An O&SHA provides: 

• Corrective or preventive measures to minimize the possibility of an error resulting in an aviation incident or accident; 

• Recommendations for changes in hardware, software, or procedures to achieve an acceptable level of safety risk in the NAS operational environment; 

• Development of effectively placed warning and caution notes, as necessary; 

• Requirements for special training information for personnel who will carry out the procedures; and 

• Recommendations for special equipment, such as personal protective clothing or devices (e.g., antistatic wrist straps and mats), that may be required for tasks to be carried out without impacting the safety of NAS operations. 

## 3.4 Inputs 

Prior to performing the O&SHA, appropriate task analyses should be conducted on all pertinent phases of operation/support. In addition, the following are some of the other possible inputs for an O&SHA: 

• Previous safety analyses (e.g., PHAs, System Hazard Analyses or Sub-System Hazard Analyses). 

• Procedures. 

• Sequence diagrams. 

• Operation and functional analyses. 

• Equipment layout diagrams. 

• System and sub-system design specifications. 

• Equipment and interface drawings. 

• Operations and maintenance instructions. 

• Human factors engineering data. 

• Task design. 

• System/operational design. 

• Hardware failure modes. 

## 4 Preparing the O&SHA 

## 4.1 Analyzing Procedures 

An analysis of the operating/support procedures must be completed to ensure that: 

• Required tasks, the human-machine environment, interpersonal interactions, and the sequence of operating/support steps will not create an unacceptable safety risk to NAS operations; 

• Procedures do not expose personnel to any unacceptable safety hazards that may impact NAS operations; 

