# Presentation: 843686

## AIRCRAFT ENGINEERING/DATA PACKAGES

- Bill Schinstock
- Wichita Aircraft Certification Office

- Presentation 6

## Part 91 Appendix GOperations in RVSM Airspace

- Section 1	Definitions
- RVSM Group Aircraft
- RVSM Non-group aircraft
- RVSM Full and Basic Flight Envelopes
- Section 2	Aircraft Approval
- (b)   Aircraft Engineering Data Package Content
- (c)	  Required Aircraft Altitude-keeping Equipment
- (d)   Altimetry System Error (ASE) Containment for pre-April 9, 1997 aircraft

## Appendix G Content 

- (e)   ASE Containment for post-April 9, 1997 aircraft
- (f)    ASE Containment for Non-group aircraft
- (g)   TCAS II Compatibility with RVSM Operations
- (h)   Administrator finding  of compliance

## 91-RVSM Guidance 

- 91-RVSM Reference Paragraphs
- Appendix 7:	Table of Contents
- Paragraph 6:	Approval Process
- Paragraph 7:	RVSM Performance Requirements
- Paragraph 8:	Aircraft Systems
- Paragraph 9:	Airworthiness Approval
- Appendix 1:	Explanation of W/
- Appendix 2:	Altimetry System Error Components
- Appendix 3:	Establishing and Monitoring Static 	Source Errors

## 91-RVSM Guidance  (cont.)

- Manufacturers and Design Organizations use part 91
- 	Appendix G and supporting 91-RVSM guidance to:
- Gain Aircraft Certification Office approval of RVSM Data Package containing data and analysis justifying RVSM Airworthiness Approval for group and non-group aircraft
- Gain ACO approval, **for in-service aircraft**, of SB, SL or STC to be applied by operators to bring aircraft into RVSM compliance (i.e., required inspections and/or modifications)
- Gain ACO approval, **for new-build aircraft**, of statements of RVSM eligibility in Airplane Flight Manual and/or Type Certificate Data Sheet (TCDS)

## Aircraft Approval Requirements

- Aircraft may be approved to RVSM requirements as: Group aircraft or Non-group aircraft
- Must meet Appendix G minimum aircraft equipage requirements
- Required aircraft avionics systems must meet Appendix G  performance tolerances
- Continued airworthiness instructions must be provided, if found necessary

## Aircraft Approved for World-wide Operations

- RVSM compliant aircraft are eligible for RVSM operations world-wide
- FAA and JAA aircraft approval criteria established for world-wide approvals
- Assumptions such as high density traffic used in criteria development

## Approval Objective

- 	The objective of airworthiness approval for  RVSM operations is to demonstrate that the design and manufacture of the aircraft, its systems, and their installation can meet the performance criteria necessary for RVSM operation, as defined in Part 91 Appendix G.

## Basis of RVSM Airworthiness Approval

- The altimetry system performance for any aircraft is governed by the appropriate certification requirements
- i.e., FAR/JAR 25.1325, "Static Pressure Systems.”
- RVSM airworthiness approval is in addition to the requirements defined by the aircraft's certification basis.

## Airworthiness Approval

- Airworthiness authorities (e.g.,  ACOs) have approved RVSM data packages for most aircraft types.
- The data packages:
- Identify the approved aircraft type or group
- Detail how the manufacturer has verified the altimetry system performance

## Minimum Equipment for RVSM Operations

- Two independent altitude measurement systems
- Each system should be composed of the following elements:
- Cross-coupled static source system
- Static source error correction (SSEC), if needed to meet the ASE requirements
- An altitude alert system
- An automatic altitude control system
- Note:   Altitude reporting transponder equipage required by 91.215.

## Equipment Tolerances(Reference Appendix G)

_**ASE Requirements**__**	**__**	**__**Basic Envelope**__**	**__**	**__**	**_**        **_**Full Envelope**_
- _Group Aircraft_	[Mean ASE of the group] _<_80 ft (25m)	        _<_120 ft (37m)
- 	(pre April 1997) 	[Mean ASE + 3SD] _<_200 ft (60m)		        _<_245 ft (75m)
- _Group Aircraft_		        N/A         _	__	_        [Mean ASE]  _<_80 ft (25m)
-     (post April 1997) 		        N/A  _	__	_       [Mean ASE + 3SD] _<_200 ft (60m)
- _Non-group Aircraft_	[Residual static source error + 		   	 _<_200 ft (60m)
- 					worst case avionics] 	_<_160 ft (50m)
- ALTITUDE ALERT LIMIT:  _+_300 ft Altitude Deviations
- 	Aircraft applying for type certification after April 1997:  ±200 ft
- AUTOMATIC ALTITUDE CONTROL SYSTEM:  _+_65 ft (20m) about acquired altitude		Note:  For aircraft type certified prior to April 1997, FMS/PMS system with _+_ 130 ft 		variations allowed

## Definition of Flight Envelopes

- FAA/JAA documents evaluate ASE requirements against
-  the basic flight envelope and the full envelope

- Full RVSM Envelope

## Definition of Flight Envelopes

- Basic RVSM Envelope
- Same as full envelope except upper Mach boundary
- Upper Mach boundary not less than long range cruise plus 0.04 Mach
- Note: Basic envelope is not applicable to post April 1997   	  group aircraft

## TCAS II, Version 7.0

- Appendix G amended in December 2001:
- 	"After March 31, 2002, _unless otherwise authorized by the Administrator_, _**if you operate an aircraft that is equipped with TCAS II in RVSM airspace,**_ it must be a TCAS II that meets TSO C-119b (Version 7.0), or a later version.”
- Applicable to US-registered aircraft, _not_ FAA controlled oceanic airspace

## Operator Documents

- For operator action, aircraft  RVSM compliance documents have taken the form of:
- _For In-service Aircraft_
- Manufacturers’ Service Bulletins and Letters
- Supplemental Type Certificates
- Aircraft Service Change for Gulfstream aircraft
- _For New-production aircraft_ manufactured in compliance with Appendix G
- Statement of Compliance in AFM and/or TCDS
- All documents approved by Aircraft Certification Offices

## Aircraft Engineering Package Availability

- Access FAA RVSM Website (_http://www.faa.gov/ats/ato/rvsm1.htm)_
- Access RVSM Documentation page
- Find Aircraft Engineering Packages under:
- Small Commercial/General Aviation Aircraft Docs
- Large Transport Documentation
- Find Aircraft Manufacturer Contacts under “Contacts”

## Aircraft Certification Webpage

- Located on RVSM Documentation Webpage
- Lists ACO Contacts, Frequently Asked Questions, Regulations, Guidance and Policy Letters