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

Performance Class 1 helicopter A helicopter with performance such that, in caseof critical power-unit failure, it is able to land on the rejected take-off area or safelycontinue the flight to an appropriate landing area, depending on when the failureoccurs.Performance Class 2 helicopter A helicopter with performance such that, in caseof critical power-unit failure, it is able to safely continue the flight, except when thefailure occurs prior to a defined point after take-off or after a defined point beforelanding, in which cases a forced landing may be required.Performance Class 3 helicopter A helicopter with performance such that, in caseof power-unit failure at any point in the flight profile, a forced landing must beperformed.4 Compliance for applicable aeroplanes4.1 All aeroplanes flying for the purpose of public transport and operated on longrangeover-water flights as described in paragraph 3 shall be equipped withone automatic ELT and two Survival ELT.4.2 All aeroplanes flying for the purpose other than public transport and operatedon extended flights over water as described in paragraph 3 shall be equippedwith one automatic ELT and two Survival ELT.4.3 Except as provided for in paragraph 4.1 and 4.2, all aeroplanes having aMaximum Total Weight Authorised of 2730 kg or less shall be equipped withone automatic ELT.4.4 Except as provided for in paragraph 4.1, 4.2 and 4.3, all aeroplanes shall beequipped with one automatic ELT and one Survival ELT.4.5 ELT equipment carried to satisfy the requirements of paragraphs 4.1, 4.2, 4.3and 4.4 shall operate in accordance with the relevant provisions of ICAOAnnex 10, Volume III, Part II, Chapter 5 (See paragraph 6 of this Notice).4.6 For paragraphs 4.1, 4.2, 4.3 and 4.4, the choice of ELT type and placement ofthe ELT on aeroplanes and associated floatable life support systems mustensure the greatest chance of ELT activation in the event of an accident foraircraft operating over water or land. Placement of transmitter units is a vitalfactor in ensuring optimal crash and fire protection. The placement of thecontrol and switching devices (activation monitors) of automatic fixed ELTand their associated operational procedures will also take into considerationthe need for rapid detection of inadvertent activation and convenient manualswitching by crew members. These should be acceptable to the Director-General.AN-27 P.331 January 2007