September / October / November 2015 : Human factors

Written by Dubosc
Saturday, 12 September 2015 00:06

Dear Readers,

We are happy to publish on our Website a paper by Richard GASSET, NADCAP Supplier Voting Member of Lisi Aerospace, which was published in the June 2012 PRI-NADCAP Non-Destructive Newsletter issue that you may read using the following link:

This paper is reproduced with the kind permission of the author(s) and the Performance Review Institute. © Performance Review Institute.

It is known that 85 % of aircraft accidents have human causes. Could we imagine that 85 % of the defective parts that get the “Pass” tick after an NDT are accepted due to human errors? This paper fingers out very currently met situations…that, when added to each other, may make us think so!

We hope that this paper will be of some interest for you and bring you a top - quality information.

Patrick DUBOSC and Pierre CHEMIN


Reliability of NDT can be significantly influenced by the environment in which components are processed and inspected. Consideration of human factors is an area that is all too frequently overlooked. Human factors are typically dependent on a large number of influences, and the following may be areas in which you and your company may want to pay special attention when considering the NDT process within your company.

At a recent NDT Task Group meeting, the topic of human factors came up, and it took me back to my previous position as an FAA Repairman. Part of my responsibility was to help develop a Training Manual as a companion to our Repair Station and Quality Control Manual. Handbook Bulletin for Airworthiness Order 8300.10 then required human factors to be included in the training program. Numerous FAA documents had suggested elements on human factors but none that would apply to our small compressor blade repair facility.

Luck struck when our local Flight Standards District Office (FSDO) was having a two day Aviation Safety Program Workshop and one of the topics was human factors. The facilitator defined human factors as “The discipline of optimizing the relationship between people and their activities by the systematic application of the human sciences, integrated within the framework of system engineering.” He also defined human error as “Where there is general agreement that a person should have done something other than what they did.”

Most important to our facility were the twelve human factors that can cause human error:

The following is a synopsis of each of the human factors described make up part of the presentation.

It could be considered “tribal memory”, which are unwritten rules enforced by the group, peer pressure or habit. Always work as per the instructions or have the instructions changed. At least if things go badly we can say we were following the published procedure. “It’s not my fault” is a nice position to hold.

Human factors should be considered in the design and operation of any NDT facility. The consideration of human factors will often lead to an efficient and effective NDT process.




Last Updated ( Saturday, 12 September 2015 00:28 )