# AD 93-16-04: Replace Earth Wires

- Type: Airworthiness directive
- Status: Current
- Products: Short Brothers SD3-SHERPA
- Effective: October 4, 1993
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Large airplane
- Amendment: 39-8661
- Docket: 93-NM-18-AD
- Registered aircraft: 5 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/F7D5823F722C579186256A30006B462C.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/93-16-04

## The airworthiness directive

93-16-04 SHORT BROTHERS, PLC: Amendment 39-8661. Docket 93-NM-18-AD. Applicability: Model SD3-SHERPA series airplanes; serial numbers SH3201 through SH3205 inclusive; certificated in any category.

Compliance: Required as indicated, unless accomplished previously.

To prevent overheating and burning of the earth wires and a resultant fire, accomplish the following:

  (a) Within 6 months after the effective date of this AD, replace the existing 24-gauge earth wires on electrical panels 29C and 30C on the bottom of frame 74 with 16-gauge earth wires, in accordance with Shorts Service Bulletin SD3 SHERPA-24-1, dated May 1992.

  (b) An alternative method of compliance or adjustment of the compliance time that provides an acceptable level of safety may be used if approved by the Manager, Standardization Branch, ANM-113, FAA, Transport Airplane Directorate. Operators shall submit their requests through an appropriate FAA Principal Maintenance Inspector, who may add comments and then send it to the Manager, Standardization Branch, ANM-113.

NOTE: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Standardization Branch, ANM-113.

  (c) Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate the airplane to a location where the requirements of this AD can be accomplished.

  (d) The replacement shall be done in accordance with Shorts Service Bulletin SD3 SHERPA- 24-1, dated May 1992. This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR Part 51. Copies may be obtained from Short Brothers, PLC, 2011 Crystal Drive, Suite 713, Arlington, Virginia 22202-3719. Copies may be inspected at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington; or at the Office of the Federal Register, 800 North Capitol Street, NW., suite 700, Washington, DC.

  (e) This amendment becomes effective on October 4, 1993.

## 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: 5 (5 by airframe model, 0 by engine model)
- Makers: Short Brothers 5

Models with the most aircraft:

- [Short Brothers SD3 SHERPA](https://openairdocs.org/model/short-brothers-sd3-sherpa): 5 aircraft (airframe model)

All 1 models: https://openairdocs.org/ad/93-16-04/models.md
Every aircraft: https://openairdocs.org/ad/93-16-04/aircraft.md

Its text cites no advisory circulars or STCs.

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