SERVICE BULLETIN 200-016

PAGE 1 OF 2

AEROSPACE COMPANY

1-11 YOUNAN 1 CHOME.UTSUNOMIYA TOCHIGI

JAPAN 320-8564 TEL 028(684)7253, FAX 028(684)7260

SERVICE BULLETIN

 JCAB APPROVED

NO. 200-016 DATE April 17, 2014 (SUPERSEDES NO. ) 

REV. DATE (SUPERSEDES NO. )

REASON

1. SUBJECT : Replacement of “O” Rings of Brake Master Cylinder

2. AIRCRAFT AFFECTED : FA-200-160, FA-200-180 and FA-200-180AO

3. PRIORITY : Mandatory

4. REASON : To replace the aged “O” rings of the brake master cylinder due 

to potential sealing failure.

5. DESCRIPTION : Replace the “O” rings of the brake master cylinder per service 

manual.

6. ACCOMPLISHMENT :

(1) Accomplish this service bulletin for the brake master cylinders installed in the affected 

aircraft (if equipped with the “O” ring that is more than 1,000 flight hours or 5 years old, 

or if it is unknown when the previous replacement of the “O” rings was made) within 50 

flight hours or 1 year after the receipt of this service bulletin, whichever occurs first.

(2) When the brake master cylinder is replaced after the receipt of this service bulletin, 

check the date of the manufacture of the cylinder or the date of the previous 

replacement of the “O” rings by referring to any document with which the replacement

record can be identified. Accomplish the following.

a. New brake master cylinder

- If using a new brake master cylinder manufactured over 5 years ago, replace the “O” 

rings when installed on the aircraft (*).

b. Brake master cylinder other than new ones

- If using a brake master cylinder whose “O” rings were replaced over 5 years ago, 

replace the “O” rings when installed on the aircraft (*).

c. If it is unknown when the cylinder was manufactured or when the “O” rings were

previously replaced, replace the “O” rings when installed on the aircraft.

* If a new cylinder is less than 5 years old or a cylinder has the “O” rings replaced 

within 5 years, it is acceptable to install the cylinder without replacing the “O” rings. 

However its storage period (the time period from manufacture or previous “O” ring 

replacement until installation) must be included into work life.

 HEAD OFFICE ; SUBARU BLDG.

 SHINJUKU, TOKYO, JAPAN
SERVICE BULLETIN 200-016

PAGE 2 OF 2

7. JCAB APPROVAL : JCAB Approval (No-kou-14-006) April 16, 2014

8. WORK CLASSIFICATION : Tasks in this service bulletin fall under general maintenance.

9. PARTS REQUIRED : The following parts are required to accomplish this bulletin:

No. P/N NOMENCLATURE QTY/AC REMARKS

1 AN6227-8 or AN6227B8 “O”RING 2

Aircraft equipped with 

the 0541138 brake 

master cylinder

2 AN6227-9 or AN6227B9 “O”RING 2 Aircraft equipped with

the 200-584160-001

3 AN6227-4 or AN6227B4 “O”RING 2 brake master cylinder

10.SPECIAL TOOL : None

11.WEIGHT AND BALANCE

: Not affected

12. REFERENCE : Service Manual

13. DETAILED INSTRUCTIONS:

Replacement must be performed per Service Manual 9-5.

14. OTHERS: The task of this service bulletin must be recorded in the aircraft 

log book with the approval by qualified mechanics.

Service News will be published to announce the revision of the 

service manual for the change of the “O” ring inspection interval.