| AD Number | 80-24-02 | Status | Active |
| Effective Date | November 20, 1980 | Issue Date | Not specified |
| Docket Number | Unknown | Amendment | 39-3973 |
| Product Type | ["Aircraft"] | Product Subtype | ["Small Airplane"] |
| CFR Part | --- - Part 39 | CFR Section | N/A |
| Citation | This information is not available. | ||
| Manufacturer(s) | Viking Air Limited |
| Model(s) | DHC-2 Mk.I DHC-2 Mk.II DHC-2 Mk.III |
80-24-02 DEHAVILLAND: Amendment 39-3973. Applies to all model DHC-2 aircraft.
Compliance is required as indicated.
To preclude wing/aileron flutter due to cracks and loose rivets in the aileron differential mount structures (located in the forward cabin roof), when combined with loose control cables or improperly balanced ailerons, accomplish the following:
(a) On airplanes in which the aileron differential mount structure incorporates channel P/N C2CF623ND, within the next 100 hours in service, unless already accomplished within the last 500 hours in service, and thereafter at intervals not exceeding 600 hours in service, inspect channel P/N C2CF623ND and angles P/N C2CF627ND/628ND for damage, cracks and loose rivets. Repair, if necessary in accordance with DeHavilland Aircraft of Canada, Limited, Engineering Service Bulletin Series "B". No. 28 supplement dated March 22, 1963, or an FAA approved equivalent.
(b) On airplanes in which the aileron differential mount structure incorporates channel P/N C2CF1265ND, within the next 100 hours in service, unless already accomplished, inspect, repair and modify in accordance with the DeHavilland Aircraft of Canada, Limited, Engineering Bulletin Series "B", No. 28 dated March 1, 1963, or an FAA approved equivalent.
(c) On all airplanes, within the next 100 hours in service, unless already accomplished, ensure that the aileron cable tension is in accordance with the DeHavilland Aircraft of Canada, Limited, Service Bulletin No. 2/27, Revision A, dated August 15, 1980, and that the aileron is balanced within the limits contained in the DHC-2 repair manual, or an FAA- approved equivalent.
(d) Equivalent inspections, alterations and replacement parts must be approved by the Chief, Engineering and Manufacturing Branch, FAA, Eastern Region.
(e) Upon submission of substantiating data by an owner or operator through an FAA Maintenance Inspector, the Chief, Engineering and Manufacturing Branch,FAA, Eastern Region, may adjust the compliance times specified in this AD.
This amendment supersedes AD 63-16-02.
This amendment is effective November 20, 1980.