Honeywell

AEROSPACE TECHNOLOGIES

You are browsing the product catalog for

You are viewing the overview and resources for

Attention: Our customer portal will be undergoing scheduled maintenance on Sunday, May 4th, from 2:30 AM to 8:30 AM EST. Thank you for your understanding and patience as we enhance your digital experience!
Popular Topics
Place a New Order
Ordering
Place a New Order
Orders
Orders
How do I register for MyAerospace?
Training
How do I register for MyAerospace?
How to Submit an AOG Order Online?
Training
How to Submit an AOG Order Online?
How do I change my password?
Training
How do I change my password?
How do I reset my password?
Training
How do I reset my password?
Where can I get technical support?
Training
Where can I get technical support?
How do I check the Warranty Coverage for my parts?
Training
How do I check the Warranty Coverage for my parts?
/content/aerobt/us/en/search.html
×

Your browser is not supported.

For the best experience, please access this site using the latest version of the following browsers:

Close This Window

By closing this window you acknowledge that your experience on this website may be degraded.

131-9A - Enabling High Efficiency Mode

This video demonstrates how to enter an encryption key into the Data Memory Module (DMM) of a 131-9A APU to enable the High Efficiency Mode (HEM) made possible by the new engine compressor diffuser.

Let's Connect

Sign up to receive exclusive marketing e-communications including updates about our product offerings, special offers, news, and events.

Copyright © 2025 Honeywell International Inc.

Terms & Conditions
Privacy Statement
Your Privacy Choicesicon
Cookie Notice
Global Unsubscribe
Manage Cookies