# AD 62-22-01: Vacuum Pump Modification

- Type: Airworthiness directive
- Status: Current
- Products: Cessna 150, 175, 175A, 175B and 175C with STC SA1-610 or SA1-630
- Effective: October 31, 1962
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Registered aircraft: 1,312 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/22EE98669A2A9DFB86256A1C007490F8.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/62-22-01

## The airworthiness directive

62-22-01 CESSNA: Amdt. 494 Part 507 Federal Register October 16, 1962. Applies to All Models 150, 175, 175A, 175B, and 175C Aircraft Equipped with Continental Engines O-200-A, GO-300-A and GO-300-C Modified to Incorporate Airborne Mechanisms Model 113A5 Vacuum Pumps (Supplemental Type Certificates Nos. SA1-630 and SA1-610 Amended March 13, 1962, Issued to Airborne Mechanisms Division of Randolph Manufacturing Co.).

Compliance required within the next 10 hours' time in service after the effective date of this AD.

In order to prevent failure of the Airborne Mechanisms Model 113A5 vacuum pump because of improper installation, remove and reinstall the pump as follows:

Mount the pump and then remove it from the engine drive pad. The coupling will remain in the engine spline and the separation will occur between the pump shaft and the coupling. The coupling must then be pressed 1/16 inch further into the engine spline. Reinstall the pump, and insure that the steel cross vanes protrude approximately 1/16 inch from the hub of the coupling.

(Airborne Mechanisms Service Letter No. 4 dated May 15, 1962, entitled "Installation Interference of Model 113A5 Drive Splines" covers this same subject.)

This directive effective October 31, 1962.

## Affected data sheets (2) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS 3A17](https://openairdocs.org/tcds/3A17): Textron Aviation Inc.; names 4 of 12 models: 175, 175B, 175C, 175A
- [TCDS 3A19](https://openairdocs.org/tcds/3A19): Textron Aviation Inc.; names 1 of 18 models: 150

## 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: 1,312 (1,312 by airframe model, 0 by engine model)
- Makers: Cessna 1,312

Models with the most aircraft:

- [Cessna 175](https://openairdocs.org/model/cessna-175): 536 aircraft (airframe model)
- [Cessna 150](https://openairdocs.org/model/cessna-150): 387 aircraft (airframe model)
- [Cessna 175A](https://openairdocs.org/model/cessna-175a): 245 aircraft (airframe model)
- [Cessna 175B](https://openairdocs.org/model/cessna-175b): 100 aircraft (airframe model)
- [Cessna 175C](https://openairdocs.org/model/cessna-175c): 44 aircraft (airframe model)

All 5 models: https://openairdocs.org/ad/62-22-01/models.md
Every aircraft: https://openairdocs.org/ad/62-22-01/aircraft.md

## Related documents

- [STC SA1-610](https://openairdocs.org/stc/SA1-610): Wet-to-dry vacuum pump conversion kit 300-2.. Parker Hannifin Corp, Named in the applicability
- [STC SA1-630](https://openairdocs.org/stc/SA1-630): Dry vacuum pump and instrument vacuum system 113A5.. Airborne Mechanisms Div, Named in the applicability

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.