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31 July 2011 C1 CIVIL AVIATION DEPARTMENT HONG KONG ...

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5 Compliance for applicable helicopters5.1 All Performance Class 1 and 2 helicopters operating on flights over water at adistance from land corresponding to more than 10 minutes at normal cruisespeed shall be equipped with one automatic ELT and one Survival ELT foreach raft carried (but not more than a total of two Survival ELT are required).5.2 Except as provided for in paragraph 5.1, all Performance Class 1 and 2helicopters shall be equipped with one automatic ELT and one Survival ELT.5.3 All Performance Class 3 helicopters operating on flights over water beyondautorotational or safe forced landing distance from land shall be equipped withone automatic ELT and one Survival ELT for each raft carried (but not morethan a total of two Survival ELT are required).5.4 Except as provided for in paragraph 5.3, all Performance Class 3 helicoptershaving a Maximum Total Weight Authorised of 2730 kg or less shall beequipped with one automatic ELT.5.5 Except as provided for in paragraph 5.3 and 5.4, all Performance Class 3helicopters shall be equipped with one automatic ELT and one Survival ELT.5.6 ELT equipment carried to satisfy the requirements of paragraphs 5.1, 5.2, 5.3,5.4 and 5.5 shall operate in accordance with the relevant provisions of ICAOAnnex 10, Volume III, Part II, Chapter 5 (See paragraph 6 of this notice).5.7 For paragraphs 5.1, 5.2, 5.3, 5.4 and 5.5, the choice of ELT type andplacement of the ELT on helicopters and associated floatable life supportsystems must ensure the greatest chance of ELT activation in the event of anaccident for aircraft operating over water or land. Placement of transmitterunits is a vital factor in ensuring optimal crash and fire protection. Theplacement of the control and switching devices (activation monitors) ofautomatic fixed ELT and their associated operational procedures will also takeinto consideration the need for rapid detection of inadvertent activation andconvenient manual switching by crew members. These should be acceptableto the Director-General.6 Highlights of ICAO Annex 10, Volume III, Part II, Chapter 56.1 ELT shall operate on 406 MHz and 121.5 MHz simultaneously.6.2 The technical characteristics for the 406 MHz component of an integral ELTshall be in accordance with paragraph 5.3 of ICAO Annex 10, Volume III,Part II, Chapter 5.6.3 The technical characteristics for the 121.5 MHz component of an integral ELTshall be in accordance with paragraph 5.2 of ICAO Annex 10, Volume III,<strong>31</strong> January 2007 AN-27 P.4

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