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U.S. Department Advisory of Transportation Federal Aviation Circular Administration Subject: Certification of Normal Category Date: 6/23/23 AC No: 27-1B Rotorcraft Initiated By: AIR-600 Change: 9
1. PURPOSE.
a. This revision makes needed changes to this Advisory Circular (AC).
b. The change number and the date of the changed material are shown at the top of each page. The vertical lines in the outside margin indicate the beginning and end of each change.
Pages that have different page numbers, but no text changes, will retain the previous heading information.
2. PRINCIPAL CHANGES.
This Change 9 includes changes, edits, and additions for these AC sections: 27.87,
27.903, 27.1305, 27.1309, 27.1329, 27.1335, 27.1353, 27.1543, 27.1545, 27.1549, 27.1555,
27.1587, AC 27 Appendix B.
The contents of this guidance document do not have the force and effect of law and are not meant to bind the public in any way. This guidance document is intended only to provide clarity to the public regarding existing requirements under the law or agency policies.
3. WEBSITE AVAILABILITY.
To access this AC electronically, you can go to either of the following sites:
http://www.faa.gov/regulations_policies/advisory_circulars/ https://drs.faa.gov/browse Dig tally signed by
VICTOR W WICKLUND 16:38:31-0400 Victor Wicklund, Acting Director, Policy & Standards Division Aircraft Certification Service
U.S. Department Advisory of Transportation Federal Aviation Circular Administration Subject: Certification of Normal Category Date: 06/29/2018 AC No: 27-1B Rotorcraft Initiated By: AIR-680 Change: 8
1. PURPOSE.
a. This Advisory Circular (AC) publishes needed changes to the existing Advisory Circular (AC) material.
b. The change number and the date of the changed material are shown at the top of each page. The vertical lines in the outside margin indicate the beginning and end of each change.
Pages that have different page numbers, but no text changes, will retain the previous heading information.
2. PRINCIPAL CHANGES. This change 8 includes changes, edits, and additions for section
27.773.
PAGE CONTROL CHART Remove Pages Dated Insert Pages Dated D-63 thru D-66 9/30/1999 D-63 thru D-66 06/29/18
3. WEBSITE AVAILABILITY. To access this AC electronically, go to the Advisory Circulars library at http:/www.faa.gov/regulations_policies/advisory_circulars/.
Dr. Michael C. Romanowski Director, Policy and Innovation Division Aircraft Certification Service
Advisory U.S. Department Circular of Transportation Federal Aviation Administration Subject: CERTIFICATION OF NORMAL Date: FEB 4 2016 AC No: 27-1B CATEGORY ROTORCRAFT Initiated by: ASW-110 Change: 7
1. PURPOSE.
a. This change publishes needed changes to the existing material and adds Miscellaneous Guidance (MG) sections to the Advisory Circular (AC).
b. The change number and the date of the changed material are shown at the top of each page. The vertical lines in the outside margin indicate the beginning and end of each change.
Pages that have different page numbers, but no text changes, will retain the previous heading information.
2. PRINCIPAL CHANGES.
a. This change 7 includes changes, edits, and additions for these AC sections: 27.865B,
27.1321, 27 MG 1, 27 MG 16, and 27 Appendix B.
b. This change adds to this AC the following MG sections: AC 27 MG 19 (Guidance on Electronic Display Systems (EDS) for Rotorcraft Installations), AC 27 MG 20 (Human Factors (HF)), and AC 27 MG 21 (Guidance on Creating a System Level Functional Hazard Assessment (FHA)).
3. WEBSITE AVAILABILITY. To access this AC electronically, go to the Advisory Circulars library at http://www.faa.gov/regulations_policies/advisory_circulars/.
