- Effective
- November 20, 1980
- Models
- DHC-2 Mk.I, DHC-2 Mk.II, DHC-2 Mk.III
- Data sheet
- TCDSA-806
- Registered aircraft
- 140 matched by model
- Product
- Aircraft · Small airplane
- Amendment
- 39-3973
Unofficial copy of the text in the FAA’s Dynamic Regulatory System. The FAA’s own copy is the authoritative one. DRS record last changed May 30, 2024.
Copies of the files this page was built from, with their SHA-256. Retrieved October 18, 2026.
| File | Size | SHA-256 | Original |
|---|---|---|---|
| FAA DRS HTML | 24 KB | 1984ac9c…0f05d0f | FAA DRS (API key needed) |
On this page
The airworthiness directive
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.
Affected TCDS · 1
The type certificate data sheets for the models this AD names, matched by model and maker.
Registered aircraft · 140
Registered aircraft whose airframe or engine model this AD names. Matched by model only, so check each against the AD’s applicability.
| 1949 | 2 |
|---|---|
| 1951 | 4 |
| 1952 | 9 |
| 1953 | 8 |
| 1954 | 13 |
| 1955 | 9 |
| 1956 | 7 |
| 1957 | 19 |
| 1958 | 7 |
| 1959 | 9 |
| 1960 | 2 |
| 1961 | 2 |
| 1962 | 1 |
| 1963 | 1 |
| 1964 | 5 |
| 1965 | 3 |
| 1966 | 7 |
| 1967 | 3 |
| 1968 | 3 |
26 with no year recorded
By model
Aircraft
NTSB investigations that cite this AD · 1
Their narratives or probable cause name AD 80-24-02, often to say whether the aircraft complied with it.