G550-ACB-01

Electrical Power (ATA 24), Wiring Harness Contacting Oxygen BottleInformation:I. PlanningA. Effectivity:Aircraft serial numbers 5001 through 5051B. Reason:Contact between a wiring harness and the crew oxygen bottle was found on an aircraftduring the final phase of manufacture. Although inspections of several in-service aircrafthave not revealed contact of this nature, the potential exists for insufficient clearance onother aircraft. Gulfstream has created Drawing 1159SB59987 to correct this condition.C. Description:This alert customer bulletin is divided into two parts. Part I is a one-time action toinspect for clearance between wiring harnesses and oxygen bottles. Part II is a one-timeaction to ensure incorporation of Drawing 1159SB59987.D. Compliance:Compliance with Part I of this alert customer bulletin is to be accomplished within thenext 25 flight hours. Compliance with Part II of this alert customer bulletin is to beaccomplished within 150 flight hours after the completion of Part I.E. Manpower:Part I - 4 man-hoursPart II - 6 man-hoursF. Material: (if required)Part Number Description Qty.GAB850S-3 Base Mounting Plate 3MS3367-3-9 Ty-rap 3MS3367 -1-6 Ty-rap 6M30570 .032 Teflon Sheeting as required (sold in sq. ft.)M30508 .125 Teflon Sheeting as required (sold in sq. ft.)G. References:•G550 Maintenance Manual, ATA Chapters 24 and 35•Drawing 1159SB59987 (attached)H. Tooling/Equipment:Standard aircraft maintenance toolsI. Warranty Coverage – (Component):Labor and material will be at no charge if the aircraft is still within the relevant warrantyperiods and this alert customer bulletin is accomplished within the recommendedcompliance time, as stated in this document, at a Gulfstream G550 Authorized WarrantyRepair Facility. **Coverage is granted per the terms and conditions of the Gulfstream Aircraft SalesAgreement to the original purchaser or subsequent owner with appropriate Assignmentof Warranties on file with Gulfstream.J. Weight and Balance:N/APart III. AccomplishmentInstructions:CAUTION:PROTECT WIRE BUNDLES, CONNECTORS AND SURROUNDING STRUCTURE DURING ANY MAINTENANCE PROCEDURES FROM SHAVINGS,DEBRIS AND CONTAMINATION. MAINTAIN A PROPERLY CLEANED WORKAREA THROUGHOUT THE PROCEDURE TO ENSURE THE INTEGRITY OFTHE AFFECTED COMPONENT / SYSTEM. VISUALLY INSPECT WORK AREAUSING ADDITIONAL LIGHT AS NECESSARY TO VERIFY ABSENCE OF ANYDEBRIS PRIOR TO COMPLETION OF PROCEDURE. FAILURE TO COMPLYMAY RESULT IN DAMAGE TO COMPONENTS AND / OR SYSTEMS.A. Prepare the aircraft for safe maintenance.B. Gain access to the crew oxygen bottle by opening FLR 4C.C. Using Figure 1 as reference, inspect area around forward end of bottle, including anysupports, for contact or insufficient clearance with any wiring harness. (A minimum of.500-inch clearance between bottle and wiring is required.)D. If contact is found, inspect wiring for evidence of damage. If damage is noted, contactGulfstream Customer Support for assistance. If no damage is noted, apply a sufficientamount of .032 Teflon sheeting to harness (if not already present) and an additionallayer of .125 Teflon sheeting for a total thickness of .157. Comply with Part II of thisdocument within 150 flight hours.E. If less than a .250-inch clearance is found, apply a sufficient amount of .032 Teflonsheeting to harness (if not already present) and an additional layer of .125 Teflonsheeting for a total thickness of .157. Comply with Part II of this document within 150F. If no contact is noted and there is at least .250 inch clearance, but less than .500 inch,apply a sufficient amount of .032 Teflon sheeting to harness. Comply with Part II of thisdocument within 150 flight hours.G. If there is at least a .500-inch clearance, comply with Part II of this document within 150flight hours.H. Ensure work area is clean and clear of foreign objects (FOD) and close FLR 4C.I. Record compliance with Part I of this alert customer bulletin in the aircraft’s permanentmaintenance records and return aircraft to flight status.J. Report compliance with Part I of this alert customer bulletin to Gulfstream CMP via electronic transmittal or fill out and fax the attached service reply card.Part IIA. Prepare the aircraft for safe maintenance.B.Gain access to the crew oxygen bottle by opening FLR 4C.C. Comply with Drawing 1159SB59987.D. Ensure work area is clean and clear of foreign objects (FOD) and close FLR 4C.E. Record compliance with Part II of this alert customer bulletin in the aircraft’s permanentmaintenance records and return aircraft to flight status.F. Report compliance with Part II of this alert customer bulletin to Gulfstream CMP viaelectronic transmittal or fill out and fax the attached service reply card.If technical assistance is required, contact your area Gulfstream Field Service Representative or call Gulfstream Customer Support at 800-810-GULF (4853) or 912-965-4178 (fax 912-965-4184).View of forward end of Crew Oxygen BottleFigure 1Customer Bulletin prepared by Gulfstream Aerospace Corporation, 500 Gulfstream Road, P.O. Box 2206, Savannah, Georgia 31402-2206, USA.© 2004 Gulfstream Aerospace Corporation.All rights reserved, including the right to reproduce this publication. No part may be reproduced, stored in any retrieval system, or transmitted in any part or form or Service Reply CardPart IPlease fax this page to Gulfstream CMP at 912-965-3598.The following Alert Customer Bulletin (ACB) has been addressed:ACB Number A/C A/C Type Compliance Date990010 G550Aircraft HoursAircraft LandingsPart I of this Alert Customer Bulletin is not applicable because:Serial Number not affectedAppliance not installedSignature Title/Certificate Number CompanyComments / Suggestions:by any means, electronic, photocopying, microfilm, microfiche, mechanical, or otherwise, without prior written permission of Gulfstream Aerospace Corporation.Customer Bulletin prepared by Gulfstream Aerospace Corporation, 500 Gulfstream Road, P.O. Box 2206, Savannah, Georgia 31402-2206, USA.© 2004 Gulfstream Aerospace Corporation.All rights reserved, including the right to reproduce this publication. No part may be reproduced, stored in any retrieval system, or transmitted in any part or form or by any means, electronic, photocopying, microfilm, microfiche, mechanical, or otherwise, without prior written permission of Gulfstream Aerospace Corporation.Service Reply CardPart IIPlease fax this page to Gulfstream CMP at 912-965-3598.The following Alert Customer Bulletin (ACB) has been addressed:ACB Number A/C A/C Type Compliance Date990011 G550Aircraft HoursAircraft LandingsPart II of this Alert Customer Bulletin is not applicable because:Serial Number not affectedAppliance not installedSignature Title/Certificate Number CompanyComments / Suggestions:。