Service Bulletin No. 150-52-188
Gulfstream Aerospace G150 · Service Bulletins
Overview
This document is a service bulletin for the Gulfstream G150 aircraft, specifically addressing the adjustment of the internal microswitch for the Main Entrance Door (MED) airstair. It outlines the reasons for the adjustment, compliance requirements, and detailed instructions for maintenance personnel.
- Applies to aircraft serial numbers 201 through 318.
- Mandatory compliance within 24 months from January 15, 2016.
- Improves the operation of the CABIN DOOR UNLOCK warning system.
- Estimated labor hours for the adjustment are 6.
- No change to electrical load data.
- Parts required can be obtained from Gulfstream Spare Parts Sales.
- Includes detailed step-by-step adjustment instructions.
- Reviewed and approved by the Civil Aviation Authority of Israel.
Document
Source
Originally published by regulations.gov. Sprinkle hosts a reference copy with an added summary, specifications and searchable full text.
Document details
- Type ·
- Service Bulletins
- Year ·
- 2016
- File size ·
- 291 KB
- Publisher ·
- regulations.gov
- Language ·
- en
Specifications & performance
Extracted from this document.
Specifications
- Weight and balance ·
- Negligible
- Electrical load data ·
- No change
What is the Service Bulletin No. 150-52-188?
The Service Bulletin No. 150-52-188 is a service bulletins for the Gulfstream Aerospace G150, dated 2016.
Where does the Service Bulletin No. 150-52-188 come from?
This copy of the Service Bulletin No. 150-52-188 was originally published by regulations.gov and is hosted on Sprinkle as a free, searchable reference copy.
What year was the Service Bulletin No. 150-52-188 published?
The Service Bulletin No. 150-52-188 — the Gulfstream Aerospace G150 service bulletins on file — is dated 2016.
Most owners only have the POH. Here's the essential set for the Gulfstream Aerospace G150.
- Pilot's Operating Handbook / AFM
- Checklist
- Maintenance Manual
- Parts Catalog (IPC)
- Systems & Wiring
- Service Bulletins on file
- Type Certificate (TCDS)
More Gulfstream Aerospace G150manuals & documents
Related documents
- SERVICE BULLETIN - FUSELAGE - FORWARD FUEL TANK PROBE CLEARANCE VERIFICATIONGULFSTREAM G280 · Service Bulletins
- Gulfstream G650ER Aircraft Service Change 069GULFSTREAM G650ER · Service Bulletins
- SB 500-25-009, REV BECLIPSE EA500 · Service Bulletins
- ENGINE CONTROLS - THROTTLE WARNING/GEAR RETRACTION PREVENTION CAM INSPECTION/INSTALLATIONBeechcraft 58TC Baron · Maintenance Manual
- PC-12 Service Bulletin Number 55-004PILATUS PC-12/47 · Service Bulletins
In this document
Effectivity
Applies to aircraft serial numbers 201 through 318.
Reason
The bulletin addresses a potential issue where the CABIN DOOR UNLOCK warning may extinguish prematurely.
Compliance
Mandatory compliance is required at the next suitable maintenance period within 24 months from the release date.
Material Information
Parts required for the adjustment are available through Gulfstream Spare Parts Sales.
Accomplishment Instructions
Detailed instructions for adjusting the internal microswitch are provided, including safety precautions.
Safety Notes
Cautions regarding the protection of wire bundles and the proper handling of the door mechanism are included.
Safety notes
- Protect wire bundles, connectors, and surrounding structure during maintenance.
- Forcing handle movement without closing the door may result in damage.
- Ensure all work areas are clean and clear of foreign objects.
