7 chemin de Vaubesnard 91410 Dourdan France tel.(33)1 60 81 55 55 fax.(33)1 60 81 55 56

ABBREVIATED COMPONENT MAINTENANCE MANUAL THREE FREQUENCY ANTENNA FOR ELT P/N 2624-82-ZZ

F 6175

25-61-01 Page 1 of 9 November 2004

LIST OF REVISIONS

Rev. N 2 3 4 5 6 7 Rev. 04/1999 05/2000 03/2001 05/2001 01/2004 11/2004

LIST OF EFFECTIVE PAGES

Page Date Page Date Page Date

1 of 9 4 of 9 7 of 9

11/2004 11/2004 11/2004

2 of 9 5 of 9 8 of 9

11/2004 11/2004 11/2004

3 of 9 6 of 9 9 of 9

11/2004 11/2004 11/2004

LIST OF MATERIALS

Not applicable.

LIST OF ABBREVIATIONS

P/N : part number Rev : revision Ft : feet in : inch m : meter mm : millimeter m : milliohm C : degree Celsius F : degree Fahrenheit SWR : standing wave ratio W : watt CW : continuous wave MHz : mega hertz DC : direct current RF : radio frequency

ABBREVIATED COMPONENT MAINTENANCE MANUAL 2624-82-ZZ Series

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Applicability Although all the variants are the same, there is a change in the paint. Refer to the table below.

P/N variants Paint finish Paint reference 2624-82-00 Gloss white paint Aeromap 1000 BAC 7067

1. DESCRIPTION AND OPERATION

A. General

The external three frequency antenna is used in conjunction with the emergency locator equipment. It is a blade type with a radiating cavity. The three frequency antenna is a compact unit. Six 5,6 mm (0.22 in) diameter screws ground it. The radiation element is fully DC grounded.

The three frequency antenna for emergency locator equipment has the items that follow :

- an aviation aluminium alloy one piece base plate casting,

- a radiating element placed in a printed circuit that supports the coaxial cavities,

- a fibreglass laminated radome,

- a leading edge side coated with anti-erosion treatment,

- a close-cell polyurethane foam cavity-filling.

ABBREVIATED COMPONENT MAINTENANCE MANUAL 2624-82-ZZ Series

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B. Technical data

Operating conditions

- operating temperature range .. - 55C (- 67F) to + 70C (+ 158F)

Operating properties

- operating frequencies ........ 121.5 ; 243 and 406 MHz

- SWR / 50 ohms ................ < 1.5 - permissible power ............ 100 W CW

- polarisation ................. vertical

- radiating element ............ DC grounded

- gain ......................... almost the same as 1/4 monopole - connector .................... BNC type

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C. Overall dimensions

Note : dimensions are in millimetres and (in inches).

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2. TESTING AND FAULT ISOLATION

A. Functional check in the workshop (1) Direct current

- Measure the resistance between ground of the RF connector and ground plane, the value is < 20 m.

(2) RF current - Put the antenna in the centre of a 1 m x 2 m (39.37 in. x 78.74 in.) reflector plane.

- Drill some holes that have the same dimensions and are in the same position as the holes on the antenna.

- Safety the antenna. - Put the assembly in a position where there is not much radioelectric signal noise.

- Connect the antenna to a reflectometer with an approximately 3 m (118.11 in.) coaxial cable. The reflectometer must have a generator or an instrument to measure the reflection and must operate in the 100 to 500 MHz range.

- The reflector plane/antenna assembly is a large metal instrument. Keep it away from the reflectometer (minimum distance of 3 to 4 m (118.11 to 157.48 in.) from all sides).

- Calibrate the reflectometer. - The SWR must be less than 1.5.

REFLECTOMETER

REFLECTOR PLANE

CONNECTING CABLE

ABBREVIATED COMPONENT MAINTENANCE MANUAL 2624-82-ZZ Series

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B. Functional check in the aircraft Carry out the same procedure as described in paragraphs A(1) and A(2).

3. SCHEMATIC AND WIRING DIAGRAMS

Not applicable.

4. DISASSEMBLY

Not applicable.

5. CLEANING

Not applicable.

ABBREVIATED COMPONENT MAINTENANCE MANUAL 2624-82-ZZ Series

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6. CHECK

- Make sure there is no corrosion on the parts. - Make sure there is no crack or physical damage. - Make sure there is no paint erosion.

NOTE : If you find paint erosion, send the antenna back.

7. REPAIR

Not applicable : only the manufacturer repairs the antenna.

8. ASSEMBLY

Not applicable.

9. FITS AND CLEARANCE

Not applicable.

10. SPECIAL TOOLS, FIXTURE AND EQUIPMENT Not applicable.

ABBREVIATED COMPONENT MAINTENANCE MANUAL 2624-82-ZZ Series

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11. ILLUSTRATED PARTS LIST

Figure 1

1

ABBREVIATED COMPONENT MAINTENANCE MANUAL 2624-82-ZZ Series

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FIG ITEM PART NUMBER 1234567 NOMENCLATURE USAGE FROM TO

UNIT PER ASSY

1

1 - 1A

10

2624-82 2624-82-00

2909

3 FREQUENCY ELT ANTENNA 3 FREQUENCY ELT ANTENNA

o-ring

RF RF

1 1

1

- ITEM NOT ILLUSTRATED