# AD 67-33-01: Anti-collision Light

- Type: Airworthiness directive
- Status: Current
- Products: Viking Air DHC-6-1, DHC-6-100, DHC-6-200 and DHC-6-300
- Effective: December 30, 1967
- Published: December 30, 1967
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-529
- Registered aircraft: 88 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/0F7DE44CDBE0224886256A34006E1598.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/67-33-01

## 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 data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A9EA](https://openairdocs.org/tcds/A9EA): De Havilland Aircraft of Canada Limited; names 4 of 5 models: DHC-6-1, DHC-6-100, DHC-6-200, DHC-6-300

## Registered aircraft it may apply to (OpenAirDocs)

Matched by airframe and engine model; the AD's applicability may narrow it by serial number, part number or equipment.

- Aircraft: 88 (88 by airframe model, 0 by engine model)
- Makers: Dehavilland 84, Dehavilland Acft Of Canada 4

Models with the most aircraft:

- [Dehavilland DHC-6-300](https://openairdocs.org/model/dehavilland-dhc-6-300): 59 aircraft (airframe model)
- [Dehavilland DHC-6-200](https://openairdocs.org/model/dehavilland-dhc-6-200): 19 aircraft (airframe model)
- [Dehavilland DHC-6-100](https://openairdocs.org/model/dehavilland-dhc-6-100): 6 aircraft (airframe model)
- [Dehavilland Acft Of Canada DHC 6-300](https://openairdocs.org/model/dehavilland-acft-of-canada-dhc-6-300): 4 aircraft (airframe model)

All 4 models: https://openairdocs.org/ad/67-33-01/models.md
Every aircraft: https://openairdocs.org/ad/67-33-01/aircraft.md

Its text cites no advisory circulars or STCs.

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