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Project A6A3-03-01
AS 94900
Aerospace - Flight Control Systems, Design, Installation,
and Test Of Piloted Military Aircraft, General Specification For
Sponsors: Henry Harschburger and Dave Flavell
Background
• There is an industry need for a comprehensive flight control
system specification with details similar to MIL-F-9490 and
lessons learned
• MIL-F-9490D was issued in 1975 and was reaffirmed in 1992
• However, it is still a very useful document. Tailored versions are
being used on the F/A-18, V-22, and RAH-66 Comanche
• Government representatives have agreed to participate with
Committee A-6 in development of an Aerospace Standard for
flight control systems
A-6A3 Sept 03
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Project A6A3-03-01
AS 94900
Scope.
This specification establishes general performance, design,
development and quality assurance requirements for the flight control
systems of military manned piloted aircraft. Flight control systems
(FCS) include all components used to transmit flight control
commands from the pilot or other sources to appropriate force and
moment producers. Flight control commands may result in control of
aircraft flight path, attitude, airspeed, aerodynamic configuration, ride,
and structural modes. Among components included are the pilot’s
controls, dedicated displays and logic switching, transducers, system
dynamic and air data sensors, signal computation, test devices,
transmission devices, actuators, and signal transmission lines
dedicated to flight control. The interfaces of flight control systems with
related subsystems are defined.
A-6A3 Sept 03
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Project A6A3-03-01 AS 94900
MIL-F-9490D will be the baseline,with additional
information and lessons learned from recent
government and industry documents
Major Tasks :
• Assemble an ad-hoc working group
• Provide a Microsoft Word version of MIL-F-9490D to the
working group
• Review MIL-F-9490D
• Status of applicable documents
• Identify sections requiring major updates
• Identify new topics/sections to be added
• Format baseline document in SAE format
• Incorporating changes
• Ballot to Panel
A-6A3 Sept 03
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Project A6A3-03-01
AS 94900
FCS Specification Working Group
• Sponsor
- Henry Harschburger
• NAVAIR
- Shawn Donley, Hank Agnew
• USAF
- Kahtan Awni, Paul Hundley
• Army
- TBD
• Boeing
- Ian Halley
• Northrop Grumman
- Ken Ugowski, Aldo Arena
• Lockheed Martin
- Dave Bodden
• BAE Systems
- Kurt Vieten, Jay Blosser
• Hamilton Sundstrand - Steve Avritch
• HR Textron
- Mark Willians
• Parker Aerospace
- Glenn Zwicker
• Moog
- Dave Flavell, Scott Schaefer
A-6A3 Apr 05
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Project A6A3-03-01
AS 94900
Plan/Tasks:
Because of size of document Flight Control Panel approved change in
balloting process to review document in three major parts - June 2004
1.
2.
3.
4.
5.
6.
Table of contents, cross ref. AS94900 to MIL-F-9490 Fall 2004
Submit Part 1 of the document for ballot.– Fall 2004
Submit Part 2 of the document for ballot. - Spring 2005
Submit Part 3 of the document for ballot. – Summer 2005
Submit the complete document for ballot. - Fall 2005.
Submit Document for Committee A-6 ballot - Early 2006
Status Tasks:
1.
2.
3.
4.
Ballot of Part 1 - Complete Oct 2005
Second draft of Part 1 balloted/approved – Complete 14 Feb 2005
Review of Part 2 by Working Group - Complete 15 Feb 2005
Submit Part 2 for ballot – 1 March 2005
A-6A3 Apr 05
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Project A6A3-03-01 AS 94900
1.0
SCOPE
1.1
1.2
1.3
1.4
1.4.1
2.0
3.0
3.1
3.1.1
3.1.2
3.1.3
3.1.4
3.1.5
3.1.6
3.2
3.2.1
3.2.2
3.2.3
3.2.4
3.3
3.3.1
3.3.2
3.3.3
3.3.4
3.3.5
3.3.6
3.4
3.4.1
3.4.2
3.4.3
3.4.4
3.4.5
3.4.6
Scope
Classification
Flight Control Classification
Flight Control System
FCS Critical Classification
Applicable and Reference Documents
REQUIREMENTS
General System Requirements
Safety and Operability Considerations
Reliability Considerations
Redundancy Considerations
Maintainability Considerations
Survivability Requirements
Electromagnetic Interference
System Performance Requirements
General FCS Performance Requirements
Primary Flight Control System
Secondary Flight Control System
Autopilot Flight Control Functions
System Testability Requirements
System Test and Monitoring Provisions:
Built-In-Test (BIT) Equipment:
Maintenance BIT:
Preflight or Pre-engage BIT:
Preflight Test (BIT) Status Annunciation:
Use of Cockpit Instrumentation
System Design Requirements
System General Design Requirements
Mechanical
Fixed Wing V/STOL Aircraft Requirements
Helicopter Requirements
Electrical
Computational
Part 1
Ballot
10/15/04
and 2/14/05
Part 2
Submit
Ballot
3/1/05
3.5
3.5.1
3.5.2
3.5.3
3.5.4
3.5.5
3.5.6
3.5.7
3.5.8
3.5.6
3.6
3.6.1
3.6.2
3.6.3
3.6.4
3.6.5
3.6.6
3.6.7
4
4.1
4.2
4.3
4.4
4.5
4.6
Subsystem Level Requirements
Subsystem Requirements
Electrical Power Subsystem
Hydraulic Power Subsystem
Pneumatic Power Subsystem
Actuation Subsystems
Trim Subsystem
Artificial Feel Subsystem
Display and Annunciation
Sensors
Component Design and Fabrication
Requirements:
Component General Requirements:
Mechanical Components:
Electrical and Electronic Components:
Assembling:
Component Installation:
Component Fabrication:
Specific Component Requirements:
Quality Assurance Provisions:
General Requirements:
Analysis Requirements:
Software Verification:
Test Requirement:
Qualification (Preproduction) Tests:
Documentation:
Part 3
Plan Incremental Balloting
of Document to Panel
A-6A3 Apr 05
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Project A6A3-03-01
AS 94900
For more information, or to participate, contact:
Shawn Donley
[email protected]
301-342-8522
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