DISTRIBUTION A. Approved for public release; distribution unlimited.
ENFS-SB-10-001, Page 1 of 5
Number: EN-SB-10-001
Date: 3 February 2012
Subject: Revised Design Criteria for Pressurized Structure
References:
1. JSSG-2006, “Joint Service Specification Guide – Aircraft Structures,”
Department of Defense, 30 Oct 98.
2. JSSG-2009, “Joint Service Specification Guide – Air Vehicle Sub-systems,”
Department of Defense, 30 Oct 98.
Background:
Discussions concerning the design criteria contained in Joint Service Specification
Guide (JSSG) 2006 “Aircraft Structures” (Reference 1) on pressurization proof test
levels prompted ASC/ENFS and NAVAIR to review and revise recommended design
for pressurized structure. Since pressurization criteria encompass multiple
disciplines, this criteria revision has been coordinated with ASC/ENFA Air Vehicle
Sub-systems Branch and NAVAIR 4.3.5.1 (Environmental Management System) and
NAVAIR 4.3.5.3 (Fuel System) for use in update of JSSG-2009 (Reference 2). This
Structures Bulletin supersedes the criteria in JSSG-2006 until the document is
updated to incorporate the content of this bulletin.
Discussion:
Guidance on design pressures for pressurized compartments is contained in
paragraph 3.4.1.12 of JSSG-2006. Guidance for pressurization proof test levels is
contained in paragraph 4.10.5.4.
In its current version, Paragraphs 3.4.1.12 (Pressurization) and A.3.4.1.12
(associated guidance) have led to confusion concerning the applicability of system
failures and design factors of safety. In addition, some of the text is inconsistent and
sometimes inaccurate. Table 1 provides the revised design criteria for pressurized
structure that considers applicable system failures for both flight and ground
operations.
NAVAIR AIR-4.3.3
Attn: Bldg 2187, Suite 2340A
48110 Shaw Road, Unit 5
Patuxent River, MD
20670-1906
Phone 301-342-0283
ASC/ENFS
Attn: Area B, Bldg 28
2145 Monahan Way
Wright-Patterson AFB, OH
45433-7017
Phone 937-255-5312
