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A time-honored part of our four-step business philosophy is to support the customer's needs after the sale. In addition to our product warranty, Howell offers in-house service for repair and maintenance of Howell equipment and authorized service centers throughout the world.

Customer being helped with their Howell Product

Warranty Policy

A. New Airborne Products

  1. Airborne products shall be warranted for 1000 hours of operation or 1 year after delivery, whichever occurs first.
  2. An extra 6 months shelf-life extension applies for airborne products delivered to qualifying aircraft manufacturers and modification facilities.

B. New Test Equipment

  1. Test equipment products manufactured by Howell Instruments, Inc. are warranted for 1 year after delivery.
  2. Heater Probes and TEMPCAL® Probes are warranted for 1 year after delivery or 100 hours of operation, whichever occurs first.

C. Repaired or Modified Products

  1. Products returned to Howell Instruments, Inc. for repairs or modification will be warranted for 6 months after repair. This warranty applies only to those components replaced or repaired, and does not cover failure caused by other components. The entire product, including components not replaced, has a 60 day LABOR only warranty. If repair parts total less than $100.00, there will be no charge for parts.
  2. Howell Instruments may decline repair to any product that has been previously repaired or otherwise modified by an unauthorized facility.

D. Warranty Limitations

The warranty as stated above will be void if:

  1. It is determined by the manufacturer that the failure was the result of improper handling, application of incorrect power to the product, or application of incorrect signal to the product.
  2. The product is repaired or opened by any facility other than the manufacturer, Howell Instruments, Inc., (except for a facility approved by Howell Instruments as their designated repair facility).
  3. The product is damaged in return shipment to the manufacturer as a result of inadequate packing.
  4. Howell Instruments reserves the right to exclude components purchased from outside vendors that have been determined to be obsolete.

E. Definition of Warranty Repair

  1. Units returned to Howell Instruments, Inc. for repair during their warranty period, as discussed above, shall be repaired at no charge to the customer.
  2. The original warranty period remains unchanged (is not extended) when a product is repaired under warranty. This includes new and repair warranties.

F. Definition of No Charge Repairs

  1. Items returned to Howell Instruments, Inc. for repair may be determined to be no charge to the customer.
Product Category New Warranty
Date Shipped
Hours Used Repair Warranty
Repair or Modify(1)
Solid State Indicators 1 year N/A 6 months / 60 days
Engine Monitors 1 year N/A 6 months / 60 days
Test Equipment 1 year N/A 6 months / 60 days
Accessories 1 year 100 6 months / 60 days
Spare Parts 60 days N/A N/A

(1) Reference Section C

United States

Howell Instruments, Inc.
8945 South Freeway
Fort Worth, Texas 76140
United States of America
Phone: 1-817-336-7411
Fax: 1-817-336-7874
Contact: John Wright


Via del Fosso della Magliana, 34/F
Roma, Italy
Phone: 06-655-5599/0039-06-45686401
Contact: Fiammetta Novellozzi
Sales Manager & Customer Support

United Kingdom

Muirhead Avionics
3 The Square Heathrow
Southall Lane
Southall, Middlesex
Phone: 44-208-571-3422
Fax: 44-208-571-2336
Contact: Steve Wells


Wright Instruments Ltd.
3 Brewster Road
Brampton, Ontario
Canada L6T 5G9
Phone: 905-913-8177
Fax: 905-913-0958
Contact: Jim Wright


ST Aerospace Systems Pte Ltd
(STA Systems)

505A Airport Road
Singapore 539934
Phone: 65-6380-4662
Fax: 65-6487-5912
Contact: Vincent Soh

Customer Survey

Identifying your needs and addressing concerns are a vital part of our commitment to customer satisfaction. Through means of customer input we are given valuable insight to areas where our processes may be enhanced. Please take a few minutes to complete this form. We appreciate your willingness to share your thoughts.

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