# AD 52-04-02: Inverter Control Protection

- Type: Airworthiness directive
- Status: Current
- Products: Martin-Marietta 202 and 202A
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Large airplane
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/2E0EE3CAE207DE428625698A0073139E.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/52-04-02

## The airworthiness directive

52-04-02 MARTIN: Applies to All Models 202 and 202A Aircraft.

Compliance required not later than August 1, 1952.

Provide separate protection for each inverter control and warning light circuit. Also provide separate protection for T and B warning lights in forward area.

(Trans World Airlines Engineering Order No. 5717 covers this same subject.)

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A-795](https://openairdocs.org/tcds/A-795): Martin-Marietta Corporation; names 2 of 2 models: 202A, 202

## 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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