AD/EMB-120/27 Amdt 3 - Icing Conditions
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Embraer EMB-120 (Brasilia) Series Aeroplanes
AD/EMB-120/27 Amdt 3 (Continued)
12. Modify the low speed aural/visual alarm system to permit inhibition of the alarm when landing gear is down and locked or cancellation of the aural alarm by flight crew in accordance with SB 120-30-0033 Rev 03.
13. Remove all Aircraft Flight Manual (AFM) revisions/amendments introduced by Amendment 1 or 2 of this Directive and ensure that AFM-120/813 has Revision 70 incorporated.
Note 2: Brazilian DAC AD 2001-05-02R2 Amdt 39-924 and AD 2001-0502R2 Errata refer.
Compliance: Requirement 1 - Not applicable.
Requirement 2 - Not applicable.
Requirement 3 - Remains unchanged, as ‘Within 400 hours TIS or 180 days from the effective date of the original issue of this Directive whichever is later’.
Requirement 4 - No later than 28 June 2002.
Requirement 5 - No later than 28 June 2002. Requirement 6 - Not applicable.
Requirement 7 - Not applicable. Requirement 8 - Not applicable. Requirement 9 - Not applicable. Requirement 10 - Not applicable. Requirement 11 - Not applicable.
Requirement 12 - No later than 28 June 2002.
Requirement 13 - Within seven days from the effective date of this Directive. This Amendment becomes effective on 23 May 2002.
Background: The Brazilian Departamento de Aviação Civil (DAC) received reports of loss of control events when flying in icing conditions, indicating that flight crew can misjudge both the severity of ice accretion and the need to take immediate action to prevent excessive loss of airspeed, especially when using the autopilot. The original issue of this Directive imposed operational limitations in the AFM, together with installation of placards in the cockpit, and removal of the deice boots “light- heavy” switch.