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Old 16.12.2012, 02:32
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Operational issues with ERSB

ADVISORY WIRE
RFB789-23-2012
DATE: 12/12/12
PAGE 1 OF 1
FROM: BOMBARDIER AIRCRAFT CUSTOMER SUPPORT

SUBJECT:
Windshield mounted eye reference system balls (ERSB) used for pilot orientation and optimal seat position.

EFFECTIVITY:
CL600-2B19, BD700-1A11 (9210 & SUBS), CL600-2C10, CL600-2D24

PROBLEM:
It has come to our attention that many operators in the field are misusing, or are unfamiliar with the proper use of their balls. The intent of this ADVISORY WIRE is to provide operational information, and clarify some common misconceptions regarding the eye reference system balls (ERSB).

HISTORY:
The original ball system was developed by China Airlines Captain, Ting Ling, to assist pilots with a reference seat position for low weather minimums or Category III approaches. It should be noted that the first successful CAT III approach was completed with Ting Ling balls. Even today there are approaches being flown all over the world with Ting Ling balls. Captain Ling originally had balls of steel, but due to the interference with the magnetic compass Captain Ling switched to brass balls. Today’s balls are commonly made from synthetic materials, and can be equipped with various options to include lighting and chimes. BOMBARDIER has recently developed a ball system with a 3-ring chime called the Dingle Ball. Ref: PN-754-11297DB. Some operators have opted for the NBAA system which is No Balls At All. Regardless of the system you have installed it is important that each operator understand the proper maintenance and operation of their balls.

OPERATIONAL ISSUES:
It has been reported that many pilots are spending too much time adjusting their balls during critical phases of flight. Sighting your balls should require only a single adjustment. Excessive manipulation should be avoided to prevent distraction and mechanical wear. Once a position is selected stick to it. Remember your balls are only an aid; it doesn’t require balls to fly an approach. Some operators have adopted a policy of no ball adjustment below 10,000 feet. For those operators with lighted balls there are some considerations regarding CRM. The “Pilot Flying,” when appropriate, should initiate the call “light my balls.” The “Pilot Monitoring” should respond with “your balls are lit captain." Standardized terminology can help prevent errors.

LIMITATIONS:
--Minimum operating temperature -60C (prevents blue balls issue).
--Avoid high temperature +50C & high humidity (prevents sweaty balls).

MAINTENANCE:
Your eye reference system balls (ERSB) require little maintenance. Occasional dusting of your balls, or cleaning with a damp cloth should be all that is required. Do not use harsh detergents, and avoid scratching your balls. Avoid touching your balls any more than absolutely necessary. If your balls need replacement or mechanical adjustment we always recommend the use of a maintenance professional. You should not allow you balls to be handled by just anyone.
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