On this page
ADs that cite it · 2
Newest first, with the revision each names, as OpenAirDocs read it from the AD’s text: check it against the AD.
Text · 14OCR
This text is OCR from a scan. OCR can misread letters and numbers. © Sikorsky. Filed by the FAA in regulations.gov docket FAA-2010-1136; AD 2010-24-04 incorporates this document by reference. Not covered by OpenAirDocs’ CC0 dedication.
Query with SQL
duckdb -csv -c "SELECT p.page, p.text_source, p.text, f.rights_holder, f.license FROM 'https://openairdocs.org/data/latest/service_document_file_page.parquet' p JOIN 'https://openairdocs.org/data/latest/service_document_file.parquet' f USING (file_sha256) WHERE p.file_sha256 = 'eaabf805c11ebe61c2ff39cb93bfd39c67fb1a88ed388b8175bb4aea0a478286' ORDER BY p.page"
Prints the whole list as CSV. It reads the release’s Parquet files over HTTPS, so there’s nothing to download first. Install DuckDB to run it.
SELECT p.page, p.text_source, p.text, f.rights_holder, f.license FROM 'https://openairdocs.org/data/latest/service_document_file_page.parquet' p JOIN 'https://openairdocs.org/data/latest/service_document_file.parquet' f USING (file_sha256) WHERE p.file_sha256 = 'eaabf805c11ebe61c2ff39cb93bfd39c67fb1a88ed388b8175bb4aea0a478286' ORDER BY p.page
Run it at the DuckDB prompt, or in any tool that reads Parquet over HTTPS. More ways to query the release are on Use the data.
Sikorsky Aircraft Corporation Sikorsky 6900 Main Street P.O. Box 9729 A United Technologies Company Stratford, Connecticut 06615-9129
(203) 386-4000
ALERT SERVICE BULLETIN
THIS ALERT SERVICE BULLETIN IS THE PROPERTY OF SIKORSKY AIRCRAFT CORPORATION AND IS PROTECTED UNDER THE COPYRIGHT LAWS OF THE
UNITEO IS DISTRIBUTED ONLY TO OWNERS/OPERATORS OF COMMERCIALLY CERTIFIED
SIKORSKY HELICOPTERS AND SIKORSKY-AUTHORIZED LOGISTIC AND SERVICE CENTERS FOR THE PURPOSE OF FOSTERING THE SAFE AND EFFICIENT
OPERATION OF SUCH HELICOPTERS AND UNDER THE EXPRESS CONDITION THAT THE CONTENTS OF THIS ALERT SERVICE BULLETIN ARE NOT TO BE EXPRESS DOCUMENTED CONSENT OF SIKORSKY ANCRAFT CORPORATION. ANY ACT IN VIOLATION OPTEP LICABLE LAW WAY RESULT IN CIVIL ANDIOR LIMITED DISTRIBUTION & SIKORSKY AIRCRAFT CORPORATION 1999
ALL RIGHTS RESERVED No. 92-63-020 Subject: ROTOR DRIVES - Main Module Assembly - Main Gearbox Assembly - One-Time Visual Inspection of the Mounting Feet Pad, Foot Ribs and to Implement a 10-Hour Recurring Visual Inspection
1. PLANNING INFORMATION A. Effectivity S-92A model helicopters with a main gearbox assembly 92351-15000-042/-043 using main gearbox housing 92351-15110-042/-043/-044/-045.
B. Purpose To perform a one-time visual inspection of main gearbox assembly mounting feet pad and foot ribs for cracks. Also, to implement a new 10-hour recurring visual inspection.
C. Description Helicopter is prepared for maintenance. Foot pad face, top of pad around bolt bushing, and all surfaces of each foot rib are visually inspected for cracks. If a crack is suspected a Fluorescent Penetrant Inspection (FPI) or Dye Penetrant Inspection (alternate) is performed. If crack is found, replace main gearbox prior to next flight. If no crack is found, a 10-hour recurring visual inspection is implemented. Helicopter is returned to service.
D. Compliance Compliance is essential. Sikorsky Aircraft Corporation recommends the one-time visual inspection be performed within 10 flight-hours from the issue date of this Alert Service Bulletin (ASB).
A 10-Hour recurring visual inspection is imposed until further notice.
September 11/09 Page 1 of 11 63-20-01
ALERT SERVICE BULLETIN No. 92-63-020 ROTOR DRIVES - Main Module Assembly - Main Gearbox Assembly - One-Time Visual Inspection of the Mounting Feet Pad, Foot Ribs and to Implement a 10-Hour Recurring Visual Inspection
1. PLANNING INFORMATION (Continued) E. Approval Inspection item F. Manpower (Estimated) No. of Men No. of Hours *Man-Hours Inspection of Main 2.0 2.0 Gearbox Housing Mounting Feet and Foot Ribs for Cracks *Estimate does not include time required to prepare helicopter or return it to flight status.
