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

CIVIL AVIATION DEPARTMENTHONG KONG, CHINAAirworthiness Notice1 ApplicabilityTHIS NOTICE GIVES DETAILS OF A MANDATORY ACTIONMINIMUM SPACE FOR SEATED PASSENGERSNo. 64Issue 430 May 2006This Airworthiness Notice is applicable to all Hong Kong registered aeroplanes over5700 kg MTWA, certificated in the Transport Category (Passenger) and configured tocarry 20 or more passengers.2 Introduction2.1 The layout of cabin interiors must be approved under modification approvalprocedures. As part of that approval each seat type shall be approved asrequired by CS 25.785, JAR 25.785 or BCAR Section D, Chapter D4-4paragraph 2.1.2. The approval procedure for such controlled items is definedin HKAR-1 Sub-section 1.4-8.2.2 At the initial evaluation of a seat an assessment of the limiting conditions ofuse is made and, when agreed with the seat manufacturer, these are specifiedon the General Arrangement drawing, on the Declaration of Design andPerformance (DDP) or specifically highlighted in a letter of approval.Included in these limitations is a minimum seat pitch at which approval forinstallation on an aeroplane has been granted. This minimum pitch is definedtaking into account head, trunk and leg strike areas of the seat in front, theability to occupy the seat and, if necessary, quickly vacate the seat and enterthe aisle in an emergency.2.3 The Director-General has been asked to re-assess the use of seats at a pitchless than that has generally been requested in the past, particularly withrespect to the more modern, high technology seat designs, and yet still to besatisfied that the various general criteria above are being achieved. Ofparticular concern is the effect that such lower seat pitches can have on theseat occupancy and the ease of egress from these seats.2.4 To formalise the minimum acceptable seating standards the normal designextremes used for certification purposes for all occupied zones, (namely theanthropometric data for the 5th percentile female to the 95th percentile male),have been taken into account. In this regard the critical dimension for theAN-64 P.130 May 2006