# AD 60-22-02: Combustion Chamber Outer Cases

- Type: Airworthiness directive
- Status: Current
- Products: Pratt & Whitney Division JT3C-6
- Superseded by: Nothing supersedes this AD
- Product type: Engine
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/B027EBCF4DFB42C7862569B20071A2E9.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/60-22-02

## The airworthiness directive

60-22-02 PRATT & WHITNEY: Amdt. 211 Part 507 Federal Register October 22, 1960. Applies to All JT3C-6 Turbojet Engines.

Compliance required as indicated.

  (a) Inspect the entire circumference on the rear face of the rear flange of the combustion chamber outer case assembly P/N 255639, (case detail P/N 255640) outboard of the attaching nuts which secure the combustion chamber outer case to the turbine case as indicated below. Inspection should be performed using approximately 6-power glass. Any crack requires replacement of the case.

  (1) Engines with combustion chamber outer cases which have not been hardness checked per paragraph (b) and Magnaglo inspected must be inspected per above visual inspection every 65 hours' time in service.

  (2) Engines with combustion chamber outer cases which have been hardness checked per paragraph (b) but not Magnaglo inspected must be inspected per above visual inspection every 130 hours' time in service.

  (3) Engines withcombustion chamber outer cases which have been hardness checked per paragraph (b) and Magnaglo inspected do not require visual inspection.

  (b) At overhaul in addition to the visual inspections above:

  (1) Inspect fillet between snap diameter and front face of rear flange using approximately 6-power glass. Any crack requires replacement of the case.

  (2) Check hardness of combustion chamber outer case rear flange at three locations approximately 120 degrees apart between the bolt holes of the flange. If hardness is more than Rockwell C40, the case must be replaced. After one hardness check is accomplished this hardness check is no longer required.

This supersedes AD 60-11-07.

This directive effective October 22, 1960.

Revised November 26, 1960, to all persons not receiving individual notice by telegram dated November 2, 1960.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS E-290](https://openairdocs.org/tcds/E-290): Pratt & Whitney Division; names 1 of 4 models: JT3C-6

## Registered aircraft it may apply to (OpenAirDocs)

No registered aircraft matched the models it names.

Its text cites no advisory circulars or STCs.

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