G. Material None.
H. Tooling
(1) 18-inch inspection mirror with a two inch diameter glass or larger, (or equivalent).
(2) Non-metallic pick or probe, (or equivalent).
(3) Spray bottle, (or equivalent).
(4) Strong (non-LED, white light) flashlight, (or equivalent).
(5) Soft bristled brush, (or equivalent).
Weight and Balance Not affected.
Electrical Load Data Not changed.
K. Software Load Data Not applicable.
L. References Maintenance Manual SA S92A-AMM-000, Chapter 20-06-00-910-005.
(2) Maintenance Manual SA S92A-AMM-000, Chapter 20-06-00-910-006.
September 11/09 Page 2 63-20-01
ALERT SERVICE BULLETIN No. 92-63-020 ROTOR DRIVES - Main Module Assembly - Main Gearbox Assembly - One-Time Visual Inspection of the Mounting Feet Pad, Foot Ribs and to Implement a 10-Hour Recurring Visual Inspection
1. PLANNING INFORMATION (Continued)
(3) Maintenance Manual SA S92A-AMM-000, Chapter 54-40-01-900-001.
(4) Maintenance Manual SA S92A-AMM-000, Chapter 54-40-01-900-002.
(5) Maintenance Manual SA S92A-AMM-000, Chapter 54-40-01-900-003.
(6) Maintenance Manual SA S92A-AMM-000, Chapter 54-40-01-900-004.
(7) Maintenance Manual SA S92A-AMM-000, Chapter 54-40-02-900-001.
(8) Maintenance Manual SA S92A-AMM-000, Chapter 54-40-02-900-002.
(9) Maintenance Manual SA S92A-AMM-000, Chapter 63-20-01-900-001 or 63-20-02-900-001.
(10) Structural Repair Manual SA S92A-SRM-000, Chapter 20-10-00.
M. Publications Affected
(1) Maintenance Manual SA S92A-AWL-000, Temporary Revision No. 5-47, add to the 10- Hour Inspection Checklist.
(2) Maintenance Manual SA S92A-AWL-000, Temporary Revision No. 5-48, revises the 50- Hour Inspection Checklist.
(3) Maintenance Manual SA S92A-AWL-000, Temporary Revision No. 5-49, revises the 500- Hour Inspection Checklist.
(4) Maintenance Manual SA S92A-AMM-000, Chapter 63-20-01. Temporary Revision No. 63- 22 revises the Inspection of Main Gearbox.
N. Attachment None.
September 11/09 Page 3 63-20-01
ALERT SERVICE BULLETIN No. 92-63-020 ROTOR DRIVES - Main Module Assembly - Main Gearbox Assembly - One-Time Visual Inspection of the Mounting Feet Pad, Foot Ribs and to Implement a 10-Hour Recurring Visual Inspection
2. MATERIAL INFORMATION A. Basis for Material Data Per nelicopter.
B. Bill of Material None.
C. Consumable Material
WARNING OBSERVE ALL CAUTIONS AND WARNINGS ON CONTAINERS WHEN
USING CONSUMABLES, WHEN APPLICABLE, WEAR NECESSARY PROTECTIVE GEAR DURING HANDLING AND USE. IF A
CONSUMABLE IS FLAMMABLE OR EXPLOSIVE, MAKE CERTAIN
CONSUMABLE AND ITS VAPORS ARE KEPT AWAY FROM HEAT, SPARK, AND FLAME. MAKE CERTAIN FIREFIGHTING EQUIPMENT IS READILY AVAILABLE PRIOR TO USE. FOR ADDITIONAL
INFORMATION ON TOXICITY, FLASHPOINT, AND FLAMMABILITY OF
CHEMICALS, CONSULT YOUR MEDICAL PEOPLE, OR THE MANUFACTURER OF THE CONSUMABLE.
INSTRUCTIONS/
QTY KEY WORD NOMENCLATURE DISPOSITION AS REQ'D BRULIN CLEANER SD 1291, OR EQUIVALENT (1) AS REQ'D CLEAN, LOW-LINT CLOTH A-A-59323, OR EQUIVALENT (2) AS REQ'D CORROSION PREVENTIVE MIL-DTL-85054, OR (3)
COMPOUND EQUIVALENT AS REQ'D DYE PENETRANT ALTERNATE USE TO FPI, (2)
INSPECTION OR EQUIVALENT AS REQ'D FLUORESCENT PENETRANT (FPI) KIT, OR EQUIVALENT (2)
INSPECTION (FPI) KIT AS REQ'D SOAP SOLUTION WATER/SOAP SOLUTION, (2) (HALF WATER AND HALF SOAP) September 11/09 Page 4 63-20-01
ALERT SERVICE BULLETIN No. 92-63-020 ROTOR DRIVES - Main Module Assembly - Main Gearbox Assembly - One-Time Visual Inspection of the Mounting Feet Pad, Foot Ribs and to Implement a 10-Hour Recurring Visual Inspection
2. MATERIAL INFORMATION
(1) Manufactured by Brulin Corporation, Indianapolis, IN. Telephone Numbers: (317) 923-3211 or 800-776-7149.
(2) Procure from local supply.
(3) Manufactured by NS&L, Website: http://www.nationalsealants.com/contact.html.
3. ACCOMPLISHMENT INSTRUCTIONS A. Perform a one-time visual inspection of main gearbox assembly mounting feet and foot rib for cracks as follows:
(1) Prepare helicopter for maintenance.
(2) Turn off all electrical and hydraulic power.
WARNING TO PREVENT ELECTRICAL SHOCK OF PERSONNEL, MAKE SURE TO DEENERGIZE ELECTRICAL POWER.
(3) Deenergize all electrical power.
WARNING TO PREVENT INJURY OF PERSONNEL, MAKE SURE TO DEENERGIZE HYDRAULIC POWER.
(4) Deenergize all hydraulic power.
(5) At each mounting foot, apply soap/water solution (half water and half soap) via a spray bottle, (or equivalent). Using clean, low-lint cloth (or equivalent), wipe dry and remove all oil, dirt, and debris from each mounting foot.
(6) Using a strong white light non-LED flashlight (or equivalent), and inspection mirror, (or equivalent), visually inspect each mount foot for cracks. Inspect the follow areas: Refer to Figure 1 for definition of areas, and Figure, 2, 3, and 4 for examples of cracks.
(a) Foot pad face.
(b) Top of pad around bolt bushing.
(C) All surfaces of each foot rib.
NOTE: Immediately contact Customer Service Engineering at 1-800-WINGED-S or 1- 203-416-4299, to report any crack with the following information: Date Inspection Performed, Customer/Operator Name, Installed on Helicopter Serial Number, Main Gearbox Serial Number, Main Gearbox Total Time, Helicopter Total Time, Location of Crack.
September 11/09 Page 5 63-20-01
ALERT SERVICE BULLETIN No. 92-63-020 ROTOR DRIVES - Main Module Assembly - Main Gearbox Assembly - One-Time Visual Inspection of the Mounting Feet Pad, Foot Ribs and to Implement a 10-Hour Recurring Visual Inspection
3. ACCOMPLISHMENT INSTRUCTIONS (Continued)
(a) If crack is clearly visible, replace main gearbox prior to next flight. Refer to Maintenance Manual SA S92A-AMM-000, Chapter 63-20-01-900-001 or 63-20-02-900-
001.
(e) If crack is suspected, perform Fluorescent Penetrant Inspection (FPI). Proceed to section B.
Visually inspect each mounting foot area for corrosion (bubbled paint) and/or paint discoloration. Treat corrosion. Refer to Structural Repair Manual SA S92A-SRM-000, Chapter 20-10-00.
(8) Return helicopter to service.
B. Fluorescent Penetrant Inspection (FPI):
NOTE: This follow-on inspection is to be performed only if a crack is suspected.
(1) Gain direct visual access to suspected area(s) by removing covers, panels, and/or components as required.
(a) Remove LH and RH lower covers. Refer to Maintenance Manual SA S92A-AMM-000, Chapter 54-40-02-900-001.
(b) Remove center cover. Refer to Maintenance Manual SA S92A-AMM-000, Chapter 54- 40-01-900-001.
(c) Remove rear cover. Refer to Maintenance Manual SA S92A-AMM-000, Chapter 54-40- 01-900-003.
NOTE: Do not remove sealant around mounting foot pads and mounting bolt heads when performing FPI.
(2) Using clean, low-lint cloth (or equivalent), and Brulin cleaner (or equivalent), clean suspected area.
(3) Using a soft bristle brush, (or equivalent) clear any remaining dirt or debris from inspection areas. If paint is flaked or chipped, use brush bristles or non-metallic pick or probe (or equivalent) to remove flakes.
(4) Visually confirm start and stop locations of suspected crack.
NOTE: Dye Penetrant Inspection may be used as an alternate to FPI. Refer to Maintenance Manual SA S92A-AMM-000, Chapter 20-06-00-910-006.
