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86-21-05: Forward Engine Mounts

FAA order 86-21-05 is an airworthiness directive in force since October 20, 1986. The FAA's subject line: Forward Engine Mounts. It names Hawker Siddeley HS.125 SERIES 700A: about 7 aircraft on the U.S. register today, though an order usually covers particular versions or serial numbers rather than every one. System: engine.

What it applies to as the FAA lists it

Kind of product
Aircraft
Makes
—
Models
BH.125 Series 400A, BH.125 Series 600A, DH.125 Series 1A, DH.125 Series 1A/R-522, DH.125 Series 1A/S-522, DH.125 Series 1A-522, DH.125 Series 3A, DH.125 Series 3A/R, DH.125 Series 3A/RA, DH.125 Series 400A, HS.125 Series 600A, HS.125 Series 700A
On this site
Hawker Siddeley HS.125 SERIES 700A 7 registered

Dates and paperwork

In force since
October 20, 1986
Docket
Unknown
Status
Current
The FAA's document
Read the order on the FAA's site

The order itself the regulatory text, as published

Show the full text (1,465 characters)
86-21-05 BRITISH AEROSPACE: Amendment 39-5418. Applies to BAe Models DH/HS/BH 125 series airplanes equipped with Garrett TFE 731-3R-1H engines, certificated in any category. Compliance is required within 60 days after the effective date of this AD. To prevent failure of the forward engine mounts, accomplish the following, unless previously accomplished: A. Inspect the forward engine mounts and repair, if necessary, in accordance with BAe Service Bulletin 71-38, Revision 1, dated October 4, 1985. 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 the inspections and/or modifications required by this AD. All persons affected by this directive, who have notalready received the appropriate service document from the manufacturer may obtain copies upon request to British Aerospace, Inc., Librarian, Box 17414, Dulles International Airport, Washington, D.C. 20041. This document may be examined at 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 October 20, 1986.

Related safety bulletins advice on the same designs, not orders

2015-09-29NM-15-24 · Landing Gear

Source: FAA Dynamic Regulatory System, airworthiness directives. The FAA's document is the authority; the register counts are this site's, from the FAA register of October 30, 2026. Connections as data: /graph/directive/86-21-05.json · aircraft systems.