0 LEGEND
1. Inboard MLG door.
3. Fwd member.
-4. OVter skin ..
s. oos.s member.
7. An member.
9. OUterdoubler, NOTES 1 Shaded areas are · to be examined.
2. Oulboaril MLG door noc $hown tor e1anfy, 5 4 , © ®
LEFT SIDE SHOWN
RIGHT SIDE OPPOSITE 1
OUTSOARO
MLGDOOR (REF) 06/16/2014 AC 20-176A Appendix C Appendix C. Examples of Concepts to Clarify Illustrations
1. Shade or Cross Hatch Important Areas. Use this method to show important areas, such as those to be inspected. This method can also be used for other situations as long as the intent of the shading or cross-hatching is communicated clearly.
Figure C-1. Example of the Use of Shading Important Areas C-1
D 0
WASHER ----, PN NAS1149FNl32P (REMOVE AND DISCARD) DET. D (PRE-MOD) 0 BOLT (2 POSITIONS) PN NAS1091>-2•8 (REMOVE AND DISCARD) 0 ----- WASHER (2 POSITIONS) PN NAS1149FN832P (REMOVE AND DISCARD) 0 MICROSW!TCH SUPPORT ASSY PN 145-40193-401 (REMOVE AND DISCARD) 06/16/2014 AC 20-176A Appendix C
2. Phantom Lines. Use this method to show the location of a part, etc. for reference purposes.
This method can be used for other situations as long as the intent is communicated clearly.
Figure C-2. Example of the Use of Phantom Lines
3. Enlarged Views in Illustrations. Use this method to provide emphasis on a certain part of an illustration. This can also be used for other situations as long as the intent is communicated clearly.
C-2
FRAME
•• (JIEF)
1.FPER I llfT'ERCOSTAL n+n UPl'ER INfEACOSTAL (REF) (REF) l~ I ,- : ,; U :,;, STGR FRAME ..
(JIEF) ...... .;-·+ •t ~ - 6 I
OPTIONAL (REF) CUTUNE LOWER
INTERCOSTAL l"EF) STGR
• (JIEF) STOil 7 (JIEF) STGR 7 (REF) . . -· ....... 261240 1 L -1..,_ CLOSE:OUT (IS) STGR
- .
STOil t::::>- 11 (JIEF)
OPTIONAL Cl/TUN E LOWER INTEFIOOSTAl (REF) (REF) STGR 10 (REF) Detail B . FWD FRAME 24 (JIEF) ,,I i,-~. - :n -~ n: : : ; i l : :: : V 1,..: 1..;:
•-·-·+o-·-·-·4 . u~••••••••H••'••
FRAME CAP
CUT LINE (JIEF) I +----·: if"' n ni : , : . ~·-!i--1---- FRAME CAP ,_i_k,: •• ~·L;":.:i., 2612240p2 ,., _,,,, .. ,,,,, .. \SCRAP) . . -.
(VPPE.R FRAME CAP CUT UNE}
(l.H SHOWN) Detail C 06/16/2014 AC 20-176A Appendix C Figure C-3.Example of Enlarged Views in Figures C-3
