Rolls-Royce Remote Oil Filler Valve Bulletin - Code7700

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LIST OF EFFECTIVE PAGESThe effective pages to this Service Bulletin are as follows:Page Revision Number Revision DateBulletin1 Jul.14/062 Jul.14/063 Jul.14/064 Jul.14/065 Jul.14/066 Jul.14/067 Jul.14/068 Jul.14/069 Jul.14/0610 Jul.14/0611 Jul.14/0612 Jul.14/0613 Jul.14/0614 Jul.14/0615 Jul.14/06Printed in Great BritainTAY−79−1698Transmittal - Page 2
OIL - REMOTE OIL FILL VALVE - INTRODUCTION OF A NEW REMOTE OIL FILL VALVE (ROFV) WITHA MODIFIED PISTON AND VALVE SEAT - MOD.79-16981. Planning InformationPrinted in Great BritainA. Effectivity(1) Gulfstream IV-X.Tay 611-8C Engines, prior to Engine Serial Number 85120.Non-Modular.B. Concurrent RequirementsNone.C. Reason(1) ProblemOil leakage from the Remote Oil Fill Valve (ROFV) overflow port can occurafter oil filling operation. The oil leakage is caused by the valve notclosing fast enough after the oil filling operation, because of acondition known as 'hydraulic lock'. The overflow passage then staysslightly open and the accessory gearbox internal air pressure thatdevelops during engine operation causes the oil to be pushed out of theROFV overflow port to overboard.(2) EvidenceThis was identified on engines in service.(3) SubstantiationThe changes introduced by this Service Bulletin were the subject ofsatisfactory engineering analysis and tests. This Service Bulletincomplies with the applicable engine certification basis.(4) ObjectiveIntroduction of this Service Bulletin is designed to maintain reliability.Jul.14/06Jul.14/06TAY−79−1698Page 1 of 15
Page 1: Jul.14/06TAY SERIES PROPULSION SYST
Page 6 and 7: I. Tooling Price and AvailabilityNe
Page 8 and 9: 3. Accomplishment InstructionPART 1
Page 10 and 11: E. Remove the breather tube (79-11-
Page 12 and 13: (3) Loosely install the union nut (
Page 14 and 15: (4) Refer to the Standard Practices
Page 16 and 17: U. Install the breather tube (79-11

Rolls-Royce Remote Oil Filler Valve Bulletin - Code7700

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