TB1-2840-248-20-21
(b) Those aircraft that have a DD 250 and are at Boeing will be inspected prior to ferry to final destination.
e. Maintenance Trainers (Category A, and B). N/A.
f. Component/Parts in Stock at All Levels (Depot and Others) Including War Reserves. Upon receipt of this TB, the
material condition tags of all items in all condition codes listed in paragraphs 6 and 7 shall be annotated to read "TB 1-
2840-248-20-21 Inspection of T700-GE-701 Engine Not Complied With." (1) Wholesale Stock. Upon receipt of this TB, all
serviceable items (condition codes //A//, //B//, //C//, //D//, and //E//) listed in paragraphs 6 and 7 located in wholesale depot
storage shall be placed in condition code //J// and tagged with a suspended tag/label Material, DD Form 1576/DD Form
1576-1. Do not remove original condition tags. Report compliance with this TB in accordance with paragraph 14.d.(1).
(2) Retail Stock. Upon receipt of this TB, commanders and others maintaining retail stock at installation level
and below shall contact the supported aviation unit to perform the inspection required by paragraph 8 and the correction
procedures of paragraph 9 on discrepant materiel. Disposition of discrepant materiel will be in accordance with paragraph
g. Components/Parts in Work (Depot Level and Others). Items listed in paragraphs 6 and 7 in work will not be
issued until compliance with this TB.
2.
Task/Inspection Suspense Date. Prior to next flight.
3.
4.
Summary of the Problem.
a. Utilizing input provided by General Electric Aircraft Engines (GEAE), under AMCOM-managed T700 series engine
components improvement program (CIP) contract, the service life limit of some rotating components in the T700-GE-701
engine has been reduced by the engine manufacturer. Continued operation beyond the newly established life limits of the
components could result in failure of the engine.
b. For manpower/downtime and funding impacts, see paragraph 12.
c. The purpose of this TB is to:
(1) Identify gas generator rotor modules having stage 2 aft cooling plates with over 4,000 operating hours and
remove them from service. The life limit of stage 2 aft cooling plate, P/N 6055T24P01, is 4,000 hours.
(2) Collect operating time data on other affected components. The data shall be used to establish revised life
limits to be published in a projected 2d quarter fiscal year (FY) 99 follow-on message.
5. End Items to be Inspected. All AH-64 series aircraft with T700-GE-701 engines installed (P/N 6044T06G01, NSN
2840-01-114-2211).
6.
Assembly Components to be Inspected. The engine records for the following components are to be inspected:
NOMENCLATURE
PART NUMBER
NATIONAL STOCK NUMBER
Engine, Turbine, T700-GE-701
6044T06G01
2840-01-114-2211
Turbine, Rotor, Turbine (also
known as Gas Generator Rotor
Assembly)
Turbine, Rotor, Turbine
6055T26G08
2840-01-298-0693
Turbine, Rotor, Turbine
6055T26G09
2840-01-298-0693
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