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DATE
REV
TECHNICAL BULLETIN
A Subsidiary of Textron Inc.
No. 427-02-04
Date May 16, 2002
Page
1 of 4
MODEL AFFECTED:
427
SUBJECT:
INTRODUCTION OF NEW HARDENED WEAR
SLEEVE P/N 427-044-123-101.
HELICOPTERS AFFECTED:
Model 427 helicopters serial number 56001
through 56040 serial number 58001 through
58002.
[Model 427 helicopters serial numbers 56041 and
subsequent and 58003 and subsequent will have
the intent of this bulletin accomplished prior to
delivery.]
www.DataSheet4U.comCOMPLIANCE:
At Customer’s Option. Recommended at next
scheduled component inspection of driveshaft
assembly P/N 427-044-100-103.
DESCRIPTION:
Field reports indicate that the wear sleeves P/N 427-044-117-101 installed on
forward tail rotor driveshaft assembly P/N 427-044-100-103 tends to exhibit a
premature wear groove.
This bulletin introduces an improved, hardened wear sleeve.
APPROVAL:
The engineering design aspects of this bulletin are Transport Canada approved.
AN APPROPRIATE ENTRY SHOULD BE MADE IN THE AIRCRAFT LOGBOOK UPON ACCOMPLISHMENT
IF OWNERSHIP OF AIRCRAFT HAS CHANGED PLEASE FORWARD TO NEW OWNER
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T.B. 427-02-04
Page 2 of 4
MANPOWER:
Approximately 2.0 additional man-hours are required to complete this bulletin when
accomplished in conjunction with a scheduled driveshaft inspection. Man-hours are
based on hands-on time, and may vary with personnel and facilities available.
MATERIALS:
Required Material:
The following material is required for the accomplishment of this bulletin and may be
obtained through your Bell Helicopter Textron Supply Center.
-NOTE-
Parts listed below are in addition to those required for a
regular scheduled component inspection of the driveshaft
assembly P/N 427-044-100-103.
Part Number
Nomenclature
Quantity
427-044-123-101
www.DataSheet4U.comM83248/1-130
Sleeve
Packing
2
2
Consumable Material:
The following material is required to accomplish this bulletin, however this material is
considered consumable (bench stock) material and may not require ordering
depending on the operators consumable material stock levels. This material may be
obtained through your Bell Helicopter Textron Supply Center.
Part Number
Nomenclature
Quantity Reference
204-040-755-005
Lubricant
As
required
C-015
SPECIAL TOOLS:
None required
WEIGHT AND BALANCE:
Not applicable
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427-02-04
Page 3 of 4
ELECTRICAL LOAD DATA:
Not affected
REFERENCES:
BHT-427 -IPB Illustrated Parts Breakdown
BHT-427-MM Maintenance Manual
PUBLICATIONS AFFECTED:
BHT-427 -IPB Illustrated Parts Breakdown
ACCOMPLISHMENT INSTRUCTIONS:
1. Remove forward driveshaft P/N 427-044-100-103 from aircraft per BHT-427-MM
Chapter 65.
2. Disassemble driveshaft per BHT-427-MM Chapter 65.
www.DataSheet4U.com3. Remove and discard wear sleeves P/N 427-044-117-101 and packing P/N
M83248/1-130. (Refer to figure 1).
4. Reassemble driveshaft per BHT-427-MM Chapter 65 using new wear sleeves P/N
427-044-123-101.
5. Re-identify driveshaft data plate and historical service record from P/N 427-
044-100-103 to P/N 427-044-100-103
-105FM.
6. Install forward driveshaft P/N 427-044-100-105FM in the aircraft per BHT-427-
MM Chapter 65.
7. Annotate records to reflect compliance with this bulletin.
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