AC 27-1B

Change 1-9

Advisory circular · Certification of Normal Category Rotorcraft

Approved
June 23, 2023
Last reviewed
June 29, 2023
Cancels
AC27-1B Change 8
Family
AC 27-1 · 10 versions
Revision
B, Change 9
14 CFR parts
27
Cited by
1 AD

Guidance, not mandatory unless a rule or AD requires it. DRS record last changed October 23, 2026.

Show pages 1096–1107
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(MANUAL IDENTIFICATION)

RECORD OF REVISIONS

REVISION ISSUE DATE BY REVISION ISSUE DATE BY

NUMBER DATE INSERTED NUMBER DATE INSERTED Original 08/04/97 09/03/97 E. R. THOMAS 1 01/30/98 02/14/98 E. R. THOMAS 2 06/18/98 07/02/98 E. R. THOMAS 10/21/99 11/01/99 E. R. THOMAS 4 08/04/00 08/24/00 E. R. THOMAS REVISION: (PAGE NUMBER) Revision 4 Page iii Page Apdx A - 5

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AC 27-1B, Chg 1 2/12/03 (MANUAL IDENTIFICATION)

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(MANUAL IDENTIFICATION)

LIST OF EFFECTIVE PAGES LIST OF REVISIONS Revision 0 (Original Issue).. August 4, 1997 Revision 1 •January 30,1998 Revision 2 June 18,1998 Revision 3 October 21,1999 Revision 4 August 4, 2000

LIST OF EFFECTIVE PAGES Title Pages Revision No.

COVER i, ii BLANK 4 RECORD OF REVISION iii, iv BLANK 4 LIST OF EFFECTIVE PAGES v THRU vi 4 TABLE OF CONTENTS vii THRU x 4 CHAPTER 1 INTRODUCTION 01-00-00 1 THRU 8 4 CHAPTER 4 AIRWORTHINESS LIMITATION SECTION 04-00-00 1, 2 BLANK 4 CHAPTER 5 INSPECTIONS 05-00-00 1 THRU 4 4 CHAPTER 6 DIMENSION AND ACCESS 06-00-00 1, 2 BLANK CHAPTER 7 LIFTING AND SHORING 07-00-00 1, 2 BLANK 2 CHAPTER 8 LEVELING AND WEIGHING 08-00-00 1, 2 BLANK CHAPTER 9 TOWING AND TAXIING 09-00-00 1, 2 BLANK 2 CHPATER 10 PARKING AND MOORING 10-00-00 1, 2 BLANK 4 CHAPTER 11 PLACARDS AND MARKING 11-00-00 1, 2 BLANK 4 CHAPTER 12 SERVICING 12-00-00 1, 2 BLANK 2 CHAPTERS 20, 51, 60, 70, STANDARD PRACTICES ( )-00-00 1, 2 BLANK CHAPTERS 21, 22, 23, 24, 25, 26, 27, 29, 30, 31, 33, 34, 35, 36, 37, 45, 49, AIRFRAME SYSTEM ( )-00-00 52, 53, 54, 55, 56, STRUCTURES ( )-00-00 62, 63, 64, 65, 66, 67 ROTORS ( )-00-00 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, and 83 POWERPLANT ( )-00-00 1,2,3, 4, 5, 3 6, 7, 8 4 Attachment 1 PART 27 REQUIREMENTS 1, THRU 5, 6 BLANK 4 Attachment 2 INSTRUCTIONS FOR CONTINUED AIRWORTHINESS PROCEDURE INFORMATION 1 AND 2 3 Attachment 3 AT CHAPTER LISTING 1, 2 BLANK 3 Attachment 4 TYPE DESIGN CHANGE ICA RECOMMENDED PROCEDURE 1, THRU 9,10 BLANK 4 REVISION: (PAGE NUMBER) Revision 4 Page v Page Apdx A - 7

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AC 27-1B, Chg 1 2/12/03 (MANUAL IDENTIFICATION)

LIST OF EFFECTIVE PAGES

a. The applicant should provide a means of identifying each page of the Instructions for Continued Airworthiness (ICA) so maintenance personnel know they have a complete and current ICA. There is no requirement for a specific format; however, there is an established standard format that has been used by industry for many years. This standard is the List of Effective Pages.

b. The applicant should list all pages, their revision number and revision date contained in the applicant's ICA on a "List of Effective Pages" page either for the complete manual or by each chapter. If individual chapter method is used, the manual should have a masteriList of Effective Pages page containing all the chapters and their revision numbers.

