# AD 87-26-04: DC Power Distribution

- Type: Airworthiness directive
- Status: Current
- Products: BAE Systems BAe 146-100A, BAe 146-200A and BAe 146-300A
- Effective: February 1, 1988
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Large airplane
- Amendment: 39-5804
- Registered aircraft: 8 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/01E070C2A0764B69862569EB006423C1.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/87-26-04

## The airworthiness directive

87-26-04 BRITISH AEROSPACE (BAe): Amendment 39-5804. Applies to Model BAe- 146 series airplanes listed in BAe Service Bulletin 24-30-00757A, Revision 1, dated September 5, 1986, certificated in any category. Compliance is required within 6 months after the effective date of this AD, unless previously accomplished.

To prevent battery depletion and subsequent loss of Essential DC and Emergency DC busbars accomplish the following:

A. Modify the DC power distribution in accordance with British Aerospace BAe-146 Aircraft Modification Service Bulletin 24-30-00757A, Revision 1, dated September 5, 1986.

B. An alternate means of compliance or adjustment of the compliance time, which provides an acceptable level of safety and which has the concurrence of an FAA Principal Maintenance Inspector, 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 21.197and 21.199 to operate airplanes to a base for the accomplishment of the modifications required by this AD.

All persons affected by this directive who have not already received the appropriate service document from the manufacturer may obtain copies upon request to British Aerospace, Inc., Librarian for Service Bulletins, P.O. Box 17414, Dulles International Airport, Washington, D.C. 20041. This document 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 February 1, 1988.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A49EU](https://openairdocs.org/tcds/A49EU): BAE Systems (Operations) Limited; names 3 of 6 models: BAe 146-300A, BAe 146-100A, BAe 146-200A

## 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: 8 (8 by airframe model, 0 by engine model)
- Makers: British Aerospace 8

Models with the most aircraft:

- [British Aerospace BAE 146 SERIES 200A](https://openairdocs.org/model/british-aerospace-bae-146-series-200a): 8 aircraft (airframe model)

All 1 models: https://openairdocs.org/ad/87-26-04/models.md
Every aircraft: https://openairdocs.org/ad/87-26-04/aircraft.md

Its text cites no advisory circulars or STCs.

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