- Effective
- April 12, 1976
- Models
- DHC-6-1, DHC-6-100, DHC-6-200, DHC-6-300
- Data sheet
- TCDSA9EA
- Registered aircraft
- 88 matched by model
- Product
- Aircraft · Small airplane
- Amendment
- 39-2571
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.
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On this page
The airworthiness directive
76-07-08 DEHAVILLAND: Amendment 39-2571. Applies to all DHC-6 aircraft fitted with Canadian Aircraft Products float models 12000, 12000A or 12000B modified for water bombing operation in accordance with Field Aviation Company, Ltd. Drawing Number 84193.
It has been found that water has been inadvertently entering the water compartments of the aforementioned CAP float models and creating a hazardous condition by exceeding the maximum allowable gross weight with passengers on board.
Compliance required prior to next flight. All aircraft affected by this Airworthiness Directive are no longer eligible for the carriage of passengers or cargo.
Post on the dashboard in full view of the pilot a placard reading "Aircraft Restricted to One Crew Member and Cargo (water) Only in Floats."
The restriction imposed by this Airworthiness Directive may be removed by the incorporation of an acceptable modification approved by the Chief, Engineering and Manufacturing Branch, FAA, Eastern Region.
This amendment is effective April 12, 1976.
Affected TCDS · 1
The type certificate data sheets for the models this AD names, matched by model and maker.
Registered aircraft · 88
Registered aircraft whose airframe or engine model this AD names. Matched by model only, so check each against the AD’s applicability.
| 1966 | 1 |
|---|---|
| 1967 | 5 |
| 1968 | 7 |
| 1969 | 11 |
| 1970 | 2 |
| 1971 | 1 |
| 1973 | 3 |
| 1974 | 6 |
| 1975 | 1 |
| 1976 | 4 |
| 1977 | 6 |
| 1978 | 1 |
| 1979 | 3 |
| 1980 | 5 |
| 1981 | 3 |
| 1982 | 1 |
| 1984 | 1 |
| 1985 | 2 |
25 with no year recorded