C. A page means a single side of a leaf within the ICA. When no text is intended for a page the following statement should be on the blank page: THIS PAGE INTENTIONALLY LEFT BLANK. In addition the intentionally left blank page should contain the manual identification, revision number and page number. If a page has not been revised from the original issue, then this will always be designated with a revision number of "O." It is a standard industry practice to list "Revision O" to indicate an original issue page. The revision number will remain the same until ICA is accepted by the FAA/AUTHORTY regardless of the number of draft changes made prior to acceptance.

d. The section that lists multiple chapters and has parentheses ( )-00-00 indicates that the information is applicable to any of those chapters; i.e., Chapters 21, 33, 52, 67, or 71 of the ATA chapter format. The chapter numbers are not sequential because those missing chapters are not applicable to rotorcraft.

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(MANUAL IDENTIFICATION

TABLE OF CONTENTS Identification Title Page CHAPTER 1 INTRODUCTION 01-00-00

1. ACCEPTABLE TO THE FAA/AUTHORITY

2. MANUALS

3. CONTENTS

4. SCOPE

5. PURPOSE

6. ARRANGEMENT

7. SUPERSEDED DOCUMENTS

8. APPLICABILITY

9. DEFINITIONS

10. ABBREVIATIONS

11.ACRONYMS

12. SYMBOLS

13. PRECAUTIONS

14. UNITS OF MEASUREMENT

15. ICA FOR EACH ENGINE

16. ICA FOR EACH ROTOR

17. ICA FOR EACH APPLIANCE REQUIRED BY THIS CHAPTER 4

18. INFORMATION ESSENTIAL TO THE CONTINUED

AIRWORTHINESS OF THE ROTORCRAFT

19. REFERENCED PUBLICATIONS

20. DISTRIBUTION

21. ROTORCRAFT FEATURES

22. CORRECTIONS TO ORIGINAL INSTRUCTIONS FOR

CONTINUED AIRWORTHINESS

23. INDICATING CHANGES TO INSTRUCTIONS FOR

CONTINUED AIRWORTHINESS CHAPTER 4 AIRWORTHINESS LIMITATIONS SECTION 04-00-00

1. AIRWORTHINESS LIMITATIONS INFORMATION

2. NO AIRWORTHINESS LIMITATIONS INFORMATION REQUIRED.

CHAPTER 5 INSPECTION REQUIREMENTS AND OVERHAUL SCHEDULE 05-00-00

1. INSPECTION REQUIREMENTS

2. COMPONENT OVERHAUL SCHEDULE

3. NO OVERHAUL REQUIRMENTS

4. INSPECTION EXAMPLE REVISION: (PAGE NUMBER) Revision 4 Page vii Page Apdx A - 9

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TABLE OF CONTENTS (Continued) Identification Title Page CHAPTER 6 DIMENSIONS AND ACCESS 06-00-00 1

1. AN EXPLANATION OF THE ROTORCRAFT FEATURES

2. LOCATION OF ACCESS PANELS 1

3. DIAGRAM OF STRUCTURAL ACCESS PLATES AND

INFORMATION NEEDED TO GAIN ACCESS FOR

INSPECTION WHEN ACCESS PLATES ARE NOT

PROVIDED CHAPTER 7 LIFTING AND SHORING 07-00-00 1

1. LIFTING

a. JACKING INFORMATION

b. LIFTING INSTRUCTIONS 1

2. SHORING INSTRUCTIONS 1 CHAPTER 8 LEVELING AND WEIGHING 08-00-00

1. LEVELING INFORMATION 1

2. WEIGHING AND DETERMINING THE CENTER OF GRAVITY INSTRUCTIONS.

CHAPTER 9 TOWING AND TAXIING 09-00-00 1

1. TOW INSTRUCTIONS 1

2. TAXIING INSTRUCTIONS 1 CHAPTER 10 PARKING AND MOORING 10-00-00 1

1. MOORING INFORMATION 1

2. PARKING INFORMATION 1

3. STORAGE LIMITATIONS 1 CHAPTER 11 • PLACARDS AND MARKINGS 11-00-00

1. PLACARD AND MARKING INFORMATION 1 CHAPTER 12 SERVICING 12-00-00

1. SERVICING INFORMATION

2. LUBRICATION INFORMATION

3. EQUIPMENT REQUIRED FOR SERVICING

4. CONSUMABLE MATERIALS CHAPTERS 20,51,60,70 STANDARD PRACTICES ( )-00-00

1. STANDARD PRACTICES

2. STANDARD PRACTICES INFORMATION REVISION: (PAGE NUMBER) Revision 4 Page viii Page Apdx A - 10

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TABLE OF CONTENTS (Continued) Identification Title Page CHAPTERS 21, 22, 23, 24, 25, 26, 27, 29, 30, 31,33, 34, 35, 36, 37, 45, 49 AIRFRAME SYSTEMS ( )-00-00 52, 53, 54, 55, 56. STRUCTURES ( )-00-00 62, 63, 64, 65, 66, 67, ROTORS ( )-00-00 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, and 83 POWERPLANT ( )-00-00 REQUIREMENTS 1

