AD/CESSNA 550/15 Amdt 1 - Flap Drain Holes
1AD/CESSNA 550/15 Amdt 1 - Flap Drain Holes
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COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
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Cessna 550 (Citation II) Series Aeroplanes
AD/CESSNA 550/15
Amdt 1
Flap Drain Holes 10/88
Applicability: S550 and 552 S/N S550-0001 to S550-0153 and 552-0001 to 552-0017. Requirement: 1. Action in accordance with Cessna Service Letter SLA S550-57-01.
- Repairs, if necessary, in accordance with Cessna SB S550-57-5.
Note: FAA AD 88-11-07 refers.
Compliance: 1. Prior to further flight after 13 June 1988.
- Must be accomplished prior to further flight for aeroplanes identified as having no drain holes or obstructed drain holes in the flaps by Service Letter SLA
S550-57-01.
Background: There has been an incident where the outboard flap shattered in flight. Investigation revealed that the flap had no drain/vent holes which led to pressurization at altitude. Subsequently, other flaps have been found without drain/vent holes. Amendment 1 states SB that provides repair instructions and spares stock affected.