-300, -400, and -500 Series Airplanes; and Model 757-200 and -200CB Series Airplanes
Boeing Model 737-300, -400, and -500 Series Airplanes; and Model 757-200 and -200CB Series Airplanes
This AD applies to the airplanes listed in Table 1 of this AD, certificated in any category:
| Boeing model | As listed in |
|---|---|
| Model 737-300, -400, and -500 series airplanes | Boeing Special Attention Service Bulletin 737-21-1131, Revision 2, dated April 18, 2002. |
| Model 757-200 and -200CB series airplanes | Boeing Special Attention Service Bulletin 757-21-0088, dated April 18, 2002. |
This amendment adopts a new airworthiness directive (AD), applicable to certain Boeing Model 737-300, -400, and -500 series airplanes; and Model 757-200 and -200CB series airplanes, that requires inspection of the applicable body station frames for open body station frames and related investigative/corrective actions; and installation of lanyard hook brackets and lanyard assemblies under the air conditioning overhead ducts, as applicable. This action is necessary to prevent loosened or disconnected overhead ducts from causing ceiling panels to drop below the minimum height of the evacuation zone for the passenger cabin, which could result in inadequate height for safe exit in the event of an emergency evacuation. This action is intended to address the identified unsafe condition.
To prevent loosened or disconnected overhead ducts from causing ceiling panels to drop below the minimum height of the evacuation zone for the passenger cabin, which could result in inadequate height for safe exit in the event of an emergency evacuation, accomplish the following:
(a) The term “service bulletin,” as used in this AD, means the applicable service bulletins listed in Table 1 of this AD.
(b) For Model 737-300, -400, and -500 series airplanes, do the actions required in paragraphs (b)(1) and (b)(2) of this AD at the specified compliance times, in accordance with the Accomplishment Instructions of the service bulletin.
(1) Within 72 months after the effective date of this AD, do a general visual inspection at the applicable body station frames for open body station frames; and, before further flight, do all the related investigative/corrective actions, as applicable; by accomplishing all of the actions in paragraph 3.B. of the service bulletin.
Note 1: For the purposes of this AD, a general visual inspection is defined as: “A visual examination of an interior or exterior area, installation, or assembly to detect obvious damage, failure, or irregularity. This level of inspection is made from within touching distance unless otherwise specified. A mirror may be necessary to enhance visual access to all exposed surfaces in the inspection area. This level of inspection is made under normally available lighting conditions such as daylight, hangar lighting, flashlight, or droplight and may require removal or opening of access panels or doors. Stands, ladders, or platforms may be required to gain proximity to the area being checked.”
(2) Within 72 months after the effective date of this AD, do the actions required in paragraph (b)(2)(i) or (b)(2)(ii) of this AD, as applicable.
(i) For Groups 1 and 3 airplanes identified in the service bulletin: Install the lanyard hook brackets and each lanyard assembly under the air conditioning (AC) overhead ducts in accordance with paragraph 3.C. of the service bulletin.
(ii) For Group 2 airplanes identified in the service bulletin: Install the lanyard hook brackets and the lanyard assemblies under the AC overhead ducts by accomplishing all of the actions in paragraph 3.D. of the service bulletin.
(c) For Model 757-200 and -200CB series airplanes: Within 72 months after the effective date of this AD, do a general visual inspection of the applicable body station frames for open body station frames; and, before further flight, do all the corrective actions, as applicable; by accomplishing all of the actions in the Accomplishment Instructions of the service bulletin.
(d) For Model 757-200 and -200CB series airplanes: Accomplishing the replacement of the original design foam ducts with Saint-Gobain design foam ducts by doing all of the actions in Attachments I and II of Boeing Service Letter 757-SL-21-057-A, dated March 24, 2004, terminates the actions required by paragraph (c) of this AD.
(e) Actions accomplished before the effective date of this AD per Boeing Special Attention Service Bulletin 737-21-1131, original release, dated December 20, 2001; or Revision 1, dated January 25, 2002; are acceptable for compliance with the requirements of paragraph (b) of this AD.
(f) 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.
(g) Unless otherwise specified by this AD, the actions shall be done in accordance with Boeing Special Attention Service Bulletin 737-21-1131, Revision 2, dated April 18, 2002; and Boeing Special Attention Service Bulletin 757-21-0088, dated April 18, 2002; as applicable. The optional terminating action, if accomplished, shall be done in accordance with Boeing Service Letter 757-SL-21-057-A, including Attachements I and II, dated March 24, 2004. 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. 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
