# AD 87-03-03: Valves

- Type: Airworthiness directive
- Status: Current
- Products: British Aerospace Regional Jetstream Series 3101
- Effective: February 17, 1987
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small/large airplane
- Amendment: 39-5504
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/41D371E5F5F2BB6E862569F1006BDB3F.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/87-03-03

## The airworthiness directive

87-03-03 BRITISH AEROSPACE: Amendment 39-5504. Applies to Model 3101 Jetstream (S/N 642 to 646, 648 to 655, 657, 658 and 660 to 666 inclusive) airplanes certificated in any category.

Compliance: Required within 600 hours time-in-service (TIS) after the effective date of this AD, unless already accomplished.

To ensure operation of fuel/hydraulic and water methanol system valves during critical flight operations, accomplish the following:

  (a) Modify the HiTemp Valves Part Number (P/N) HTE 4925-001 as follows:

  (1) Gain access to the valves in accordance with Section 2. "ACCOMPLISHMENT INSTRUCTIONS", paragraph A PREPARATION", in British Aerospace (BAe) S/B 28-JA850911 dated June 13, 1986.

  (2) Replace valve spindles P/N 4925-005 with strengthened spindles P/N 4925-013 in HiTemp Model HTE 1" Actuated Ball Valves in accordance with Section 2. "ACCOMPLISHMENT INSTRUCTIONS" in HiTemp SB HTE 4925/1-SB-1 dated August 19, 1985, on those valves located as follows:(i) Fuel system - left and right LP cocks at wing leading edges outboard of the engines, and crossfeed cock on fuselage center section.

    (ii) Hydraulic System - left and right LP cocks in the hydraulic installations below fuselage center section.

    (iii) Water Methanol System (if fitted) - stop valves in the left and right main landing gear bays.

  (3) Carry out functional tests of the valves in accordance with Section 2. "ACCOMPLISHMENT INSTRUCTIONS", paragraph B "ACCOMPLISHMENT", in BAe S/B 28-JA850911 dated June 13, 1986.

  (b) Aircraft may be flown in accordance with Federal Aviation Regulation 21.197 to a location where this AD can be accomplished.

  (c) An equivalent means of compliance with this AD may be used if approved by the Manager, Aircraft Certification Staff, AEU-100, Europe, Africa, and Middle East Office, FAA, c/o American Embassy, B-1000, Brussels, Belgium.

All persons affected by this directive may obtain a copy of the document referredto herein upon request to British Aerospace plc, Manager, Product Support Civil Aircraft Division, Prestwick Airport, Ayrshire, KA9 2RW, Scotland; or British Aerospace, Inc., Librarian, Box 17414, Dulles International Airport, Washington, D.C. 20041; or FAA, Office of the Regional Counsel, Room 1558, 601 East 12th Street, Kansas City, Missouri 64106.

This amendment becomes effective on February 17, 1987.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A21EU](https://openairdocs.org/tcds/A21EU): British Aerospace Regional Aircraft; names 1 of 3 models: Jetstream Series 3101

## 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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