Model 517

The unit is available in either a standalone, on-wing (517P) or rack-mounted, test cell (517T) version, both of which are to be used in conjunction with any of  the ACES Systems' 1700 series analyzers. Airframe-specific cables connect the unit directly to the aircraft's EVM system eliminating the need to remove or open cowlings or set up additional equipment to perform vibration analysis.

The Model 517 provides accurate speed signals from the engine-generated N1 and N2 to ACES Systems' analyzers. The unit can also detect a once-per-revolution signal from the N1 speed sensor on newer PWC engines for use in fan trim balancing.

When used in speed monitoring mode, the N1 and N2 speeds detected by the unit are used by the ACES Systems' analyzer to produce a single sweep vibration survey. During the procedure, the analyzer provides on-screen, step-by-step instructions for performing the vibration survey that are based on the PWC-approved survey procedures. These instructions are loaded into the ACES Systems' analyzer from an engine-specific procedure card. The survey data is collected as a full waterfall transient, along with filtered N1 and N2 vibration traces. These surveys are correlated to production test cells at Pratt and Whitney Canada and can be transmitted directly to the company for analysis and evaluation.

When used for fan trim balancing, the Model 517 extracts a once-per-revolution signal from the N1 speed signal and uses this as the phase reference for fan trim balancing. The ACES Systems' analyzer uses a PWC-approved procedure to guide the user through the balance process. As in the vibration procedure, these instructions are loaded into the analyzer from an engine-specific procedure card.

Specifications subject to change without notice.

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