TY91 / TY92 Minor Change for CS-23 Aircraft

DDP Declaration of Design Performance EASA European Aviation Safety Agency ETSO European Technical Standards Order MOPS POH Minimum Operational Performance Standard Pilots Operating Handbook PTT Push To Talk VHF Very High Frequency Trig Avionics Limited Page 3 TY91/TY92 Minor Change for CS-23 Aircraft SUP/TY92/001 11 July 2013 Issue 1.0 2. Introduction The TY91/TY92 VHF radio system is an ED-23C compliant class C (25 kHz offset carrier) and class E (8.33 kHz single carrier) VHF radio. The TY91 has a nominal power output of 6 watts, and meets the power output requirements for Class 4 and Class 6. The TY92 has a nominal power output of 16 watts, and meet the power output requirements for Class 3 and Class 5. The TY91/TY92 is certified to ETSO 2C169a, and TSO C169a. The TY91 and TY92 VHF radios are controlled using a separate front panel controller, called the TC90. This allows the radio to be mounted separately from the instrument panel, and reduces the amount of panel space taken by the VHF radio. The TC90 is certified to ETSO 2C169a, and TSO C169a. The TY91 runs from either 14 volt nominal or 28 volt nominal DC power supply with no configuration changes required. The TY92 requires 28 volt nominal supply. This minor change describes the process of installing a TY91 or TY92. The TY91 or TY92 can be installed as a standalone VHF communication system or as part of a dual VHF communications system. Trig Avionics Limited Page 4 TY91/TY92 Minor Change for CS-23 Aircraft SUP/TY92/001 11 July 2013 Issue 1.0 3. Change Details 3.1 Description of Change The TY91 or TY92 VHF radio can be fitted as a standalone system or as part of a dual communication system. 3.1.1 Stand alone VHF system This change involves removing any existing VHF radio and replacing it with a Trig Avionics TY91 or TY92 VHF transceiver. The processes involved in the change includes pre-testing of the installation; verification of the suitability of the existing power supply wiring; installing the TC90 controller and the TY91/TY92 transceiver; transceiver commissioning; and post-installation testing. These processes are described in detail in the accomplishment instructions in this document. The existing transceiver mounting tray will need to be removed and a new panel installed to mount the controller or install a blanking panel if a conventional 57mm instrument cut-out will be used. The connectors will need to be replaced. The existing antenna and circuit breaker will be re-used. If there is no existing VHF transceiver then the processes involved in installing a TY91/92 will include making a new wiring loom, installing headphone and microphone jacks, fitting the TC90 controller to the aircraft panel, installing a new antenna and selecting and fitting an appropriate circuit protective device. 3.1.2 Dual VHF system This change involves installing the TY91 or TY92 VHF radio as part of a dual VHF transceiver system. The operator will require a method of switching between COM 1 and COM 2 to allow a transmission on either radio. This is most commonly achieved by using an audio panel but some installations may have to install additional switches in the cockpit. A new antenna may also need to be installed. If the dual system relies on an intercom which is integrated into one of the radios, the microphone switching becomes complicated and further system design will be required. As such, these instructions do not cover this type of installation. These instructions will only cover dual installations that have either an audio panel or standalone intercom system already installed. The position of the TC90 must still be located in the aircraft panel where it can be easily read and controlled when the aircraft is being flown by a single person. 3.2 Mechanical Details The TY91/TY92 uses a TC90 head unit to control the transceiver, it has a combination of knobs and press buttons to change frequencies and control the functions of the unit. The active and standby frequencies are displayed on the screen and icons are displayed on the left hand side to indicate when the radio is transmitting or receiving. The panel location should allow the screen to be visible to the pilot and have easy access to the knobs and buttons. The TY91/TY92 is compatible with any TSO approved VHF antenna. The TY91/TY92 combined with the TC90 has a total weight of 440 grams. The effect on weight and balance of the aircraft will be small due to the low weight of the transceiver equipment. After the installation a weight and balance check should be calculated or performed in accordance with the Trig Avionics Limited Page 5 TY91/TY92 Minor Change for CS-23 Aircraft SUP/TY92/001 11 July 2013 Issue 1.0 manufactures instructions. 