# AD 62-03-03: Landing Gear Selector Valve Fitting

- Type: Airworthiness directive
- Status: Current
- Products: Sierra Hotel Aero Navion A (Army L-17B and L-17C), Navion B, Navion D, Navion E, Navion F, Navion G and Navion (Army L-17A)
- Effective: March 6, 1962
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Registered aircraft: 828 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/F7635CB5E3E829F086256A56006FE95D.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/62-03-03

## The airworthiness directive

62-03-03 NAVION: Amdt. 396 Part 507 Federal Register February 3, 1962. Applies to Navion, Navion A, B, D, E, F, and G Aircraft.

Compliance required within the next 25 hours' time in service after the effective date of this AD and at each periodic inspection thereafter.

The landing gear selector valve end fitting P/N 145-58145-3 (heat treated and non-heat treated) has a service history of failure during attempts to extend the gear. To preclude further difficulties:

Inspect the gear actuating system in accordance with Navion Service Letter No. 81, dated March 31, 1961. Any defective parts found as a result of this inspection must be replaced prior to further flight.

This supersedes AD 50-24-01.

This directive effective March 6, 1962.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A-782](https://openairdocs.org/tcds/A-782): Sierra Hotel Aero Inc.; names 7 of 8 models: Navion B, Navion (Army L-17A), Navion F, Navion A (Army L-17B and L-17C), Navion D, Navion E, Navion G

## 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: 828 (828 by airframe model, 0 by engine model)
- Makers: Ryan 359, North American 256, Navion 213

Models with the most aircraft:

- [North American NAVION](https://openairdocs.org/model/north-american-navion): 203 aircraft (airframe model)
- [Ryan NAVION](https://openairdocs.org/model/ryan-navion): 170 aircraft (airframe model)
- [Ryan NAVION A](https://openairdocs.org/model/ryan-navion-a): 115 aircraft (airframe model)
- [Navion NAVION A](https://openairdocs.org/model/navion-navion-a): 99 aircraft (airframe model)
- [Ryan NAVION B](https://openairdocs.org/model/ryan-navion-b): 68 aircraft (airframe model)
- [Navion NAVION G](https://openairdocs.org/model/navion-navion-g): 61 aircraft (airframe model)
- [North American NAVION A](https://openairdocs.org/model/north-american-navion-a): 46 aircraft (airframe model)
- [Navion NAVION B](https://openairdocs.org/model/navion-navion-b): 42 aircraft (airframe model)
- [Navion NAVION F](https://openairdocs.org/model/navion-navion-f): 6 aircraft (airframe model)
- [Navion NAVION D](https://openairdocs.org/model/navion-navion-d): 5 aircraft (airframe model)
- [North American NAVION B](https://openairdocs.org/model/north-american-navion-b): 3 aircraft (airframe model)
- [Ryan NAVION G](https://openairdocs.org/model/ryan-navion-g): 3 aircraft (airframe model)
- [North American NAVION F](https://openairdocs.org/model/north-american-navion-f): 2 aircraft (airframe model)
- [Ryan NAVION D](https://openairdocs.org/model/ryan-navion-d): 2 aircraft (airframe model)
- [North American NAVION D](https://openairdocs.org/model/north-american-navion-d): 1 aircraft (airframe model)
- [North American NAVION G](https://openairdocs.org/model/north-american-navion-g): 1 aircraft (airframe model)
- [Ryan NAVION E](https://openairdocs.org/model/ryan-navion-e): 1 aircraft (airframe model)

All 18 models: https://openairdocs.org/ad/62-03-03/models.md
Every aircraft: https://openairdocs.org/ad/62-03-03/aircraft.md

Its text cites no advisory circulars or STCs.

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