Case Study

USS Emory S. Land Parker VFD/Inverter Repair

SS Emory S. Land (AS-39) is a United States Navy submarine tender and the lead ship of her class. She was named for Admiral Emory S. Land.

The ship provides food, electricity, water, consumables, spare parts, medical, dental, disbursing, mail, legal services, ordnance, and any parts or equipment repair that a submarine may require. To accomplish this, the ship has a physical plant similar to that of a small town, including 53 different specialized workshops.

The USS Emory S. Land shipped to AFI Systems from their current dock in the Pacific a 460V, 350HP Parker 890 Series inverter (full part number 890SD/4/0420H/B/1F/A/US) for repair, replacement of all high failure components, and load testing. The drive operated the rotation of their 30-ton crane used to resupply US Navy submarines, and had completely lost power.

AFI Systems' expert drive repair technician (a 10-year Marine Corps veteran who was “happy to help the Marines' taxi service” (in his words), was able to troubleshoot the problem down to a faulty circuit board. Then, due to unavailability of replacement boards, we further troubleshot down to the component level on that board, replaced the faulty components that were preventing the switched-mode power supply from energizing, and also replaced other high failure parts in the entire system. The drive then powered up successfully, and was given an extensive load test on our custom built dynamometer, before shipping back to the US Navy.

Repairs - standard AFI practices

Whether you call or send an email to us, you will get through to someone who can help guide you through the process of getting your component repaired quickly. Most industrial or manufacturers have tight operating or production schedules where there is never a good time for a machine or critical piece of equipment to break down. Get back to operating quickly again with AFI Systems. Consider these advantages:

Our certified technicians follow a step-by-step diagnostic process
Free evaluations
No fix no fees repairs
Fast repair turnaround
State of the art testing equipment
Electronic repairs warranted for two years

We believe in being accessible. Our account managers / customer service team promptly answers incoming calls, and provides quick responses to incoming emails. Many of our customers have 24/7 schedules and we always try to service their needs accordingly.