# AD 87-26-07: Escape Hatch Locking Mechanism

- Type: Airworthiness directive
- Status: Current
- Products: BAE Systems HS 748 Series 2A and HS 748 Series 2B
- Effective: February 1, 1988
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Large airplane
- Amendment: 39-5807
- Registered aircraft: 2 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/667F74B362840E13862569EB0064420D.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/87-26-07

## The airworthiness directive

87-26-07 BRITISH AEROSPACE: Amendment 39-5807. Applies to Model H.S. 748 series airplanes, as listed in British Aerospace Service Bulletin 52/127, dated May 29, 1985, certificated in any category. compliance required within 5 months after the effective date of this AD, unless previously accomplished:

To prevent the loss of the overwing escape hatch during flight, due to improper locking, accomplish the following:

A. Replace the escape hatch locking mechanism with P/N 10D14062 locking mechanism assembly, in accordance with the instructions in British Aerospace Service Bulletin No. 52/127, dated May 29, 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 inspections and/or 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., 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 at 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 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/87-26-07/models.md
Every aircraft: https://openairdocs.org/ad/87-26-07/aircraft.md

Its text cites no advisory circulars or STCs.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.