# AD 70-23-01: Gear Side Strut Spindle Nut

- Type: Airworthiness directive
- Status: Current
- Products: Boeing 747-100 Series
- Effective: November 6, 1970
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Large airplane
- Amendment: 39-1103
- Registered aircraft: 5 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/3ECA6E7340AA1B218625683100716A62.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/70-23-01

## The airworthiness directive

70-23-01 BOEING: Amdt. 39-1103. Applies to Boeing Model 747-100 Series airplanes certificated in all categories. Compliance required within the next 200 hours' time in service after the effective date of this ad, unless already accomplished. To prevent failures of the spindle nut, accomplish the following: Replace the wing gear upper side strut spindle nut in accordance with Boeing Service Bulletin 32-2055 dated October 2, 1970, or later FAA approved revision, or an equivalent method approved by the Chief, Aircraft Engineering Division, FAA Western Region. The amendment becomes effective November 6, 1970.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A20WE](https://openairdocs.org/tcds/A20WE): The Boeing Company; names 1 of 14 models: 747-100 Series

## 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: 5 (5 by airframe model, 0 by engine model)
- Makers: Boeing 5

Models with the most aircraft:

- [Boeing 747-123](https://openairdocs.org/model/boeing-747-123): 2 aircraft (airframe model)
- [Boeing 747-121](https://openairdocs.org/model/boeing-747-121): 1 aircraft (airframe model)
- [Boeing 747-131](https://openairdocs.org/model/boeing-747-131): 1 aircraft (airframe model)
- [Boeing 747-128](https://openairdocs.org/model/boeing-747-128): 1 aircraft (airframe model)

All 4 models: https://openairdocs.org/ad/70-23-01/models.md
Every aircraft: https://openairdocs.org/ad/70-23-01/aircraft.md

Its text cites no advisory circulars or STCs.

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