# AD 59-12-08: Fire Extinguisher Spray Pipe

- Type: Airworthiness directive
- Status: Current
- Products: de Havilland Aircraft Co., Ltd., The D.H. 104 Dove Series 1A, D.H. 104 Dove Series 2A, D.H. 104 Dove Series 5A, D.H. 104 Dove Series 5BA, D.H. 104 Dove Series 6A, D.H. 104 Dove Series 6BA, D.H. 104 Dove Series 7A, D.H. 104 Dove Series 7AXC, D.H. 104 Dove Series 8A and D.H. 104 Dove Series 8AXC
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Registered aircraft: 3 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/3CC4AC93A2E2EB3D86256A34006C0777.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/59-12-08

## The airworthiness directive

59-12-08 de HAVILLAND: Applies to All Model 104 "Dove" Aircraft.

Compliance required not later than July 20, 1959.

A case has been reported where a powerplant fire extinguisher spray pipe P/N 4M-99ND had been installed without having the spray holes drilled in it.

  (1) Spray pipe P/N 4M99ND must be inspected to ascertain whether it has the spray holes drilled in it as follows:

  (a) Open the engine cowlings and inspect the spray pipe running from the distributor unit round the blower casing.

  (b) If the pipe has not had the spray holes drilled in it remove the pipe and replace with a serviceable item; or

  (c) The unserviceable pipe may be rendered serviceable by working to the details shown in de Havilland Technical News Sheet CT (104) No. 163.

  (2) The above inspection, and replacement or rework action where necessary, must be accomplished on all spare powerplants and spares stock before installation in aircraft.

The British Air RegistrationBoard considers this mandatory. (de Havilland TNS CT (104) No. 163 covers the same subject.)

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A-807](https://openairdocs.org/tcds/A-807): Acro Aeronautical Services Ltd; names 10 of 10 models: D.H. 104 Dove Series 8A, D.H. 104 Dove Series 7A, D.H. 104 Dove Series 1A, D.H. 104 Dove Series 5A, D.H. 104 Dove Series 7AXC, D.H. 104 Dove Series 8AXC, D.H. 104 Dove Series 2A, D.H. 104 Dove Series 5BA…

## 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: 3 (3 by airframe model, 0 by engine model)
- Makers: Dehavilland 3

Models with the most aircraft:

- [Dehavilland DH104 DOVE 6A](https://openairdocs.org/model/dehavilland-dh104-dove-6a): 3 aircraft (airframe model)

All 1 models: https://openairdocs.org/ad/59-12-08/models.md
Every aircraft: https://openairdocs.org/ad/59-12-08/aircraft.md

Its text cites no advisory circulars or STCs.

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