1. INTERFACE INFORMATION

2. DESCRIPTION OF ROTORCRAFT AND ITS SYSTEMS AND INSTALLATIONS 1

3. DESCRIPTION OF ROTORCRAFT'S ENGINE(S)

4. DESCRIPTION OF ROTORCRAFT'S ROTOR(S)

5. DESCRIPTION OF ROTORCRAFT'S APPLIANCES

6. BASIC CONTROL AND OPERATING INFORMATION

7. SERVICING INFORMATION

8. LOCATION OF ACCESS PANELS

9. LUBRICATION INFORMATION

10. EQUIPMENT REQUIRED FOR SERVICING

11. RECOMMENDED PERIODS

12. DEGREE OF THE INSPECTION

13. WORK RECOMMENDED

14. APPLICABLE WEAR TOLERANCE

15. TROUBLESHOOTING

16. ORDER AND METHOD OF REMOVAL

17. ORDER AND METHOD OF REPLACING

18. GENERAL PROCEDURAL INSTRUCTIONS - TESTING

19. GENERAL PROCEDURAL INSTRUCTIONS - CHECKING

20. STORAGE LIMITATIONS

21. SPECIAL INSPECTION TECHNIQUES

22. PROTECTIVE TREATMENT 7

23. STRUCTURAL FASTENERS

24. SPECIAL TOOLS Attachment 1 PART 27 REQUIREMENTS Attachment 2 INSTRUCTIONS FOR CONTINUED AIRWORTHINESS PROCEDURES

INFORMATION Attachment 3 AT CHAPTER LISTINGS 1 Attachment 4 TYPE DESIGN CHANGE ICA RECOMMENDED PROCRDURE 1 REVISION: (PAGE NUMBER) Revision 4 Page ix Page Apdx A - 11

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AC 27-1B, Chg 1 2/12/03 (MANUAL IDENTIFICATION)

TABLE OF CONTENTS (Continued) There is no requirement for a specific format for the Table of Contents. The Table of Contents may be for the complete manual, for each chapter, or for both. When a Table of Contents for each chapter is used, there should be a Table of Contents that lists all Chapters in the ICA.

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(MANUAL IDENTIFICATION) CHAPTER 1

INTRODUCTION The requirements of Appendix A to Part 27are identified by bold type and are contained in the Introduction Chapter of this document. These requirements should be included in the Instructions for Continued Airworthiness (ICA). Items in regular type are not required by the Federal Aviation Regulations (FAR) Joint Airworthiness Regulation (JAR), but we recommend the applicant include those items in the ICA for standardization and clarity. The underlined words and sentences are to emphasize the information. The same requirements exist for a Type Certificate (IC), Supplemental Type Certificate (STC), or other changes to the type design as specified in the Type Certificate Data Sheet accepted under a Field Approval (FA). The term Type Design Change refers to changes to the type design of the rotorcraft made under TC, STC, or FA. ICA for Type Design Change (TDC) need not include ATA chapters not affected by the modification. Appropriate text in regular type can be copied from the ICA Template. Text in italics and the appendices are for instruction and are not to be copied.

This guidance is intended for applicants who are required to comply with § 27.1529, Amendment 18, to prepare an ICA acceptable to the FAA/AUTHORITY, and applicants required to prepare an ICA for a major alteration accepted under a FA. The ICA Template may be used by any applicant who wishes to prepare an ICA.

1. ACCEPTABLE TO THE FAA AUTHORITY

a. The applicant must prepare Instructions for Continued Airworthiness in accordance with Appendix A to FAR JAR Part 27 that are acceptable to the FAA/AUTHORITY.

Reference § 27.1529. - As appropriate.

b. For the applicant's proposed ICA to be acceptable to the FAA/AUTHORITY, they should contain:

(1) The applicable requirements specified in Appendix A to FAR/JAR Part 27.

(2) Correct terminology and/or correct references.

(3) A Cover Page that will readily identify the publication as the applicant's ICA for that make and model rotorcraft.

(4) A revision control procedure and Record of Revisions that will show currency of the ICA.

(5) A means of identifying each page of the publication and a List of Effective Pages that lists each page and its revision number.

(6) A Table of Contents indicating the subject and location and providing ease of use for maintenance personnel.

c. FAA/AUTHORITY cannot make a determination of acceptability of the ICA without a complete ICA and all publications referenced in the applicant's ICA. ICA review will be discontinued when it is determined:

(1) The ICA is not complete.

(2) That all referenced publications were not submitted with the ICA.

