# AD 76-13-06: Lightning Protection

- Type: Airworthiness directive
- Status: Current
- Products: Viking Air DHC-6-1, DHC-6-100, DHC-6-200 and DHC-6-300
- Effective: July 6, 1976
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-2654
- Registered aircraft: 88 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/D83B786ABFA002BD86256A38004B4ED1.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/76-13-06

## The airworthiness directive

76-13-06 DEHAVILLAND: Amendment 39-2654. Applies to DeHavilland Model DHC- 6 series Twin Otter aircraft serial nos. 1 thru 430 incorporating wing tip strobe lighting.

Compliance required as indicated:

To restore the aircraft lightning strike protection to its original status, as a result of excessive removal of lightning strike protection bonding strap material, during the installation of the wing tip strobe lights, accomplish the following:

  (a) Within the next 100 hours in service after the effective date of this AD, accomplish the alteration to the aircraft wing tips in accordance with "Accomplishment Instructions" in DeHavilland DHC-6 Service Bulletin No. 6/318, dated January 3, 1975, or later revision, or equivalent alteration approved by the Chief, Engineering and Manufacturing Branch, FAA Eastern Region.

  (b) Upon request with substantiating data submitted through an FAA inspector, the compliance time specified in this AD may be increased by the Chief, Engineering and Manufacturing Branch, FAA Eastern Region.

This amendment is effective July 6, 1976.

## 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/76-13-06/models.md
Every aircraft: https://openairdocs.org/ad/76-13-06/aircraft.md

Its text cites no advisory circulars or STCs.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.