# AD 85-12-03: Engine Fuel Drain System

- Type: Airworthiness directive
- Status: Current
- Products: Viking Air DHC-7-1, DHC-7-100, DHC-7-101, DHC-7-102 and DHC-7-103
- Effective: July 5, 1985
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Large airplane
- Amendment: 39-5074
- Registered aircraft: 7 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/4BB1D828649C05E8862569EC006098B7.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/85-12-03

## The airworthiness directive

85-12-03 DeHAVILLAND: Amendment 39-5074. Applies to DeHavilland Model DHC-7 series airplanes, serial numbers (S/N) 3 thru 86, 89, 91, 94, and 95, certificated in all categories. To preclude the occurrence of a ground fire caused by engine fuel impinging on landing gear brakes under certain wind conditions, accomplish the following, unless already accomplished:

A. Within the next nine months after the effective date of this AD, accomplish a modification of the engine fuel drain system in accordance with Modification No. 7/2175 and DeHavilland Service Bulletin 7-71-18, Revision A, dated January 20, 1984.

B. Alternate means of compliance which provide an acceptable level of safety may be used when approved by the Manager, New York Aircraft Certification Office, FAA, New England Region.

C. Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a base for the accomplishment of inspections and modifications required by this AD.

This amendment becomes effective July 5, 1985.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A20EA](https://openairdocs.org/tcds/A20EA): De Havilland Aircraft of Canada Limited; names 5 of 5 models: DHC-7-101, DHC-7-103, DHC-7-102, DHC-7-100, DHC-7-1

## 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: 7 (7 by airframe model, 0 by engine model)
- Makers: Dehavilland 7

Models with the most aircraft:

- [Dehavilland DHC-7-102](https://openairdocs.org/model/dehavilland-dhc-7-102): 5 aircraft (airframe model)
- [Dehavilland DHC-7-103](https://openairdocs.org/model/dehavilland-dhc-7-103): 2 aircraft (airframe model)

All 2 models: https://openairdocs.org/ad/85-12-03/models.md
Every aircraft: https://openairdocs.org/ad/85-12-03/aircraft.md

Its text cites no advisory circulars or STCs.

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