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 R SIKORSKY 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 53-60-05
N. 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 53-60-05
A. 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 53-60-05
B. 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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