HR Smith Techtest 503 Series Maintenance Manual Download Page 1

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MAINTENANCE MANUAL

FOR

EMERGENCY LOCATOR TRANSMITTER

TYPE 503 SERIES

Issue 17 - 11.04.18

CN 10407

HRS1013-04-02

Commercial In Confidence

Techtest

Limited

Street Court

Kingsland, Leominster

Herefordshire HR6 9QA, England

Telephone

+44(0)1568 708 744

E-mail: [email protected]

Fax: +44(0)1568 708 713

www.hr-smith.com

Emergency

Location

and Rescue

Equipment

Summary of Contents for Techtest 503 Series

Page 1: ... 17 11 04 18 CN 10407 HRS1013 04 02 Commercial In Confidence Techtest Limited Street Court Kingsland Leominster Herefordshire HR6 9QA England Telephone 44 0 1568 708 744 E mail street hr smith com Fax 44 0 1568 708 713 www hr smith com Emergency Location and Rescue Equipment ...

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Page 3: ...echnical import within each new or revised leaf will be identified by a marginal indicator Such indicators will be omitted when the leaf is next re issued When the whole of the chapter is so changed or reorientated that the inclusion of amendment indicators would be impracticable the words Completely Revised will appear at the head of the relevant chapter Any queries regarding this manual should b...

Page 4: ... Issue number Changed by Date C N Reference Pages Affected FOR PREVIOUS ISUES REFER TO ARCHIVES 13 S Prescott 21 05 15 CN TT7120 13 14 Drawings updated 14 S Prescott 31 05 16 CN 10146 9 15 S Prescott 21 03 17 CN 11100 7 16 S Prescott 16 01 18 CN 11821 9 17 S Prescott 11 04 18 CN 10407 5 ...

Page 5: ...ntroller 6 2 4 Mounting Rack 6 2 5 Interface Unit 7 2 6 Water Activated Switch 7 2 7 Antenna 7 3 ELT INHIBIT FACILITY 7 3 1 Inhibit Facility 7 3 2 Inhibit Connection 8 4 SERVICING 8 4 1 Physical Inspection 8 4 2 Battery Replacement 8 4 3 Troubleshooting 8 4 4 Diagnose Mode 8 4 5 Repair 9 4 6 Antenna 9 4 7 Operation 9 5 RECHARGING CONDITIONING THE G SWITCH BATTERY PACK 9 5 1 Testing the Battery Pac...

Page 6: ...Commercial In Confidence Issue 17 11 04 18 CN 10407 HRS1013 04 02 4 ...

Page 7: ...aircraft The COSPAS SARSAT message programmed is determined by the COSPAS SARSAT authority of the country where the ELT is to be registered It should be noted however that a USER LOCATION protocol message only encodes positional information with a resolution of 4 minutes The NATIONAL LOCATION and STANDARD LOCATION protocol message formats encode positional information with a resolution of 4 second...

Page 8: ... indicator and Inhibit switch 2 4 Mounting Rack A0637 Series To be effective the G Switch has to be mounted to coincide with the expected G forces in any accident It is therefore necessary to mount the G Switch to the airframe in the correct attitude and ensure that the ELT is permanently connected to the G Switch The mounting rack will be positioned to best withstand high G loading in the event o...

Page 9: ...inhibit facility These variants are 503 7 3 503 7 3INH 503 7 4 503 7 12INH 503 7 14 503 19 1 503 19 2 503 19 2A 503 19 4 503 19 5 503 19 7 503 19 8 503 19 10 503 19 11 503 19 12 503 35 503 35 1 503 35A 503 35AA 503 35 AM 503 35A AM For all other G Switch variants Pins 10 11 12 on the G Switch should not be connected The ON position of the ARM OFF ON switch on the G Switch over rides all the other ...

Page 10: ... An additional G Switch and remote controller switch are included to enable the ELT to be switched to ON either on impact or by the aircrew Since the ELT has an in built test system and the test function can be activated at the ELT and at either of the two switches the system can be tested A test failure at the remote control switch indicates a switch failure a G Switch failure a wiring failure or...

Page 11: ...re completed In the event of more than one fault there is a one second gap between each set of bleeps The G Switch will not be able to read the ELT test results if there is a communications failure 4 5 Repair No maintenance over and above physical inspection and battery replacement is possible at other than at the manufacturers 4 6 Antenna The antenna and R F feeder should be subject to VSWR test ...

Page 12: ...attery under load is the best way to gauge its condition The following table of measurements are intended to help ascertain the condition of the battery pack but is only intended as guide BATTERY CONDITION TERMINAL STATUS POTENTIAL Just completed charging cycle Open circuit 6 5V to 7 2V Just completed charging cycle 100 Ohm resistor connected across terminals 6 9V dropping rapidly 15 minutes after...

Page 13: ...11 04 18 CN 10407 HRS1013 04 02 6 ILLUSTRATED PARTS Figure 1 ELT 503 1 with battery fitted Recessed ON OFF Test Reset switch Battery removal clip RF Output TNC connector 503 1 ELT A0673 1 ELT battery pack G Switch interface connector 11 ...

Page 14: ...04 02 Figure 2 G SWITCH 503 7 503 19 26 way D type Connection to 503 1 Transmitter Figure 3 G SWITCH with GPS 503 35 503 36 26 way D type Connection to 503 1 Transmitter GPS ARM OFF ON Toggle Switch TEST RESET Switch ARM OFF ON Toggle Switch TEST RESET Switch 12 ...

Page 15: ...OLLER 503 52 9 way D type connector fitted with screwlocks DZUS Fasteners ON Test Reset Switch System Function Indicator Lamp Figure 4 REMOTE CONTROLLER 503 4 503 17 503 20 503 53 DZUS Fasteners 9 way D type connector fitted with screwlocks ON Test Reset Switch System Function Indicator Lamp ...

Page 16: ...3 04 02 Figure 7 FIXED MOUNTING TRAY A0637 1 A0637 3 A0637 5 Figure 6 AF AP ELT COCKPIT CONTROLLER 503 51 19 way circular connector DZUS Fasteners Transmit Switch with guard Inhibit Switch with guard Test Reset button Fault Indicator Transmit Test Indicator 14 ...

Page 17: ...cial In Confidence Issue 17 11 04 18 CN 10407 HRS1013 04 02 10 274 1 Portable Antenna Quick Release Buckle and Strap Figure 9 QUICK RELEASE TRAY A0637 8 Figure 8 FIXED PORTABLE MOUNTING TRAY A0637 A0637 6 15 ...

Page 18: ...mercial In Confidence Issue 17 11 04 18 CN 10407 HRS1013 04 02 Figure 10 INTERFACE UNIT 503 15 Series Figure 11 WATER ACTIVATED SWITCH 503 23 1 3 way circular connector Air Outlet hole Water Inlet holes 16 ...

Page 19: ...Commercial In Confidence Issue 17 11 04 18 CN 10407 HRS1013 04 02 17 Figure 12 10 102 19 ANTENNA Figure 13 10 102 29 ANTENNA Figure 14 10 118 28 ANTENNA Figure 15 10 118 35 ANTENNA ...

Page 20: ...Commercial In Confidence Issue 17 11 04 18 CN 10407 HRS1013 04 02 Figure 18 10 264 35 ANTENNA Figure 19 10 274 1 ANTENNA Figure 16 10 118 32 ANTENNA Figure 17 10 152 19 ANTENNA 18 ...

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