Predictive Trend Monitoring

Honeywell's Predictive Trend Monitoring (PTM), the advanced health management pilot for Engines, Systems & Services, completed alpha development and is in deployment to 331-350 auxiliary power units and LF507 propulsion pilot customers. PTM trends engine performance and provide early warning of eminent engine failures to prompt preventitive actions. This information allows airlines to avoid costly delays, cancellations and unnecessary maintenance.

A cross-functional Honeywell team expanded the initial PTM pilot to a platform that hosts advanced prognostics and diagnostic content for airline customers. These capabilities are devised to distinguish Honeywell's products and AfterMarket Services in the marketplace. In addition, the host platform leverages Advanced Maintenance & Operation Support System (AMOSS), a diagnostic product developed by Honeywell Aerospace Electronic Systems (AES). AMOSS is a leading industry product for aircraft troubleshooting, diagnosis and fault isolation.

"Our first PTM releases for the 331-350 and LF507 were limited in their capabilities," said Ronald Quinn, PTM Program Manager. Quinn characterized the evolution of PTM from one laboratory computer to a full-blown production system suite of computers. "AMOSS has enabled us to provide diagnostic and prognostic content that is robust and automated on a platform that is geared for growth and expansion."

The latest PTM version went into service on November 21st providing advanced capabilities for 331-350 and LF507 health management. For example, the original PTM release provided trending of exhaust gas temperature and basic sensor checks. With PTM Release 3.0, operators receive regression trending of exhaust gas temperature including margin detection, auto shutdown decoding and reporting, oil/lubrication system trending, and directed troubleshooting through AMOSS Diagnostics.

"Typically, a series of procedures need to be conducted to determine the root cause of a failure or potential failure, " said Gautham Ramohalli, AMOSS Product Manager. "AMOSS cuts troubleshooting time allowing operators to see the isolated fault as well as the maintenance manual references for specific procedures."

In addition, the new PTM release provides advanced graphics capabilities and enhancements to the PTM website used by operators to obtain engine performance information. The initial website was a lab prototype supported by a prototype database. Release 3.0 includes a database upgrade - the product of years of experience in designing, building, and maintaining engines incorporated into prognostic and diagnostic algorithms. Website enhancements also include event notification, problem reports and user profiles. "In addition to providing so much more information to our customers, this latest PTM release is the product of a global Honeywell team," said Quinn. "Our ability to share technologies across Honeywell will continue to benefit our customers and our company."