AIC TANZANIA CIVIL AVIATION AUTHORITY by fdh56iuoui

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									                           UNITED REPUBLIC OF TANZANIA
                      TANZANIA CIVIL AVIATION AUTHORITY
                             Aeronautical Information Services
                       AERONAUTICAL INFORMATION CIRCULAR
  P.O. Box 2819, DAR ES SALAAM.
  FAX:     255-22-2118905                                                             AIC
  PHONE: 255- 22- 2115079/80, 2111951.                                               4/2003
  AFTN: HTDQYOYO                                                                    (Pink 32)
  Email: tccaa@tcaa.go.tz                                                        23 January 2003
  Website:http//www.tcaa.go.tz
      The following circular is promulgated for information, guidance and necessary action.

                                         M. Munyagi
                                      Director General

                                  AIRCRAFT EQUIPMENT

                         GROUND PROXIMITY WARNING SYSTEM

1.1    In view of the concern over the continued occurrence of controlled flight into
       terrain (CFIT) accidents, a major accident prevention activity is taking place on a
       worldwide basis, and the International Civil Aviation Organization (ICAO) is
       working on the development of a program for the prevention of controlled flight
       into terrain.

1.2    In this respect, carriage of ground proximity warning systems (GPWS) in flight
       operations has been expanded since 1 January 1999 in respect of commercial
       air transport operation and general aviation operation as follows:

1.3    In order to comply with the safety requirements, the Tanzania Civil Aviation
       Authority requires that for :

       (a)     Commercial air transport operation:

               (i)      that all Tanzania registered turbine-engined aeroplanes of a
                        maximum certificated take-off mass in excess of 5,700 kg or
                        authorized to carry more than nine passengers shall be equipped
                        with a ground proximity warning system.

               (ii)     It is recommended that the ground proximity warning system in the
                        aeroplane have a predictive terrain hazard warning function.
                        However, all turbine-engined aeroplanes of a maximum certificated
                        take-off mass in excess of 15,000 kg or authorized to carry more
                        than 30 passengers shall be equipped with a ground proximity
                    warning system which has a predictive terrain hazard warning
                    function.

      (b)   General aviation operation (non-commercial air transport operation)

            (i)     that all Tanzania registered turbine-engined aeroplanes of a
                    maximum certificated take-off mass in excess of 5,700 kg or
                    authorized to carry more than nine passengers shall, for which the
                    individual certificate of airworthiness is first issued on or after 1
                    January 2004, be equipped with a ground proximity warning system
                    which has a forward looking terrain avoidance function.

            (ii)    From 1 January 2007, all Tanzania registered turbine-engined
                    aeroplanes of a maximum certificated take-off mass in excess of
                    5,700 kg or authorized to carry more than nine passengers, shall be
                    equipped with a ground proximity warning system which has a
                    forward looking terrain avoidance function.

            (iii)   It is recommended that all Tanzania registered turbine-engined
                    aeroplanes of a maximum certificated take-off mass of 5,700 kg or
                    less and authorized to carry more than five but not more than nine
                    passengers should be equipped with a ground proximity warning
                    system which has a forward looking terrain avoidance function.

1.4   It is recommended that all piston-engined aeroplanes of a maximum certificated
      take-off mass in excess of 5,700 kg or authorized to carry more than nine
      passengers should be equipped with a ground proximity warning system which
      has a forward looking terrain avoidance function.

1.5   Unwanted ground proximity warnings are known to have occurred and the lack of
      warning time available in early and unmodified GPWS equipment. The provision
      of superior equipment with improved warning envelopes, less subject to
      unwanted warnings, greatly enhances the probability of necessary recovery
      action in the event of a GPWS warning.

1.6   The ground proximity warning system (GPWS) shall provide automatically a
      timely and distinctive warning to the flight crew when the aeroplane is in
      potentially hazardous proximity to the earth's surface.

1.7   A ground proximity warning system shall provide, as a minimum, warnings of the
      following circumstances:

      (a)   excessive descent rate;
      (b)   excessive terrain closure rate;
      (c)   excessive altitude loss after take-off or go around;
      (d)   unsafe terrain clearance while not in landing configuration



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      (e)   (i)   gear not locked down,
            (ii)  flaps not in landing position
      (f)   Excessive descent below the instrument glide path.

1.8   The above provisions have been incorporated in the amended Air Navigation
      Regulations awaiting final approval.



Cancel AIC 49 / 2000




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