Lance T. Cant Manager, Rotorcraft Directorate, Aircraft Certification Service
U.S. Department Advisory of Transportation Federal Aviation Circular Administration Subject: CERTIFICATION OF NORMAL Date: 7/25/2014 AC No: 27-1B CATEGORY ROTORCRAFT Initiated by: ASW-110 Change: 6
1. PURPOSE.
a. This Advisory Circular (AC) change publishes the new guidance on automatic flight guidance and control systems (AFGCS) installation in part 27 rotorcraft.
b. This AC does not change regulatory requirements and does not authorize changes in, or deviations from, regulatory requirements. This AC establishes an acceptable means, but not the only means, of compliance. Since the guidance material presented in this AC is not regulatory, terms having a mandatory definition, such as "shall" and "must," etc., as used in this AC, apply either to the reiteration of a regulation itself, or to an applicant who chooses to follow a prescribed method of compliance without deviation.
2. PRINCIPAL CHANGES. This change adds the miscellaneous guidance section 23 (MG
23), Automatic Flight Guidance and Control Systems (AFGCS) Installation in Part 27 Rotorcraft., to the AC.
3. WEBSITE AVAILABILITY. To access this AC electronically, go to the Advisory Circulars library at http://www.faa.gov/regulations_policies/advisory_circulars/.
Is/ Lance T. Gant, for Kim Smith Manager, Rotorcraft Directorate, Aircraft Certification Service
US. Department Advisory of Transportation Federal Aviation Circular Administration Subject: CERTIFICATION OF NORMAL Date: 6/13/2014 AC No: 27-1B CATEGORY ROTORCRAFT Initiated by: ASW-110 Change: 5
1. PURPOSE.
a. This Advisory Circular (AC) change publishes the new guidance on analyzing an advanced flight controls (AdFC) system installation in normal category rotorcraft.
b. This AC does not change regulatory requirements and does not authorize changes in, or deviations from, regulatory requirements. This AC establishes an acceptable means, but not the only means, of compliance. Since the guidance material presented in this AC is not regulatory, terms having a mandatory definition, such as "shall" and "must," etc., as used in this AC, apply either to the reiteration of a regulation itself, or to an applicant who chooses to follow a prescribed method of compliance without deviation.
2. PRINCIPAL CHANGES. This change adds the miscellaneous guidance section 17 (MG 17), Guidance on Analyzing an Advanced Flight Controls (AdFC) System, to the AC.
3. WEBSITE AVAILABILITY. To access this AC electronically, go to the Advisory Circulars library at http://www.faa.gov/regulations policies/advisory circulars/.
/s/ Kim Smith Kim Smith Manager, Rotorcraft Directorate, Aircraft Certification Service
AC 27.1B, Chg 4 5/1/2014 Advisory U.S. Department Circular of Transportation Federal Aviation Administration Subject: CERTIFICATION OF NORMAL Date: 5/1/2014 AC No: 27-1B CATEGORY ROTORCRAFT Initiated by: ASW-110 Change: 4
1. PURPOSE.
a. This Advisory Circular (AC) publishes needed changes to the existing AC material.
Additionally, there is incorporation of previously approved AC material and non-technical editorial changes to various sections.
b. The change number and the date of the changed material are shown at the top of each page. The vertical lines in the outside margin indicate the beginning and end of each change. Pages that have different page numbers, but no text changes, will retain the previous heading information.
c. This AC does not change regulatory requirements and does not authorize changes in, or deviations from, regulatory requirements. This AC establishes an acceptable means, but not the only means, of compliance. Since the guidance material presented in this AC is not regulatory, terms having a mandatory definition, such as "shall" and "must," etc., as used in this AC, apply either to the reiteration of a regulation itself, or to an applicant who chooses to follow a prescribed method of compliance without deviation.
Z. PRINCIPAL CHANGES.
a. The AC sections previously approved on September 17, 2009 and posted separately to the Regulatory and Guidance Library (RGL), which are related to the Rotorcraft Performance and Handling Qualities rulemaking, are incorporated in this change 4. Those AC sections that were added or changed are: 27.25A, 27.49, 27.51A, 27.71, 27.73, 27.75A, 27.79, 27.87, 27.143A, 27.173A,
27.175A, 27.177A, 27.903B, 27.1587A, and 27 Appendix B.
b. The changed AC 27 Miscellaneous Guidance (MG) 5 section (Agricultural Dispensing Equipment Installation), previously approved on December 15, 2009 and posted separately to the Regulatory and Guidance Library (RGL), is incorporated in this change 4.
c. The AC 27.573 section previously approved on December 1, 2011 and posted separately to the Regulatory and Guidance Library (RGL), which is related to the Damage Tolerance and Fatigue Evaluation of Composite Rotorcraft Structures rulemaking, is incorporated in this change 4.
