DISTRIBUTION A. Approved for public release; distribution unlimited.
EZ-SB-16-002, Page 1 of 12
Number: EZ-SB-16-002
Date: 13 May 2016
Subject: Structural Overloads – Mishap Assessment and Disposition Process
References:
1. Department of Defense Standard Practice, MIL-STD-1530C, “Aircraft Structural
Integrity Program”, 1 November 2005
2. JSSG-2006, “Joint Service Specification Guide Aircraft Structures”, 30 October 1998
3. TO 1-1B-50, “Joint Service Technical Manual - Aircraft Weight and Balance”, dated
1 Aug 2015
Background:
The goal of the Aircraft Structural Integrity Program (ASIP) as described in Reference 1
is to ensure the desired level of structural safety, performance, durability, and
supportability with the least possible economic burden throughout the aircraft’s design
service life. Use of the five primary ASIP tasks is predicated on the aircraft usage
remaining within the established operational limitations. Disposition of aircraft structure
for mishap events resulting in structural overloads may involve revisiting elements of
Tasks II-IV of ASIP using the guidance documented in Reference 2. This Structures
Bulletin describes the steps to disposition an aircraft structure that has been subjected to
loads in excess of the design limit load. The process described and shown in Figure 1 is
to evaluate and assess the integrity of the mishap aircraft (MA) structure by determining
the loads for the mishap event, identifying components with compromised structural
integrity, and validating repairs and/or modifications to restore the structural integrity of
the MA. The cost & schedule associated with the process to restore structural integrity
should be compared to the alternatives of imposing flight limitations, revising the service
life limit, adding maintenance requirements, replacing structural components,
implementing repairs/modifications, and retiring the aircraft.
Structures Bulletin
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