# PATT

> Tool for railroads to determine FRA Part 219 post-accident drug and alcohol testing requirements. (iPhone/iPad app by Federal Railroad Administration.)

- Source: https://appshunter.io/ios/app/patt/id1435167768 (this page in markdown: same URL + `.md`)
- Developer: [Federal Railroad Administration](https://appshunter.io/developer/643005217)
- Category: Utilities
- Price: Free
- Rating: 5.00/5 from 4 App Store ratings
- Age rating: 4+
- Requires: iOS 15.0 · 3 MB
- Languages: American English
- Released: 2018-12-07
- Data updated: 2026-06-04
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/patt/id1435167768/reviews.md

## What is PATT?

FRA’s 49 CFR Part 219, Control of Alcohol and Drug Use contains requirements for post-accident testing if certain conditions are met.  This application is intended to aid railroads and their contractors in determining when a qualifying accident has occurred that requires Part 219 Subpart C testing.  The FRA’s post-accident testing program has been the cornerstone the agency’s drug and alcohol testing efforts since 1985 and pre-dates the publication of most of the rest of Part 219 and the USDOT’s testing procedures regulation, 49 CFR Part 40.

Part 219 Subpart C defines the train accident/incident thresholds that require testing.  This post-accident testing helps FRA accident investigators determine whether the use of drugs and alcohol by involved railroad employees or contractors may have contributed to the cause or severity of a particular accident.  The goal is that each regulated employer (railroad or contractor) is fully prepared to conduct post-accident testing if a rule-triggering event occurs; that the decision to test is made quickly after reasonable inquiry and good faith judgment by an on-site supervisor.  Blood and urine collections from surviving employees/contractors must be completed within for (4) hours of the accident with the proper supplies and forms; and blood, urine, and tissue collections from fatally injured personnel must be completed as soon as practicable.  In addition, this application is likewise intended to protect employees from inadvertent incursions upon their right-to-privacy represented by tests performed erroneously.

## Key features

- Determines qualifying accidents for testing
- Aids in quick decision-making
- Ensures compliance with FRA regulations
- Protects employee privacy
- Supports post-accident testing procedures


## Frequently asked questions about PATT

### What is PATT used for?

PATT is designed to help railroads and their contractors determine when a qualifying accident has occurred that necessitates post-accident alcohol and drug testing under FRA's 49 CFR Part 219 regulations.

### Does PATT help with drug and alcohol testing procedures?

Yes, PATT aids in the quick decision-making process for on-site supervisors to initiate testing after a rule-triggering event, ensuring compliance with FRA's Subpart C requirements.

### How does PATT protect employees?

PATT is intended to protect employees from inadvertent incursions upon their right to privacy by helping to prevent tests that are performed erroneously or are not required by regulation.

### What is the rating for PATT?

PATT has a perfect rating of 5.0 stars based on 4 user ratings.

### Is PATT available on multiple devices?

Yes, PATT is available for iPhone, iPad, and iPod devices.

### How often is PATT updated?

The latest version of PATT is 1.2.5, and it was last updated on January 19, 2026. This indicates a recent update.

### What is the age rating for PATT?

PATT has an age rating of 4+, making it suitable for a wide range of users.

### Does PATT have ads?

No, PATT does not contain advertisements.

## Version history (last 5 releases)

### 1.2.5 — 2026-01-19

Updated damage threshold for 2026

### 1.2.4 — 2024-12-27

Adjusted damage threshold for 2025

### 1.2.3 — 2023-12-20

Updated for 2024

### 1.2.2 — 2023-01-31

Updated monetary threshold and PDFs

### 1.2.1 — 2022-02-08

Updated PDFs

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## More apps by Federal Railroad Administration

- [Rail Crossing Locator](https://appshunter.io/ios/app/rail-crossing-locator/id643005214)
- [Laws & Regs](https://appshunter.io/ios/app/laws-and-regs/id868138071)
- [HOS Manual](https://appshunter.io/ios/app/hos-manual/id1103913070)

All apps by Federal Railroad Administration: https://appshunter.io/developer/643005217

## Related topics

[patt](https://appshunter.io/ios/topics/patt) · [box 219](https://appshunter.io/ios/topics/box-219) · [azuga eld](https://appshunter.io/ios/topics/azuga-eld)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-04.*