# Robinson Service Bulletin R66 21: Revision A

- Rights: © Robinson. Filed by the FAA in regulations.gov docket FAA-2017-1236; AD 2019-07-02 incorporates this document by reference. Not covered by OpenAirDocs’ CC0 dedication.
- Document: [Robinson Service Bulletin R66 21](https://openairdocs.org/service-documents/robinson/r66-21.md)
- Title as filed: Robinson Helicopter Company R66 Service Bulletin SB-21A
- Pages: 3
- PDF: https://openairdocs.org/files/sha256/8d/d8/8dd80f9e364045275e33bf765c919a28811619af66f5b07e7c0c8a1f60a576b9
- Page: https://openairdocs.org/service-documents/robinson/r66-21/file/8dd80f9e3640

## Text

This text is OCR from a scan. OCR can misread letters and numbers. Each page's text from the PDF; open the PDF at a page with #page=N.

### Page 1

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### Page 3 (OCR)

R66 SB-21A
Page 3 of 3
G689-1 Oil tank assembly
Firewall
(Ref) /
ENGINE OIL
F723-1 Line assembly
FORWARD
Drain plug
VIEW LOOKING INBOARD
Firewall
Oil tank outlet
fitting
(replace tank if  G805-1 Angle
blue-colored)  G805-1 Angle  correctly installed.
Insert G805-1 Angle
completely into oil tank
fitting as shown.
VIEW LOOKING FORWARD
FIGURE 1
THE DESIGN ENGINEERING ASPECTS OF THIS BULLETIN HAVE BEEN SHOWN TO COMPLY WITH
APPLICABLE FEDERAL AVIATION REGULATIONS AND ARE FAA APPROVED.

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