Applications and Certification Section
19 December 2002
Our Ref 9/97/CtAw/53
NOTIFICATION
OF A CAA AIRWORTHINESS DIRECTIVE
Please be advised that the Civil Aviation Authority has classified compliance with the following action as mandatory for aircraft on the United Kingdom Civil Register.
CAA Airworthiness Directive 003-10-2002
Applicability British Aerospace BAe 146-100, -200 and -300 Series aircraft.
Subject - Description Air Conditioning – To inspect air conditioning sound-attenuating ducts for signs of oil contamination.
Compliance - Requirement
(Summary) Compliance is initially required with BAE
Systems (Operations) Service Bulletin ISB.21-156 at the next “A” check or
within a maximum of 500 flights from 30 November 2002 and repeated at every
subsequent “C” check. The Service
Bulletin requires an inspection of the inside of each of the four air
conditioning sound-attenuating ducts for the presence of oil contamination. This action is required because incidents
have been reported involving impaired performance of the flight crew. At this time, there is no substantiated
evidence indicating that oil breakdown products can impair crew performance,
however, whilst investigations are carried out, oil leaks and cabin/flight deck
odours must be regarded as a potential threat to flight safety.
R J Tew
Airworthiness Directive Co-ordinator