# AD 87-25-11: Bearing Installations

- Type: Airworthiness directive
- Status: Current
- Products: BAE Systems HS 748 Series 2A and HS 748 Series 2B
- Effective: January 25, 1988
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Large airplane
- Amendment: 39-5798
- Registered aircraft: 2 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/91FE3BA26B2EB28F862569EB00637157.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/87-25-11

## The airworthiness directive

87-25-11 BRITISH AEROSPACE: Amendment 39-5798. Applies to all Model H.S. 748 series airplanes, as listed in the BAe Service Bulletin 27/110, dated November 1986, certificated in any category. Compliance is required within 60 days after the effective date of this AD unless previously accomplished.

To prevent interference caused by loose bearings, accomplish the following:

A. Inspect the bearing installations of the rudder spring tab, flap torque shaft assemblies, and flap interference roller in accordance with BAe Service Bulletin 27/110, dated November 1986. Any bearing installation found to be loose must be repaired prior to further flight, in accordance with the BAe service bulletin.

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 proposal who have not already received the appropriate service documents from the manufacturer may obtain copies upon request to British Aerospace, Librarian for Service Bulletins, P.O. Box 17414, Dulles International Airport, Washington, D.C. 20041. These documents may be examined at the FAA, Northwest Mountain Region, 17900 Pacific Highway South, Seattle, Washington, or at the Seattle Aircraft Certification Office, 9010 East Marginal Way South, Seattle, Washington.

This amendment becomes effective January 25, 1988.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A24EU](https://openairdocs.org/tcds/A24EU): BAE Systems (Operations) Limited; names 2 of 2 models: HS 748 Series 2B, HS 748 Series 2A

## 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: 2 (2 by airframe model, 0 by engine model)
- Makers: British Aerospace 2

Models with the most aircraft:

- [British Aerospace HS-748-2A](https://openairdocs.org/model/british-aerospace-hs-748-2a): 2 aircraft (airframe model)

All 1 models: https://openairdocs.org/ad/87-25-11/models.md
Every aircraft: https://openairdocs.org/ad/87-25-11/aircraft.md

Its text cites no advisory circulars or STCs.

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