3.3 Continued Airworthiness Instructions Other than for periodic functional checks required by the regulations, the TY91/TY92 VHF transceiver has been designed and manufactured to allow “on condition maintenance”. This means that there are no periodic service requirements necessary to maintain continued airworthiness, and no maintenance is required until the equipment does not properly perform its intended function. When service is required, a complete performance test as detailed in section 5.4 of these instructions should be accomplished following any maintenance action. 3.4 Installed Equipment Suitability 3.4.1 ETSO The TY91 is certified to ETSO 2C169a and ETSO 2C128 The TY92 is certified to ETSO 2C169a and ETSO 2C128 The TC90 is certified to ETSO 2C169a 3.4.2 Environmental The environmental testing conducted for the TY91/TY92 and TC90 is appropriate for this installation. Key aspects of the TY91 and TY92 environmental qualification are summarised here: DO-160F reference Temperature & Altitude Qualification Category A2 and C1 Loss of Cooling Temperature Variation Humidity Operational Shock & Crash Safety Vibration Magnetic Effect Power Input +70℃ without cooling air Category B Category A Category B type 5 Aircraft zone 2; type 3, 4, 5 to category S level M, type 1 (Helicopters) to category U level G Category Z Category BX Applicability Equipment intended for installation in a partially controlled temperature but pressurised location and installed is a non-pressurised but controlled temperature location. Forced air cooling not required. For a non temperature controlled or partially temperature controlled internal section of the aircraft. Standard humidity environment. Equipment generally installed in fixed-wing aircraft or helicopters, VLA's and sailplanes tested for standard operational shock and crash safety. Single engine fixed wing reciprocating or turboprop. Multi engine less than 5700Kg. Helicopters, reciprocating and turbojet engines. Equipment fitted to instrument panel, console or equipment rack. Equipment and or its connecting cable harness may be mounted within 0.3m of magnetic compass. All verified during ETSO environmental qualification testing. DC equipment intended for use on aircraft electrical system supplied by engine driven alternator or generator, where a battery of significant capacity is on the DC bus at all times. Trig Avionics Limited Page 6 TY91/TY92 Minor Change for CS-23 Aircraft SUP/TY92/001 11 July 2013 Issue 1.0 Voltage Spike Category B Audio Susceptibility Category B Induced Signal Susceptibility Category AC RF Susceptibility Category TT RF Emission Category B Installation where a lower standard of protection is acceptable. DC equipment intended for use on aircraft electrical system supplied by engine drive alternator or generator, where a battery of significant capacity is on the DC bus at all times. Equipment intended for operation where interference-free operation is desirable and installed on aircraft whose primary power is constant frequency or DC. Specified in the HIRF rules; representative of the internal EMI environment from aircraft equipment. Basic emission control. Key aspects of the TC90 environmental qualification are summarised here: DO-160F reference Temperature & Altitude Qualification Category A4 and C4 Loss of Cooling Temperature Variation Humidity Operational Shock & Crash Safety Vibration Magnetic Effect +70C without cooling air Category A Category A Category B type 5 Aircraft zone 2; type 3, 4, 5 to category S level M, type 1 (Helicopters) to category U level G Category Z Applicability Equipment intended for installation in a controlled temperature and pressurized location. Equipment intended for installation in non-pressurised and non- controlled temperature location. Forced air cooling not required. Equipment external to the aircraft or internal to the aircraft. Standard humidity environment. Equipment generally