# AD 76-13-02: Oil Cooler-To-Fuel Filter Hose

- Type: Airworthiness directive
- Status: Current
- Products: General Electric CT58-100-2, CT58-110-1, CT58-110-2, CT58-140-1 and CT58-140-2
- Effective: July 6, 1976
- Superseded by: Nothing supersedes this AD
- Product type: Engine
- Amendment: 39-2649
- Registered aircraft: 53 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/A1B7C39A1D003BC38625682C00535E9E.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/76-13-02

## The airworthiness directive

76-13-02 GENERAL ELECTRIC COMPANY: Amendment 39-2649. Applies to General Electric Company CT58-100-2, CT58-110-1, CT58-110-2, CT58-140-1, CT58-140-1, Series A/L and CT58-140-2 engine fuel system hose, P/N 37C300486P101, P/N 37C300486P102, or P/N 37C300486P103 with identification band bearing a manufacture date of 1968 or earlier. Hoses with red/orange molded silicone firesleeving are not affected by this AD. Compliance required unless already accomplished, within the next thirty (30) days time in service after the effective date of this AD.

To prevent possible failure of oil cooler-to-fuel filter hose identified above, remove firesleeving from hose and inspect for corrosion or broken braiding in accordance with General Electric Alert Service Bulletin No. A73- 69 or later FAA approved revision, or equivalent inspection method approved by the Chief, Engineering and Manufacturing Branch, New England Region, Federal Aviation Administration. Hoses passing inspection must have new firesleeving applied per Section 72-09-03 of the applicable General Electric Engine Overhaul Manual. Hoses rejected due to this inspection must be replaced with new hose P/N 37C300486P101, P/N 37C300486P102 or P/N 37C300486P103 with identification band bearing a manufacture date of 1969 or later. Approved replacement firesleeving is identified in General Electric Alert Service Bulletin No. A73-69 or later FAA approved revision.

Upon request of the operator, an FAA maintenance inspector, subject to prior approval of Chief, Engineering and Manufacturing Branch, FAA, New England Region, may adjust the compliance time specified in the AD to permit compliance at an established inspection period of the operator if the request contains substantiating data to justify the increase for that operator.

General Electric Company Service Bulletins identified in this directive are incorporated herein and made a part hereof pursuant to 5 U.S.C. 552(a)(1). All persons affected by this directive who have not already received these Service Bulletins from General Electric Company may receive copies upon request to General Electric Company, 1000 Western Avenue, Lynn, Massachusetts 01910. These documents may also be examined at the New England Region, FAA, 12 New England Executive Park, Burlington, Massachusetts 01803, and at FAA Headquarters, 800 Independence Avenue, S.W., Washington, D.C.

A historical file on this AD which includes the incorporated material in full is maintained by the Federal Aviation Administration at its Headquarters in Washington, D.C., and at the New England Regional Office in Burlington, Massachusetts.

This amendment becomes effective July 6, 1976.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS 1E3](https://openairdocs.org/tcds/1E3): General Electric Company; names 5 of 5 models: CT58-100-2, CT58-140-2, CT58-140-1, CT58-110-1, CT58-110-2

## Registered aircraft it may apply to (OpenAirDocs)

Matched by airframe and engine model; the AD's applicability may narrow it by serial number, part number or equipment.

- Aircraft: 53 (0 by airframe model, 53 by engine model)
- Makers: Sikorsky 42, Boeing-Vertol 5, Columbia Helicopters 2, Boeing V-Columbia Helicopters 1, Carson Helicopters / Sikorsky 1, Kawasaki Vertol 1, Vertol 1

Models with the most aircraft:

- [GE CT58-140-2](https://openairdocs.org/engine/ge-ct58-140-2): 33 aircraft (engine model)
- [GE CT58-140-1](https://openairdocs.org/engine/ge-ct58-140-1): 20 aircraft (engine model)

All 2 models: https://openairdocs.org/ad/76-13-02/models.md
Every aircraft: https://openairdocs.org/ad/76-13-02/aircraft.md

Its text cites no advisory circulars or STCs.

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