- Effective
- December 30, 1967
- Published
- December 30, 1967
- 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
- 39-529
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 | 21 KB | 1e0426f3…a6c76e6 | FAA DRS (API key needed) |
On this page
The airworthiness directive
67-33-01 de HAVILLAND AIRCRAFT: Amdt. 39-529, Part 39, Federal Register December 30, 1967. Applies to Type DHC-6 Airplanes Incorporating Grimes 41905-1 Anti- Collision Light.
Compliance required as indicated.
To prevent the occurrence of a hazardous condition, caused by the noncompliance of the Grimes 41905-1 Anti-Collision Light, accomplish the following:
(a) Within the next 50 hours' time in service after the effective date of this AD, unless already accomplished, install the following placard in full view of the pilot: "AIRCRAFT LIMITED TO DAY VFR FLIGHT ONLY."
(b) The placard required by paragraph (a) may be removed when the light is replaced by the Grimes G8400A-24 Anti-Collision Light in accordance with the "Procedure" outlined in de Havilland Modification No. 6/1116, dated October 26, 1967, or later revision or equivalent installation approved by the Chief, Engineering and Manufacturing Branch, FAA Eastern Region.
(c) Upon request with substantiatingdata submitted through an FAA maintenance inspector, the compliance time specified in this AD may be increased by the Chief, Engineering and Manufacturing Branch, FAA Eastern Region.
This amendment effective December 30, 1967.
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