installed in fixed-wing aircraft or helicopters, tested for standard operational shock and crash safety. Single engine fixed wing reciprocating or turboprop. Multi engine less than 5700Kg. Helicopters, reciprocating and turbojet engines. Equipment fitted to instrument panel, console or equipment rack. Equipment and or its connecting cable harness may be mounted within 0.3m of magnetic compass. All verified during ETSO environmental qualification testing. Equipment identified as Category X - no test required Power Input Category X Voltage Spike Category X Equipment identified as Category X - no test required Audio Susceptibility Category X Equipment identified as Category X - no test required Induced Signal Susceptibility Category BC Equipment intended for operation in systems where interference would be controlled to a tolerable level and is installed on aircraft whose Trig Avionics Limited Page 7 TY91/TY92 Minor Change for CS-23 Aircraft SUP/TY92/001 11 July 2013 Issue 1.0 RF Susceptibility Category TT RF Emission Category M primary power is constant frequency or DC. Specified in the HIRF rules; representative of the internal EMI environment from aircraft equipment. Equipment and interconnected wiring located in areas where apertures are electro-magnetically significant and not directly in view of radio receivers antenna. In each case the environmental qualification is appropriate to the installation in the instrument panel of a light piston engine aircraft with a DC electrical system. Trig Avionics Limited Page 8 TY91/TY92 Minor Change for CS-23 Aircraft SUP/TY92/001 11 July 2013 Issue 1.0 3.5 Drawings 3.5.1 Front Panel Cut-out The front panel controller can be fitted to either the compact mounting hole or a conventional 57mm (24 inch) instrument cut-out. The compact mounting is a truncated 58 mm opening; please note that the mounting screws are NOT in the same location for the two options. 3.0 CSK at 100° 3.0 CSK at 100° 18.75 Ф 45.00° 058.00 47.30 All dimensions in millimetres. The drawing is not to scale. Trig Avionics Limited (Drawing A) 058.00 56.00 Ө # 47.30 Ө Page 9 37.50 42.50 TY91/TY92 Minor Change for CS-23 Aircraft SUP/TY92/001 3.5.2 Mounting tray fixing and overall dimensions 48.76 30.00 04.60 Ө 160.06 All dimensions in millimetres. The drawing is not to scale 3.6 Electrical Load Analysis (Drawing B) 90.00 138.28 Ө 21.70 Existing VHF transceivers draw typically 0.27 Amp up to 1.0 Amp when receiving and 2 Amp up to 6 Amp when transmitting. These figures are based on a 14v DC supply. The TY91 draws typically 0.2 Amp from a 14v DC power supply in receive, with currents of around 2 Amp when transmitting. On 28V supplies the currents are lower. The TY92 can only be powered from a 22 to 33v DC power supply and draws typically 0.13 Amp in receive with currents of around 2.5 Amp when transmitting. Since the current taken by the TY91/TY92 is of similar or less than the transceiver it is replacing, any systems that were properly sized to support an existing transceiver will be adequate to support the TY91/TY92. On new TY91/92 installations, the wiring and circuit breaker rating to be used are specified in the accomplishment instructions. On the same basis, it can be concluded that the 30 minute battery requirement of CAP747 GR6 will also be satisfied. On a dual radio installation the circuit breakers and electrical supply will be separate so that a failure in one radio system will not result in both radio's failing as per CAP747 GR18. Trig Avionics Limited Page 10 32.00 64.00 11 July 2013 Issue 1.0 TY91/TY92 Minor Change for CS-23 Aircraft SUP/TY92/001 11 July 2013 Issue 1.0 3.7 Testing Details The test procedure is based on the installation test guidelines in ED-23C, the MOPS for airborne VHF transceivers. 3.8 Flight manual/POH Amendments No AFM amendments are required as part of this Minor Change. A pilot operating booklet is provided (reference 00840-00) with the TY91/TY92 and this should be made available to the flight crew. 3.9 Radio Station Licence Installation of this transceiver may require a new or updated aircraft radio licence. For UK registered aircraft the change needs to be reported to the Directorate of Airspace Policy on a Form DAP1902. For other European registered aircraft the relevant national authority should be contacted. Trig Avionics Limited Page 11