Full document text
S E R V I C E B U L L E T I N S U B J E C T NUMBER 150-52-188 DOORS (ATA 52) – MAIN ENTRANCE DOOR (MED) – AIRSTAIR – INTERNAL MICROSWITCH ADJUSTMENT JANUARY 15, 2016 Gulfstream SERVICE BULLETIN Service Bulletin No. 150-52-188 Page 1 of 9 DOORS - MAIN ENTRANCE DOOR (MED) - AIRSTAIR - INTERNAL MICROSWITCH ADJUSTMENT PLANNING INFORMATION 150-52-188 1. Effectivity Aircraft serial numbers 201 through 318 2. Concurrent Requirement None 3. Reason Subsequent to a recent event in which the Main Entrance Door (MED) of an Astra aircraft opened during flight, a detailed review of the door rigging and operation determined that, in certain instances, the CABIN DOOR UNLOCK Crew Alerting System (CAS) message may extinguish before the handle latch pin is fully engaged. We have identified an improved switch adjustment that will extinguish the warning light only after the handle latch pin is fully engaged. 4. Description This Service Bulletin provides instructions to adjust the MED internal microswitch in accordance with improved procedures. 5. Compliance Compliance with this Service Bulletin is mandatory at the next suitable planned maintenance period within the next 24 months from the original release date of January 15, 2016. 6. Approval This Service Bulletin has been reviewed by the Civil Aviation Authority of Israel (CAAI). The design content herein complies with the applicable Civil Aviation Regulations and is CAAI approved. January 15, 2016 Gulfstream SERVICE BULLETIN Service Bulletin No. 150-52-188 Page 2 of 9 7. Manpower The following information is for planning purposes only: Estimated labor-hours: 6 8. Weight and Balance Negligible 9. Weight and Balance Negligible 10. Electrical Load Data No change 11. Software Accomplishment Summary None 12. References G150 Aircraft Maintenance Manual (AMM), Chapter 20 Gulfstream Aerospace LP G150 TC design change G15-10083 NOTE: This Service Bulletin incorporates design data approved under G150 TC design change and MOD G15-10083 for installation on the standard type certificated aircraft. Approval for any deviation from the instructions contained in this service bulletin should be obtained, if required, from the local regulatory authority in accordance with the local relevant regulations. 13. Other Publications Affected G150 AMM, Chapter 52 G150 Illustrated Parts Catalog (IPC), Chapter 52 NOTE: Data concerning this Service Bulletin will be published in a future revision of the affected manual(s). This Service Bulletin will provide technical data until the revisions are published. 14. Interchangeability or Intermixability of Parts None January 15, 2016 Gulfstream SERVICE BULLETIN Service Bulletin No. 150-52-188 Page 3 of 9 MATERIAL INFORMATION 1. Material - Price and Availability The parts required to accomplish this Service Bulletin are available by contacting Spare Parts Sales at 800-810-GULF (4853) or 912-965-4178. 2. Warranty Coverage - Component None 3. Material Necessary for Each Aircraft A. Material to be Procured: B. Materials Supplied by Operator: None 4. Reidentified Parts None 5. Special Tooling None New P/N Keyword Old P/N Qty NAS1149G0832P Washer (0.032 inch thick) 3 or (A/R) NAS1149G0816P Washer (0.016 inch thick) 2 or (A/R) New P/N Keyword Old P/N Qty MS20995C32 Safety Wire A/R January 15, 2016 Gulfstream SERVICE BULLETIN Service Bulletin No. 150-52-188 Page 4 of 9 ACCOMPLISHMENT INSTRUCTIONS CAUTION: PROTECT WIRE BUNDLES, CONNECTORS AND SURROUNDING STRUCTURE DURING ANY MAINTENANCE PROCEDURES FROM SHAVINGS, DEBRIS AND CONTAMINATION. MAINTAIN A PROPERLY CLEANED WORK AREA THROUGHOUT THE PROCEDURE TO ENSURE THE INTEGRITY OF THE AFFECTED COMPONENT/SYSTEM. VISUALLY INSPECT WORK AREA USING ADDITIONAL LIGHT AS NECESSARY TO VERIFY ABSENCE OF ANY DEBRIS PRIOR TO COMPLETION OF PROCEDURE. FAILURE TO COMPLY MAY RESULT IN DAMAGE TO COMPONENTS AND/OR SYSTEMS. 1. Prepare aircraft for safe maintenance. Refer to AMM, Safe Ground Maintenance Procedure, Chapter 20. 2. Connect electrical power to aircraft. Refer to AMM, Chapter 20. 3. Perform door airstair inner microswitch, 276H, (3) updated rigging adjustment procedure, as follows (refer to Figure 1): A. Open door and remove access panel 118 from door to access the inner door microswitch (3). Refer to Figure 1, Sheet 1 and 2. B. Pull, tag and install safety clip on Circuit Breaker (CB) 6L on left DC power box in equipment compartment. Refer to AMM, Chapter 24. C. Remove safety wire from jam nut (2). Refer to Figure 1, Sheet 2. D. Hold microswitch (3) securely and remove jam nut (2) at bracket (4). Refer to Figure 1, Sheet 2. NOTE: Depress lever on aft side of door and rotate in order to actuate handle without closing the door. NOTE: CABIN DOOR UNLOCK warning circuit requires both switches be depressed to indicate. Door switch on airframe must be manually depressed to simulate complete circuit. NOTE: Additional washers, P/N NAS1149G0832P and P/N NAS1149G0816P between microswitch, 276H, and bracket are installed in addition to existing washers. E. Add washers (1), P/N NAS1149G0832P and NAS1149G0816P between microswitch, 276H, (3) and bracket (4), so that when the door handle is rotated to the locked position the CABIN DOOR UNLOCK message on CAS should be displayed. Tighten jam nut (2) after each installation of additional washer. Refer to Figure 1, Sheet 2. January 15, 2016 Gulfstream SERVICE BULLETIN Service Bulletin No. 150-52-188 Page 5 of 9 F. Remove washers, P/N NAS1149G0816P, one by one until a combination is obtained that, when the door is closed and the handle latch pin is fully engaged within the stirrup channel, the CABIN DOOR UNLOCK CAS message is extinguished. Refer to Figure 1, Sheet 2, Detail D. CAUTION: THE OVERRIDE TOGGLE LEVER ON AFT SIDE OF DOOR MUST BE DEPRESSED IN ORDER TO MOVE HANDLE TO LOCKED POSITION WITHOUT CLOSING DOOR. FORCING HANDLE MOVEMENT WITHOUT CLOSING DOOR OR DEPRESSING OVERRIDE TOGGLE LEVER MAY RESULT IN DAMAGE TO DOOR.
