AGMA 05FTM16-2005 pdf free.CH47D Engine Transmission Input Pinion Seeded Fault Test.
The TVDS analyzer was developed as an enhanced derivative of the Stewart Hughes S-61 system uilized during the UK Civil Aviation Authority Health and Usage Monitoring System Trial. It offered a Stewart Hughes Signal Averaging (SGAV) analysis suite up to FM4A/B and key SOA 1 IDENT/ COMP analysis techniques of the Stewart Hughes MSDA Base Band
Power Spectrum (BBPS) Package. It was designed to process transmission vibration signals from every major shaft and gear on the CH-47D drive system at least every 1 50,000 fatigue cycles. The analyzer was designed and built with default alarm levels for each analysis technique. At the discretion of the analyzer operator, the alarm levels could be re-established at the mean of the average value of the first N samples plus 5 standard deviations or to a specific level. It was designed with a luminescent display 1 keypad that is used to operate and monitor the analyzer during configuration downloading and data transfer. The analyzer also has a unique set of four warming lightsthat would notify the operator when any single analysis technique on an individual component exceeded its threshold. Each light represented an analysis technique; therefore, if four or more techniques were exceeded at one time, all four of the waming light indicators would be iluminated. The analyzer utilized an IBM compatible PC, operating under the XENIX and MS DOS operating systems, as a ground station. The ground station was used to configure the analyzer for testing, long term storage of the data transferred from the analyzer, a platform to review analyzed data utilizing a set of graphic displays and a medium to transfer test data. Figure I is a picture of the BRP’s TVDS Analyzer and its support PC ground station.
The CH-47D aircraft contains two engine transmissions mounted on the front of the left hand and right hand engines, see Figure 2. The engine transmission consists of a single spiral bevel mesh with an overall gear reduction of 1.23:1. The transmission transfers the power received from the engine through a quill shaft and redirects the power 90° to the combiner transmission via shafting. Each engine transmission has a continuous twin engine design power rating of 3,750 hp and a single engine design power rating of 4,600 hp with both ratings at an input speed of 15,066 rpm and an output speed of 12,263 rpm. The transmission also incorporates a one-way clutch, which allows the drive system to overrun the engines during autorotation or a sudden reduction in engine rpm. Each of the two engine transmissions are the same except for the location of some external lubrication system components. Either transmission can be converted to one for the opposite side by exchanging the location of these components.Figure 2 also shows a sectioned view of the engine transmission.AGMA 05FTM16 pdf free download.