# AD 92-18-02: Electronic Flight Instruments System (EFIS)

- Type: Airworthiness directive
- Status: Current
- Products: BAE Systems ATP
- Effective: November 20, 1992
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Large airplane
- Amendment: 39-8346
- Docket: 92-NM-49-AD
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/F4F9E4C26D4FC7F986256A1D0069EB8C.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/92-18-02

## The airworthiness directive

92-18-02 BRITISH AEROSPACE: Amendment 39-8346. Docket No. 92-NM-49-AD. Applicability: Model ATP series airplanes; serial numbers 2001 through 2045, inclusive; certificated in any category.

Compliance: Required as indicated, unless accomplished previously.

To prevent loss (shut-down) of electronic flight instruments system (EFIS) displays, accomplish the following:

  (a) Within 180 days after the effective date of this AD, install fixed fittings, Modification 10248C, and filter units, Modification 10248A, in the electrical power supplies to the main and side windscreen heater system at the rear of the EFIS control panel, in accordance with British Aerospace Service Bulletin ATP-30-20-10248A/-10248C, Revision 1, dated February 17, 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.

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

  (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 installation shall be done in accordance with British Aerospace Service Bulletin ATP-30-20-10248A/-10248C, Revision 1, dated February 17, 1992, which contains the following list of effective pages:

Page Number Revision Level Date 1-27, 1 February 17, 1992 Odd pages 29 to 97,

99-103

Even pages 28 to 98 (Not used)

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 British Aerospace, PLC, Librarian for Service Bulletins, P.O. Box 17414, Dulles International Airport, Washington, DC. 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 November 20, 1992.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A27NM](https://openairdocs.org/tcds/A27NM): BAE Systems (Operations) Limited; names 1 of 1 models: ATP

## Registered aircraft it may apply to (OpenAirDocs)

No registered aircraft matched the models it names.

Its text cites no advisory circulars or STCs.

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