# AD 59-23-03: Fire Extinguisher Cartridge

- Type: Airworthiness directive
- Status: Current
- Products: Maryland Air Industries F-27, F-27A, F-27B, F-27F, F-27G, F-27J and F-27M
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Large airplane
- Registered aircraft: 1 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/6874717E0AC640718625698400723FAD.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/59-23-03

## The airworthiness directive

59-23-03 FAIRCHILD: Applies to F-27 Series aircraft Serial Numbers 1 to 63 inclusive.

Compliance required not later than December 1, 1959.

  (a) The present cartridge unit in the fire extinguisher system has been found to be unreliable above 20,000 feet. Modified cartridge units must therefore be installed to insure reliability above 20,000 feet.

  (b) Remove four Fenwal fire extinguisher cartridge units, P/N 690202-2, attached to main and reserve fire extinguisher bottles located in left and right nacelles, and replace with new Fenwal fire extinguisher cartridge units, P/N 6900202-3.

(Fairchild F-27 Service Bulletin No. 26-1 covers this same subject.)

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS 7A1](https://openairdocs.org/tcds/7A1): Maryland Air Industries Inc.; names 7 of 12 models: F-27, F-27A, F-27M, F-27J, F-27F, F-27B, F-27G

## 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: 1 (1 by airframe model, 0 by engine model)
- Makers: Fairchild 1

Models with the most aircraft:

- [Fairchild F-27F](https://openairdocs.org/model/fairchild-f-27f): 1 aircraft (airframe model)

All 1 models: https://openairdocs.org/ad/59-23-03/models.md
Every aircraft: https://openairdocs.org/ad/59-23-03/aircraft.md

Its text cites no advisory circulars or STCs.

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