Propellers - Variable Pitch - Dowty Roto
Propellers - Variable Pitch - Dowty Rotol
Propellers - Variable Pitch - Dowty Rotol
| AD/PR/38 | Propeller Electronic Controller | 3/2008 TX |
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| Applicability: | Propeller Electronic Controller Part No. 699018002 with the following serial numbers:- 1488,1489, 1490, 1494, 1495, 1496, 1498, 1499, 1500, 1501, 1502, 1503, 1504, 1505, 1506, 1508, 1509, 1510, 1511, 1512, 1513, 1514, 1515, 1516, 1517, 1518, 1519, 1520, 1521, 1522, 1527, 1528, 1529, 1530, 1531, 1532, 1537, 1538, 1541, 1542, 1543, 1544, 1549, 1550, 1567, 1569, 1570, 1571, 1572, 1573, 1574 and 1581 |
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| Requirement: | 1. If two affected units, listed in the applicability, are installed on one aircraft, remove one unit from service.2. Remove all units identified above from service.3. Replace with a serviceable unit, Part no 699018002, in accordance with the relevant Aircraft Maintenance Manual.4. Once removed, do not refit affected units until the input/output circuit board has been replaced by an organisation approved for the task, in accordance with Alert Service Bulletin D8400-61-A77 dated 14 January 2008.Note 1: These units are known to be fitted to, but not limited to, Bombardier DHC 8-400 aircraft.Note 2: UK CAA AD G-2008-003 refers. |
| Compliance | For Requirement 1. Within 7 days of the effective date of this AD.For Requirement 2. Within 1200 flight hours or 6 months of the effective date of this AD, whichever limit is reached first.For Requirement 3 From the effective date of this Directive.For Requirement 4 From the effective date of this Directive. |
| This Airworthiness Directive becomes effective on 21 January 2008. |
| Background: | The TC holder has identified that, due to a production problem, there is an increased potential for failure of input/output circuit boards fitted to Propeller Electronic Controllers with the above unit serial numbers. Failure could lead to uncommanded propeller speed changes or loss of the autofeather function. |
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Charles Lenarcic
Delegate of the Civil Aviation Safety Authority
18 January 2008