# AD 61-22-04: Cabin Pressurization Static System

- Type: Airworthiness directive
- Status: Current
- Products: D & R Nevada 22 and 22M
- Effective: November 21, 1961
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Large airplane
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/EA5B8CBC755CF629862569B200520398.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/61-22-04

## The airworthiness directive

61-22-04 CONVAIR: Amdt. 352 Part 507 Federal Register October 21, 1961. Applies to All Model 22 (880) Aircraft.

Compliance required as indicated.

Reinspection of the pressurization system indicates that under certain conditions a single malfunction in the pressurization static system could cause the aircraft to be pressurized beyond the structural limits. To provide the required level of safety, the following, or FAA approved equivalent shall be accomplished within the next 250 hours' time in service after effective date of this AD:

  (a) Rework existing static system to provide either

  (1) A separate static sensing source for each cabin outflow valve, or

  (2) A static sensing source common to the two outflow valves and a separate static sensing source for the cabin pressure controller.

(Convair Service Bulletin No. 21-23 dated March 25, 1961, covers the same subject.)

This directive effective November 21, 1961.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS 4A27](https://openairdocs.org/tcds/4A27): CV Nevada, LLC; names 2 of 2 models: 22, 22M

## 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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