Gulfstream G650ER Horizontal Stabilizer System Sensors PDF

GULFSTREAM G650ER SYSTEM DESCRIPTION MANUAL HORIZONTAL STABILIZER SYSTEM SENSORS — SYSTEM DESCRIPTION 1. General A. Description There are two independent dual channel position resolvers that provide feedback to the Horizontal Stabilizer Control Unit (HSCU). The resolvers provide the horizontal stabi...

GULFSTREAM G650ER SYSTEM DESCRIPTION MANUAL HORIZONTAL STABILIZER SYSTEM SENSORS — SYSTEM DESCRIPTION 1. General A. Description There are two independent dual channel position resolvers that provide feedback to the Horizontal Stabilizer Control Unit (HSCU). The resolvers provide the horizontal stabilizer trim system with the Horizontal Stabilizer Trim Actuator (HSTA) position data. The data correlates to the stabilizer surface position indicated by both HSCU channels. See Figure 1. The HSCU provides the position to the modular avionics units and Flight Control Computers (FCCs). channel 1 of the HSCU receives data from a resolver geared to the secondary load path. channel 2 receives data from a resolver geared to the primary load path. Each channel of the HSCU communicates with a corresponding FCC ARINC 429 (A429) digital communication bus. 2. Component Location COMPONENT ATA QTY PER A/C LOCATION Horizontal stabilizer position resolver 27-44-01 2 On HSTA 3. Component Details A. Horizontal Stabilizer Position Resolver There are two resolvers are installed on the HSTA and they provide HSTA position feedback to the HSCU. The resolvers are independent, dual channel, brushless resolvers. The resolvers are installed in the following locations: Mounted at the ballscrew (primary load path) and provides feedback to channel 2 of the HSCU Mounted to the secondary load path and provides feedback to channel 1 of the HSCU 4. Controls and Indications A. Circuit Breakers The system is protected by the following circuit breakers: NOMENCLATURE PANEL LOCATION POWER SOURCE STAB 2 DC REER A7 R ESS 28VDC STAB CH 1 REER E1 EMERG BUS 115VAC STAB 1 DC LEER B10 L ESS 28VDC STAB CH 2 PDB PDB / EER R MAIN BUS 115VAC 27-44-00 Page 1 August 15/14 GULFSTREAM G650ER SYSTEM DESCRIPTION MANUAL B. CAS Messages The CAS messages for the system are shown in the following table: MESSAGE COLOR MESSAGE DESCRIPTION Stabilizer Rigging Complete Blue Rigging is valid for the current aircraft. Message occurs when in maintenance mode after autorigging is satisfactorily completed. No action required. Stabilizer Maintenance Required Blue The HSCU has flagged a maintenance item. System redundancy has not been lost. Stabilizer Failed Amber Horizontal stabilizer not responding to movement commands or surface position information is unreliable or unavailable. If flight control system is in normal mode, PITCH trim switch on control wheel adjusts elevator trim position. NOTE The backup pitch trim switch on the trim control module shall not be used. Stabilizer Channel Fail Amber A horizontal stabilizer control channel has failed. Notify maintenance for corrective action. Loss of valid pitch trim communication from the FCCs to the HSCU. Continue flight using BACKUP PITCH trim switch. PITCH trim switch on control wheel will be inoperative. Stabilizer Primary Trim Fail Amber NOTE This message may be accompanied by FCC Alternate Mode (amber). NOTE: The FCC status information required by the flightcrew is shown on the main displays as CAS messages and synoptic page data. 5. Operation A. Horizontal Stabilizer System Sensors The output of each HSTA position resolver is compared during initial power up to verify agreement between the channels of the HSCU. Once the initial power up is complete and the active channel of the HSCU is defined, the resolver outputs are not compared during the operation of the aircraft. 27-44-00 Page 2 August 15/14