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

(c)(d)During service, seat covers become contaminated with perspirationwhich leaves a deposit of body salts, etc. These deposits mayaccumulate, impairing the flame resistance properties of the materials.Disinfectants, etc., are often sprayed from aerosol containers in aircraftcabins. The accumulation of these agents may also affect the longterm flame resistant properties of the furnishing materials.3.2 Operators and maintenance organisations are reminded, therefore, that theymust have adequate control over the cleaning of aircraft furnishing materials.For this, they need to have a knowledge of the material type, therecommended cleaning or proprietary finishing processing methods, theeffects of time in service on the flame resistance properties, the flameretardant processes applied, if any, and the method of re-application of such aprocess, where this is necessary. It is not acceptable to place reliance onunsubstantiated claims concerning the continuance of flame resistantproperties of a material after durability or additional flame retarded processeshave been applied. Where such processes have been applied, there is a needto prove the continued acceptability of a particular material or process inservice, and, therefore, further flame resistance tests must be conducted inaccordance with requirements identified in paragraph 1.2 of this Notice and,where applicable, Airworthiness Notice No. 59.4 CancellationThis Notice cancels Notice No.58, Issue 4, dated 31 May 2003, which should bedestroyed.Norman LODirector-General of Civil Aviation30 September 2006 AN-58 P.2