D-D Appendix C
4. Dimensions and Tolerances. Use this method to show dimensions and tolerances for particular locations on parts.
Figure C-4. Example of Dimensions and Tolerances C-4
WITHIN &.lOO FLIGHT
CYCLES LNSPECT THE
YOKE A SSEMBLY AHO
THE PCU LUG FOR
DAMAG E l l
DAMAG E NODAIAAG E
FOUND FOUND I l l NO DAt..iAGE TO PCU
BUT YOKE ASS EMBLY NICKS AND'OR REP EAT THE
HAS VISUAL BEARING GAUGES F OUN D FRETTI NG REPLAC E INSPECTION ROTA.TtON OR ON P CU LU G B UT DAMAGETO YOKE WITI-IIN 500 ,_ MIGRATION, SIGNS OF t~O FRETTING PCU LUGS ASSEMBl. Y FLIGHT WEARTOA.NTI DAMAGE TO PCU CYCLES
ROTATION LUGS OR LUG FRi:ITU4G 1
REPLAC E REPLACE REMOVEPCU
YOKE YOKE ANO REPA IR OR
ASSEMBLY ASSEMBLY REPLAC E THE BEFORE WITHIN 3000 PCUBE FORE
FURTH ER F LIGHT FURTH ER
FLIGHT CYCLES FLIGHT I l
REPEAT TH E
INSPECTION WfTHIN 3000 FLIGHT
CYC LES 06/16/2014 AC 20-176A Appendix D Appendix D. Example of Logic-Based Diagrams The following is an example of a logic-based diagram.
Figure D-1. Example of Logic Based Diagram Note: The logic-based diagram only supplements the information in the accomplishment instructions and compliance paragraphs and is not intended to serve as the primary source for tasks or compliance times in this SB.
D-1
Appendix E Appendix E. Related FAA Publications
1. Where to Find Publications. Publications referenced throughout this document refer to the latest revision level. You can get copies from the FAA Web site at http://www.faa.gov/ and our Regulatory and Guidance Library (RGL) at http://rgl.faa.gov.
a. FAA AC 39-9, Airworthiness Directives Management Process
b. FAA Orders.
(1) Order 8100.15, Organization Designation Authorization Procedures
(2) Order 8110.37, Designated Engineering Representative (DER) Handbook
(3) Order 8110.103, Alternative Methods of Compliance (AMOC)
c. DOT Order 2100.2, Policies for Public Contacts in Rulemaking
d. FAA Manual FAA-IR-M-8040.1, Airworthiness Directives Manual E-1
Appendix F Appendix F. Acronyms 14 CFR Title 14 of the Code of Federal Regulations AC Advisory Circular AD Airworthiness Directive AMM Aircraft Maintenance Manual AMOC Alternative Method of Compliance ATA Air Transportation Association CMM Component Maintenance Manual CRT Compliance Review Team DAH Design Approval Holder DER Designated Engineering Representative FAA Federal Aviation Administration FIM Fault Isolation Manual FRV Federal Register Version (of an Emergency AD) IAR Immediately Adopted Rule IBR'd Incorporated by Reference ICA Instructions for Continued Airworthiness NDT Non-Destructive Test NFR No-Notice Final Rule NPRM Notice of Proposed Rulemaking ODA Organization Designation Authorization OFR Office of the Federal Register OHM Overhaul Manual RC Required for Compliance RGL Regulatory Guidance Library SB Service Bulletin SNPRM Supplemental Notice of Proposed Rulemaking SOPM Standard Overhaul Practices Manual SRM Structural Repair Manual SWPM Standard Wiring Practices Manual UM Unit Member WDM Wiring Diagram Manual F-1
_____________________________________________________________________________ _____________________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ 06/16/2014 AC 20-176A Appendix G Appendix G. Advisory Circular Feedback Information If you have comments or recommendations for improving this advisory circular (AC), or suggestions for new items or subjects to be added, or if you find an error, you may let us know about by using this page as a template and 1) emailing it to 9-AWA-AVS-AIR500-Coord@faa.gov or 2) faxing it to the attention of the AIR Directives Management Officer at 202-267-3983.
Subject: (insert AC number and title) Date: (insert date)
Comment/Recommendation/Error: (Please fill out all that apply)
An error has been noted:
Paragraph _________________
Page ______
Type of error (check all that apply): Editorial: ----- Procedural---- Conceptual _____
Description/Comments: ____________________________________________________ Recommend paragraph ______ on page _____ be changed as follows:
(attach separate sheets if necessary) In a future change to this advisory circular, please include coverage on the following subject:
(briefly describe what you want added attaching separate sheets if necessary) Name: ___________________________ G-1