Show full textShow less
NOTE: After each removal, make sure that the microswitch, 276H, is firmly placed and tightened. NOTE: An equivalent to removing a P/N NAS1149G0816P, 0.016 inch thick, may be removal of one washer P/N NAS1149G0832P, 0.032 inch thick washer, and adding back one P/N NAS1149G0816P, 0.016 inch thick. G. Depress lever on aft side of door and rotate the handle towards the unlocked position until it contacts the stirrup. Ensure the CABIN DOOR UNLOCK CAS message is not displayed. Refer to Figure 1, Sheet 3. H. Remove one more additional washer (1), P/N NAS1149G0816P, 0.016 inch thick. I. Verify the CABIN DOOR UNLOCK CAS message extinguishes only after the stirrup has come up and the handle latch pin is fully engaged in the stirrup channel. Refer to Figure 1, Sheet 2. (1) If CABIN DOOR UNLOCK message displays, add back the washer (1), P/N NAS1149G0816P that was removed in Step 3.H. above. J. Depress lever on aft side of door and rotate the handle towards the unlocked position until it contacts the stirrup. Ensure the CABIN DOOR UNLOCK CAS message is not displayed. Refer to Figure 1, Sheet 3. K. Remove safety clip, tag and depress CB 6L that was pulled in Step 3.B. L. Verify that the inner handle is rotated back to UNLOCKED position. Rotate handle to locked position and verify that handle is locked at the end of travel. M. Ensure CABIN DOOR UNLOCK message on CAS is extinguished. N. Secure jam nut (2) with safety wire, P/N MS20995C32. Refer to Figure 1, Sheet 2. January 15, 2016 Gulfstream SERVICE BULLETIN Service Bulletin No. 150-52-188 Page 6 of 9 O. Disconnect electrical power from aircraft. Refer to AMM, Chapter 20. 4. Ensure all work areas are clean and clear of foreign objects (FOD). 5. Reinstall access panel 118 on MED previously removed in Step 3.A. 6. Record compliance with this Service Bulletin in the aircraft’s permanent maintenance records and return aircraft to flight status. 7. Report compliance with this service bulletin to Gulfstream Computerized Maintenance Program (CMP) by uploading the attached service reply card, along with the CMP task card(s) sign-off using MyGulfstream, MyCMP Document Upload or e-mail to cmp.docproc@gulfstream.com or fax to Gulfstream CMP at 800-944-1775 or 912-963-0265. 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). January 15, 2016 Gulfstream SERVICE BULLETIN Service Bulletin No. 150-52-188 Page 7 of 9 Airstair Door Internal Microswitch - Adjustment Figure 1 (Sheet 1) January 15, 2016 Gulfstream SERVICE BULLETIN Service Bulletin No. 150-52-188 Page 8 of 9 ) SEE DETAILED VIEW IN SHEET 3 Airstair Door Internal Microswitch - Adjustment Figure 1 (Sheet 2) January 15, 2016 Gulfstream SERVICE BULLETIN Service Bulletin No. 150-52-188 Page 9 of 9 Airstair Door Internal Microswitch - Adjustment Figure 1 (Sheet 3) January 15, 2016 SECTION OF THE STIRRUP AND PIN CONTACTING THE CHANNEL FACE WHEN HANDLE IS ROTATED TOWARDS THE UNLOCKING POSITION GULFSTREAM G150 SERVICE BULLETIN NO. 150-52-188 SERVICE REPLY CARD Service Bulletin prepared by Gulfstream Aerospace, 500 Gulfstream Road, P.O. Box 2206, Savannah, Georgia 31402-2206, USA. © 2016 Gulfstream Aerospace. 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. This technical data is controlled under the Export Administration Regulations by General License TSU. It may not be transferred to a third party without the prior written approval of the U.S. Department of Commerce. Please upload this page, along with the CMP task card(s) sign-off using MyGulfstream, MyCMP Document Upload, or e-mail to cmp.docproc@gulfstream.com or fax to Gulfstream CMP at 800- 944-1775 or 912-963-0265. The following Service Bulletin (SB) has been addressed: SB CMP NUMBER A/C AIRCRAFT TYPE COMPLIANCE DATE 981880 Gulfstream G150 Aircraft Hours ______________________ Aircraft Landings_____________________ This Service Bulletin is not applicable because: _______ Serial Number not affected _______ Equipment not installed _______Previously complied with (annotate method of compliance below) _______Other (explain reason below) SIGNATURE TITLE / CERTIFICATE NUMBER COMPANY COMMENTS / SUGGESTIONS / ACTIONS TAKEN: