1. PLANNING INFORMATION A. Effectivity S-92A model helicopters serial numbers 920006 through 920086. NOTE: Component: Tail Pylon, Part Number 92000-06102-041 with greater than 500 flight-hours. Tail Pylon, Part Number 92000-06102-041 with less than 500 flight-hours follow existing 50-hour inspection and temporary revision 5-30 attached. B. Purpose To perform a one-time inspection of the tail pylon for cracks. C. Description Helicopter is prepared for maintenance. The tail pylon leading edge fairing is removed. A one-time inspection is performed for cracks. If cracks are found, Sikorsky Aircraft Customer Service Engineering is contacted. The tail pylon leading edge fairing is reinstalled. Helicopter is returned to service. D. Compliance Compliance is essential. Sikorsky Aircraft Corporation recommends compliance as follows: (1) All tail pylon assemblies with greater than 500 flight-hours, perform the one-time inspection within 10 flight-hours of the issue date of this Alert Service Bulletin (ASB,): THIS ALERT SERVICE BULLETIN IS THE PROPERTY OF SIKORSKY AIRCRAFT CORPORATION AND IS PROTECTED UNDER THE COPYRIGHT LAWS OF THE UNITED STATES AND OTHER COUNTRIES. THIS ALERT SERVICE BULLETIN 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 DISCLOSED, REPRODUCED, OR DISTRIBUTED, IN WHOLE OR IN PART, TO ANY THIRD PARTY, OR ADAPTED AS A DERIVATIVE WORK, WITHOUT THE EXPRESS DOCUMENTED CONSENT OF SIKORSKY AIRCRAFT CORPORATION. ANY ACT IN VIOLATION OF APPLICABLE LAW MAY RESULT IN CIVIL AND/OR CRIMINAL PENALTIES. LIMITED DISTRIBUTION RSIKORSKY AIRCRAFT CORPORATION 1999 ALL RIGHTS RESERVED No. 92-53-001 Subject: FUSELAGE - Tail Pylon - Perform a One-Time Inspection for Cracks

June 23/08 Page 1 of 6 53-60-05(a) If cracks are found, contact Sikorsky Aircraft Customer Service Engineering. (b) If no cracks are found, helicopter is returned to service. E. Approval Inspection item. F. Manpower (Estimated) No. of Men No. of Hours *Man-Hours Perform one-time Inspection 1 2.0 2.0 NOTE: *Estimate does not include time required to prepare helicopter or return it to flight status. G. Material None. H. Tooling Standard flashlight and mirror or equivalent. I. Weight and Balance None. J. Electrical Load Data Not Changed. K. Software Load Data Not applicable. L. References (1) Maintenance Manual SA S92A-AMM-000, Chapter 53-60-05. (2) Maintenance Manual SA S92A-AMM-000, Chapter 54-72-01-900-001. (3) Maintenance Manual SA S92A-AMM-000, Chapter 54-72-01-900-002. M. Attachments None. No. 92-53-001 FUSELAGE - Tail Pylon - Perform a One-Time Inspection for Cracks

1. PLANNING INFORMATION (Continued)

June 23/08 Page 2 53-60-05N. Publications Affected (1) Maintenance Manual SA S92A-AWL-000, Temporary Revision No. 5-28, new 10-Hour Inspection Checklist. (2) Maintenance Manual SA S92A-AWL-000, Temporary Revision No. 5-29, new 10-Hour Inspection. (3) Maintenance Manual SA S92A-AWL-000, Temporary Revision No. 5-30, 50-Hour Inspection. (4) Maintenance Manual SA S92A-AMM-000, Temporary Revision No. 53-01. 2 MATERIAL INFORMATION A. Basis for Material Data Per helicopter 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. QTY NOMENCLATURE PART NO. AS REQ’D COTTON SWAB (1) FED.SPEC GG-A-616, OR EQUIVALENT AS REQ’D ISOPROPYL ALCOHOL (1) COMMERCIAL GRADE, OR EQUIVALENT Procure from local supply. No. 92-53-001 FUSELAGE - Tail Pylon - Perform a One-Time Inspection for Cracks

1. PLANNING INFORMATION (Continued)

June 23/08 Page 3 53-60-05A. Perform one-time inspection of tail pylon as follows: (1) Prepare helicopter for maintenance. (2) Turn off all electrical and hydraulic power. 

## WARNING TO PREVENT INJURY TO PERSONNEL, MAKE SURE ROTOR BRAKE IS ENGAGED. (3) Engage rotor brake. (4) Remove tail pylon leading edge fairing. Refer to Maintenance Manual SA S92A-AMM-000, Chapter 54-72-01-900-001. (a) Clean inspection area surfaces using a cotton swab dampened with Isopropyl Alcohol, (commercial grade or equivalent). Air dry. (b) Visually inspect all visible components and structure for obvious damage, cracks, corrosion and security. (c) Inspect the forward spar left hand side and right hand side cap (flange) and frame for cracks in the region from six inches above the driveshaft tunnel to the bottom of the drive shaft tunnel area and out to skin. No cracks allowed. Refer to Figure 1. 1 If cracks are found, contact Customer Service Engineering for further disposition. 2 If no cracks are found, proceed to next step. NOTE: Use a standard flashlight and mirror. (d) Inspect aft side of forward spar and frame. (e) Visually check all fasteners for security, gapping or cracks in attached structure (cap). NOTE: Make sure area is clean and free of foreign objects. (f) Inspect skin and structure for obvious damage, wrinkles, missing fasteners, cleanliness and corrosion. (5) Install tail pylon leading edge fairing. Refer to Maintenance Manual SA S92A-AMM-000, Chapter 54-72-01-900-002. (6) Helicopter is returned to service. No. 92-53-001 FUSELAGE - Tail Pylon - Perform a One-Time Inspection for Cracks

3. ACCOMPLISHMENT INSTRUCTIONS (Continued)

June 23/08 Page 4 53-60-05B. Record of Compliance (1) Make an appropriate logbook entry to show compliance with this ASB 92-53-001. (2) Upon compliance with this Alert Service Bulletin, complete attached ALERT SERVICE BULLETIN COMPLIANCE RECORD CARD and return it to Sikorsky Aircraft Corporation. No. 92-53-001 FUSELAGE - Tail Pylon - Perform a One-Time Inspection for Cracks

3. ACCOMPLISHMENT INSTRUCTIONS (Continued)

June 23/08 Page 5 53-60-05**INSPECT AREAS ON FORWARD**  **SPAR CAP (FLANGES)** 

**AFT SPAR**  **FORWARD SPAR** 

**6 INCHES ABOVE DRIVESHAFT**  **TUNNEL TO BOTTOM OF THE DRIVESHAFT**  **AREA**

**FWD**

SA **TD1757** INSPECT STRUCTURE FOR OBVIOUS CRACKS FIGURE 1. No. 92-53-001

June 23/08 Page 6 53-60-05

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