Summary of the Problem. - TB-1-1520-240-20-1230002

TB 1-1520-240-20-123

(a) Inspect at final destination.

(b) Boeing will inspect DD 250 aircraft prior to those aircraft departing for ferry to final destina-

tion.

Maintenance Trainers (Category A and B). Comply no later than 22 September 2000.

f. Component/Parts in Stock at All Levels (Depot and Others) including War Reserves. Upon receipt

of this Technical Bulletin, Depot and Materiel Activity Commanders will ensure the material condition tags of

all items in all condition codes listed in paragraph 6 with cage code 59213 are annotated to read

"CH--47--00--ASAM--05 (TB 1--1520--240--20--123), Inspection of the Forward and Aft Slider Shaft Seals, Not

Complied With".

(1) Wholesale Stock -- Report receipt of this Technical Bulletin, in accordance with paragraph

14C (1). Upon receipt of this Technical Bulletin, Depot and Materiel Activity Commanders will ensure all ser-

viceable items (condition codes //A//, //B//, //C//, //D//, and //E//) listed in paragraph 6 are placed in condition

code //J// and tagged with a suspended tag/label -- Materiel, DD Form 1575/DD Form 1575-1. Do not remove

original condition tags. Report compliance with this Technical Bulletin in accordance with paragraph 14D (1).

(2) Retail Stock -- Report receipt of this Technical bulletin in accordance with paragraph 14C (2).

Upon receipt of this Technical Bulletin, Commanders and Facility Managers maintaining retail stock at Instal-

lation level and below shall contact the supported aviation unit to perform the procedures required in accor-

dance with paragraphs 8 and 9 on suspect materiel. Dispose of discrepant materiel in accordance with para-

graph 10. Report compliance with this Technical Bulletin in accordance with paragraph 14D. (2).

g. Components/Parts in Work (Depot Level and Others) -- Depot and other Maintenance Activity Com-

manders will ensure items listed in paragraph 6 are not issued until they are in compliance with this Technical

Bulletin.

2. Task/Inspection Suspense Date. Complete the inspection in accordance with paragraph 8 within the

next 10 flight hours but no later than 9 AUG 2000 and report in accordance with paragraph 14B.

3. Reporting Compliance Suspense Date. Report compliance in accordance with paragraph 14A no lat-

er that 16 AUG 2000.

Summary of the Problem.

a. A unit reported receipt of a defective slider shaft seal assembly from the supply system. The metal

portion of the seal assembly extended out to the edge of the rubber seal. This condition places the metal por-

tion of the seal assembly unacceptably close to the vertical rotor shafts.

For manpower/downtime and funding impacts see paragraph 12.

The purpose of this Technical Bulletin is to visually inspect the slider shaft seal assemblies for de-

fects.

End Items to be inspected . All H--47 series aircraft.

Assembly Components to be Inspected.

NOMENCLATURE

PART NUMBER

NATIONAL STOCK NUMBER

SLIDER SHAFT SEAL

145R3131-1

1615-01-113-0258

ASSEMBLY

SLIDER SHAFT SEAL

145R3131-2

1615-01-113-0261

ASSEMBLY

Parts to be Inspected . N/A.

Inspection Procedures.