September 11/09 Page 6 63-20-01
ALERT SERVICE BULLETIN No. 92-63-020 ROTOR DRIVES - Main Module Assembly - Main Gearbox Assembly - One-Time Visual Inspection of the Mounting Feet Pad, Foot Ribs and to Implement a 10-Hour Recurring Visual Inspection
3. ACCOMPLISHMENT INSTRUCTIONS (Continued) Perform FPI of area to confirm direct visual inspection findings. Refer to Maintenance Manual SA S92A-AMM-000, Chapter 20-06-00-910-005.
NOTE: Immediately contact Customer Service Engineering at 1-800-WINGED-S or 1-203- 416-4299, to report any crack with the following information: Date Inspection Performed, Customer/Operator Name, Installed on Helicopter Serial Number, Main Gearbox Serial Number, Main Gearbox Total Time, Helicopter Total Time, Location of Crack.
(a) If cracks are confirmed by FPI, replace main gearbox prior to next flight. Refer to Maintenance Manual SA S92A-AMM-000, Chapter 63-20-01-900-001 or 63-20-02-900-
001.
NOTE: Corrosion Preventive Compound MIL-PRF-16173 may be used as an alternate to Corrosion Preventive Compound MIL-DTL-85054.
(D) If cracks are not found apply corrosion preventive compound (MIL-PRF-16173, or equivalent) to mounting feet.
(6) Install covers, panels, and/or components previously removed:
(a) LH and RH lower covers. Refer to Maintenance Manual SA S92A-AMM-000, Chapter 54-40-02-900-002.
(b) Center cover. Refer to Maintenance Manual SA S92A-AMM-000, Chapter 54-40-01-900-
002.
(c) Rear cover. Refer to Maintenance Manual SA S92A-AMM-000, Chapter 54-40-01-900-
004.
(7) Make sure area is clean and free of foreign objects.
(8) Return helicopter to service.
C. Record of Compliance
(1) Make an appropriate logbook entry to show compliance with this ASB 92-63-020.
(2) Upon compliance with this Alert Service Bulletin, complete attached ALERT SERVICE BULLETIN COMPLIANCE RECORD CARD and return it to Sikorsky Aircraft Corporation.
September 11/09 Page 7 63-20-01
ALERT SERVICE BULLETIN No. 92-63-020 FOOT RIBS:
FOR THE 92351-15110-042
THERE ARETHREE MAIN
GEARBOX HOUSING RIBS TO BE INSPECTED.
FOOT PAD FACE FOOT PAD TOP (VERTICAL) (HORIZONTAL) TYPICAL 4 PLACES TD1986
MOUNTING FOOT AREA DEFINITION FIGURE 1 September 11/09 Page 8 63-20-01
ALERT SERVICE BULLETIN No. 92-63-020
EXAMPLE OF RIGHT
HAND FOOT CRACK TD 1987
EXAMPLE OF CRACK IN MOUNTING FOOT PAD FACE FIGURE 2 September 11/09 Page 9 63-20-01
ALERT SERVICE BULLETIN No. 92-63-020
EXAMPLE OF CRACK IN MOUNTING FOOT T01988
EXAMPLE OF CRACK IN MOUNTING FOOT PAD TOP FIGURE 3 September 11/09 Page 10 63-20-01
ALERT SERVICE BULLETIN No. 92-63-020
EXAMPLE OF FOOT RIB CRACK TD1989
EXAMPLE OF CRACK IN MOUNTING FOOT PAD RIB FIGURE 4 September 11/09 Page 11 63-20-01
(Fold over and tape closed)
SIKORSKY AIRCRAFT CORPORATION FACSIMILE NUMBER (860) 998-7565 ATTENTION: WCS PRODUCT SAFETY MANAGER
WORLDWIDE CUSTOMER SERVICE
IMPORTANT NOTICE Upon COMPLIANCE with the attached ASB, Sikorsky requests your cooperation in completing and returning by mail or FAX this ENTIRE PAGE.
Please fill in the requested information at the bottom of the page, so we may maintain proper records documenting the configuration of your aircraft. This information is useful when determining configuration and effectivity of issues affecting fielded aircraft.
This request is in keeping with our policy to assure that our customers receive the latest information applicable for the maintenance of your aircraft. Thank you.
ALERT SERVICE BULLETIN: No. 92-63-020 Compliance Record Card TITLE: ROTOR DRIVES - Main Module Assembly - Main Gearbox Assembly - One-Time Visual Inspection of the Mounting Feet Pad, Foot Ribs and to Implement a 10- Hour Recurring Visual Inspection OWNER/OPERATOR:
SUBMITTED BY: DATE_
FOLLOWING SERIAL NUMBERS ARE NOT AFFECTED BY THIS ASB
ASB HAS BEEN COMPLIED WITH ON THE FOLLOWING SERIAL NUMBERS (Fold Up to Arrows) SA 7673-2 Rev B