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d. The changed AC 27 MG 6 section (Emergency Medical Service (EMS) Systems Installations Including: Interior Arrangements, Equipment, Helicopter Terrain Awareness and Warning System (HTAWS), Radio Altimeter, and Flight Data Monitoring System), previously approved on February 27, 2014, is incorporated in this change 4.
e. The changed AC 27 MG 18 section (Helicopter Terrain Awareness and Warning System (HTAWS)), previously approved on February 27, 20014, is incorporated in this change 4.
f. This change 4 also includes changes, edits, and additions for these AC sections: 27.29, 27.45,
27.75, 27.79, 27.141, 27.143, 27.151, 27.337, 27.351, 27.561, 27.562, 27.610, 27.783, 27.863, 27.865,
27.865B, 27.871, 27.903B, 27.939, 27.1011, 27.1093, 27.1093A, 27.1187, 27.1309, 27.1316, 27.1317,
27.1329, 27.1337, 27.1357, 27.1435. 27.1501, 27.1543, 27.1549, 27 MG 8, 27 MG 10, 27 MG 13, and 27 MG 22.
3. WEBSITE AVAILABILITY. To access this AC electronically, go to the Advisory Circulars library at http://www.faa.gov/regulations_policies/advisory_circulars/.
/s/ Lance T. Gant, for Kim Smith Manager, Rotorcraft Directorate, Aircraft Certification Service Page ili
Advisory U.S. Department of Transportation Circular Federal Aviation Administration Subject: CERTIFICATION OF NORMAL Date: 9/30/2008 AC No: 27-1B CATEGORY ROTORCRAFT Initiated by: ASW-110 Change: 3
1. PURPOSE.
a. This Advisory Circular (AC) publishes needed changes to the existing AC material as a result of a safety-focused study.
b. This change revises existing material in 6 sections.
c. The change number and the date of the changed material are shown at the top of each page.
The vertical lines in the right or left margin indicates the beginning and end of each change. Pages that have different page numbers, but no text changes, will retain the previous heading information.
d. This AC does not change regulatory requirements and does not authorize changes in, or deviations from, regulatory requirements. This AC establishes an acceptable means, but not the only means, of compliance. Since the guidance material presented in this AC is not regulatory, terms having a mandatory definition, such as "shall and "must," etc., as used in this AC, apply either to the reiteration of a regulation itself, or to an applicant who chooses to follow a prescribed method of compliance without deviation.
2. PRINCIPAL CHANGES. Sections 27.571, 27.679, 27.695, 27.783, 27.901A, and 27.1351 are revised.
3. WEBSITE AVAILABILITY. To access this AC electronically, log on to http://www.airweb.faa.gov/rgl and then click on AC's.
AC 27.1B, Chg 4 5/1/2014 AC 27-1B, Chg 3
PAGE CONTROL CHART Remove Pages Dated Insert Pages Dated v thru xii .... . 9/30/99 & 4/25/06 v thru xii 9/30/99, 4/25/06, & 9/30/08 C-83 thru C-87 ... .. 9/30/99 & 2/12/03 C-83 thru C-88. .. 9/30/08 D-39 thru D-40 . ..9/30/99 D-39 thru D-40.2 9/30/08 D-45 thru D-46 .. ..9/30/99 D-45 thru D-46.. 9/30/99 & 9/30/08 D-71 thru D-72. ..9/30/99 D-71 thru D-72.2 9/30/99 & 9/30/08 E-5 thru E-6 .. ..9/30/99 E-5 thru E-6 .. .. 9/30/08 F-53 thru F-56. 9/30/99 F-53 thru F-56. 9/30/08 Signed by Scott A. Horn for Mark R. Schilling Acting Manager, Rotorcraft Directorate Aircraft Certification Service Page ii
Advisory of Transportation U.S. Department circular Federal Aviation Administration Subject: CERTIFICATION OF NORMAL Date: 4/25/06 AC No: 27-1B CATEGORY ROTORCRAFT Initiated ASW-110 Change 2 PURPOSE.
a. This change incorporates all the previously revised AC paragraphs that were posted as accepted and finalized AC material on the FAA RGL website since 2/12/03.
b. This change revises existing material in 13 paragraphs and adds new material for one paragraph.
C. The change number and the date of the changed material are shown at the top of each page. The vertical lines in the right and left margins indicate the beginning and end of each change. Pages that have different page numbers but no text changes will retain the previous heading information.
d. This AC does not change regulatory requirements and does not authorize changes in, or deviations from, regulatory requirements. This AC establishes an acceptable means, but not the only means, of compliance. Since the guidance material presented in this AC is not regulatory, terms having a mandatory definition, such as "shall" and "must," etc., as used in this AC, apply either to the reiteration of a regulation itself, or to an applicant who chooses to follow a prescribed method of compliance without deviation.
PRINCIPAL CHANGES.
a. Paragraphs 27.351, 27.602, 27.672, 27.683, 27.777, 27.1321, 27.1585, MG 1, MG 4, MG 8, MG 16, Appendix A, and Appendix B are revised.
b. The AC material in MG 12 has been revised by a working group and is now contained in AC 27.865B, in Subpart D.
c. New paragraph MG 18, Helicopter Terrain and Awareness Systems (HTAWS), is added to Chapter
3.
d. New figure AC 27.351-2 is added in Chapter 2.
e.New figures AC 27 MG 8-1, MG 8-2, MG 8-3, MG 8-4, MG 18-1, MG 18-2, and MG 18-
2.1 are added in Chapter 3.
WEBSITE AVAILABILITY. To access this AC electronically, log on to http://www.airweb.faa.gov/rgl and then click on AC's.
AC 27.1B, Chg 4 5/1/2014 AC 27-1B, Chg 2
PAGE CONTROL CHART Remove pages Dated Insert Pages Dated v thru x .. 9/30/99 & 2/12/03 v thru x.... 4/12/06 xiii thru xxi. . 2/12/03 xiii thru xx11. 4/12/06 C-9 thru C-86 9/30/99 & 2/12/03 C-9 thru C-87.. 4/12/06 D-1 thru D-58.. 9/30/99 & 2/12/03 D-1 thru D-58 .. ..4/12/06 D-67 thru D-70.. .. 9/30/99 D-67 thru D-70. 4/12/06 D-109 thru D-112 9/30/99 & 2/12/03 D-109 thru D-133 . 4/12/06 F-33 thru F-46.. 9/30/99 F-33 thru F-46.... 4/12/06 G-43 thru G-48.. 9/30/99 G-43 thru G-49 .. 4/12/06 MG 1-15 thru MG 1-17.. 9/30/99 MG 1-15 thru MG 1-16 .. 4/12/06 MG 4-9 thru MG 4-13. 9/30/99 MG 4-9 thru MG 4-13 . .4/12/06 MG 8-1 thru MG 8-15.. 9/30/99 & 2/12/03 MG 8-1 thru MG 8-31 4/12/06 MG 12-1 thru MG 12-42... 9/30/99 & 2/12/03 MG 12-1 .. 4/12/06 MG 16-1 thru MG 16-16 2/12/03 MG 16-1 thru MG 16-18 4/12/06 none MG 17-1 4/12/06 none MG 18-1 thru MG 18-27 .. 4/12/06 Apdx A-47 thru Apdx A-70.. 2/12/03 Apdx B-11 thru Apdx B-20 9/30/99 Apdx A-47 thru Apdx A-71. 4/12/06 Apdx B-11 thru Apdx B-20 .. 4/12/06 David A. Downey Manager, Rotorcraft Directorate Aircraft Certification Service Page ii