Technical Evaluation of the AV-8B/F402 Engine Trim Test Set

Abstract : The AIRTASK/Work Unit tasked the Naval Air Test Center to perform a Technical Evaluation (TECHEVAL) of the AV-8B/F402 Engine Trim Test Set to determine its suitability and supportability when used to trim the F402 engine in a shipboard environment. This report contains the results of testing from 10 through 14 March 1980 which consisted of initial inspection, operational checks, aircraft compatibility tests, and Electromagnetic Susceptibility (EMS) tests. The H249 Engine Trim Test Set is designed to be capable of accurately measuring and displaying low and high pressure tachometer signals, Jet Pipe Temperature (JPT), various engine acceleration times, maximum low pressure compressor speed, and JPT peaks. The test set also features a free-run time position, temperature simulation for static checkout of the JPT indicator, JPT limiter, an engine life recorder, and indicates water injection RPM droop. The test set is 20 in. long by 18 in. wide by 12 in. deep, and weighs 43 lb of which 19 lb is the electronic package.