# AD 86-18-08: Co-Axial Connectors

- Type: Airworthiness directive
- Status: Current
- Products: Short Brothers SD3-30 and SD3-60
- Effective: September 11, 1986
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Large airplane
- Amendment: 39-5388
- Registered aircraft: 30 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/799BD899AD261EC1862569F300680BB9.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/86-18-08

## The airworthiness directive

86-18-08 SHORT BROTHERS PLC: Amendment 39-5388. Applies to Models SD3-30 and SD3-60 airplanes listed in Short Brothers PLC Service Bulletins SD3-28-22, Revision 2, dated July 1985 (for Model SD3-30 airplanes), and SD360-28-06, Revision 2, dated July 1985 (for Model SD3-60 airplanes), certificated in any category. Compliance is required within 90 days after the effective date of this AD. To prevent erroneous or erratic fuel quantity indications caused by moisture ingress into the fuel tank gauging system co-axial connectors, accomplish the following, unless previously accomplished:

A. Seal the affected co-axial connectors in accordance with Short Brothers PLC, Service Bulletins SD3-28-22, Revision 2, dated July 1985, for Model SD3-30 airplanes, and SD360-28-06, Revision 2, dated July 1985, for Model SD3-60 airplanes.

B. An alternate means of compliance or adjustment of the compliance time, which provides an acceptable level of safety, may be used when approved by the Manager, Standardization Branch, ANM-113, FAA, Northwest Mountain 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/or modifications required by this AD.

All persons affected by this directive who have not already received the appropriate service documents from the manufacturer may obtain copies upon request to Shorts Aircraft, 1725 Jefferson Davis Highway, Suite 510, Arlington, Virginia 22202. These documents may be examined at the FAA, Northwest Mountain Region, 17900 Pacific Highway South, Seattle, Washington, or the Seattle Aircraft Certification Office, 9010 East Marginal Way South, Seattle, Washington.

This amendment becomes effective September 11, 1986.

## 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: 30 (30 by airframe model, 0 by engine model)
- Makers: Short Bros 27, Short Bros. & Harland 3

Models with the most aircraft:

- [Short Bros SD3-60](https://openairdocs.org/model/short-bros-sd3-60): 26 aircraft (airframe model)
- [Short Bros. & Harland SD3-30](https://openairdocs.org/model/short-bros-harland-sd3-30): 3 aircraft (airframe model)
- [Short Bros SD3-30](https://openairdocs.org/model/short-bros-sd3-30): 1 aircraft (airframe model)

All 3 models: https://openairdocs.org/ad/86-18-08/models.md
Every aircraft: https://openairdocs.org/ad/86-18-08/aircraft.md

Its text cites no advisory circulars or STCs.

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