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INTRODUCTION (Continued)

(3) The applicant did not audit the ICA to ensure it met the requirements specified in Appendix A of FAR JAR Part 27.

d. No determination of correct spelling, proper grammar, or accuracy of the information will be made by the FAA/AUTHORITY

e. FAA/AUTHORITY reviews and determines the acceptability ofICA. This ICA Template contains the requirements specified in Appendix A to FAR/JAR Part 27 and other items which are not specifically required by the FAR/JAR, but are needed to ensure that maintenance personnel have complete, correct, and current ICA.

f. Acceptance of the ICA is indicated by a signed and dated acceptance statement on the List of Effective Pages in the ICA.

2. MANUALS. The ICA must be in the form of a manual or manuals as appropriate for the quantity of data to be provided. Reference Appendix A, A27.2 (a).

3. CONTENT. The contents of the ICA must be prepared in the English language and must contain all items specified in Appendix A of Parts 27. Reference Appendix A, A27.3.

4. SCOPE.

a. Describe the scope of the ICA.

b. The scope normally includes the necessary information to carry out maintenance on the applicable rotorcraft or modification to a rotorcraft.

5. PURPOSE. Describe the purpose of the ICA.

6. ARRANGEMENT.

a. The applicant must provide a practical arrangement in the manual. Reference Appendix A, A27.2 (b).

b. The Introduction of the ICA should explain the manual arrangement and how to use it.

There is no requirement for any specific format or arrangement of the manual or manuals.

c. For standardization, we recommend using the ATA-100 numbering system and the format and content of this ICA Template.

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(MANUAL IDENTIFICATION) CHAPTER 1

INTRODUCTION (Continued)

d. The manual should not be in a mixed arrangement, i.e., a mixture of written text on both sides of a page and written text on one side of a page. The preferred method is written text on both sides of a page.

e. When there is no written text for a page, the page should contain the following statement:

THIS PAGE INTENTIONALLY LEFT BLANK The page should be identified in the same manner as the rest of the pages in the manual and the page listed in the List of Effective Pages.

7. SUPERSEDED DOCUMENTS. For Type Design Changes, the ICA should contain the following statement:

Superseded Documents: The information, procedures, requirements, and limitations contained in this Instructions for Continued Airworthiness for this type design change supersede the information, procedures, requirements and limitations contained in the rotorcraft's maintenance manual when the type design change is installed on the Type Certificate Holder's rotorcraft.

8. APPLICABILITY. The ICA should include the make, model, and serial number (if applicable) of rotorcraft to which the ICA apply.

9. DEFINITIONS. Some words or terms used in the ICA require defining in the Introduction.

AUTHORITY means another airworthiness authority that has adopted this ICA.

10. ABBREVIATIONS. Abbreviations used in the ICA should be listed with their words/terms in the Introduction of the ICA.

a. FAA/AUTHORITY = Federal Aviation Administration or another airworthiness authority

b. FAR = Federal Aviation Regulation

c. ICA = Instructions for Continued Airworthiness

d. JAR = Joint Airworthiness Regulations

e. LOAP = List of Applicable Publications

f. TDC = Type Design Changes

11. ACRONYMS. Acronyms used in the ICA should be listed with their terms in the Introduction of the ICA.

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AC 27-1B, Chg 1 2/12/03 (MANUAL IDENTIFICATION) CHAPTER 1 INTRODUCTION (continued)

12. SYMBOLS. Symbols used in the ICA should be listed with explanations in the Introduction of the ICA.

13. PRECAUTIONS. Precaution means a measure taken beforehand to prevent harm.

a. Any necessary precautions to be taken must be included in the ICA. Reference Appendix A, A27.3 (b)(3).

b. The following examples of precautions will differ due to the seriousness of the hazard or condition:

(1) WARNING: Could be a maintenance procedure, practice, condition, etc. that could result in personal injury or loss of life.

(2) CAUTION: Could be a maintenance procedure, practice, condition, etc. that could result in damage or destruction of equipment.

(3) NOTE: Could be a maintenance procedure, practice, condition, etc., or a statement which needs to be highlighted.

14. UNITS OF MEASUREMENT

a. The ICA contains units of measurements. These measurements could be instrument readings, temperatures, pressures, tolerances, limits, or torque values.

b. It is recommended the ICA contains both United States standard measurements and Metric measurement, for each measurement, tolerance, or torque value. A general conversion chart is not acceptable.

15. ICA FOR EACH ENGINE

a. The ICA must include ICA for each engine. Reference Appendix A, A27.1 (b).

b. ICA for type certificated engines are accepted by the FAA/AUTHORITY responsible for engines and could be included by reference in the applicant's ICA.

appropriate ANAtOr erify ed engines and prepaid by the applicant and submitted to

16. ICA FOR EACH ROTOR

a. The ICA must include ICA for each rotor. Reference Appendix A, A27.1 (b).

b. ICA for rotors is normally included in the rotorcraft ICA.

17. ICA FOR EACH APPLIANCE REQUIRED BY THIS CHAPTER

a. The ICA must include ICA for each appliance required by FAR/JAR.

Reference Appendix A, A27.1 (b).

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