# AD 72-23-04: Main Gear Strut Cylinder

- Type: Airworthiness directive
- Status: Current
- Products: Sabreliner NA-265-40 and NA-265-60
- Effective: November 11, 1972
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Large airplane
- Amendment: 39-1553
- Registered aircraft: 14 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/269B3156ECB13CB1862569BB0067B310.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/72-23-04

## The airworthiness directive

72-23-04 NORTH AMERICAN ROCKWELL: Amdt. 39-1553. Applies to Sabreliner Model NA-265-40, Serial Numbers 282-1 thru 282-97; Model NA-265-50, Serial Number 287-1; and Model NA-265-60, Serial Numbers 306-1 thru 306-63.

Compliance required within the next 100 hours' time in service, but not later than 90 days after the effective date of this A.D., whichever occurs first, unless already accomplished within the last 2300 hours' time in service, and thereafter at intervals not to exceed 2400 hours' time in service or 2400 landings, whichever occurs first, from the last inspection.

To detect and remove cracks, tool marks, nicks, scratches, rust or other minor surface blemishes, inspect and rework the main landing gear outer strut cylinder and inner trunnion (cone shaped) surface in accordance with the inspection and rework provisions of North American Rockwell Sabreliner Service Bulletin No. 72-15 dated 30 October 1972 or later FAA-approved revision, or an equivalent procedure approved by the Chief, Aircraft Engineering Division, FAA Western Region.

This amendment becomes effective November 11, 1972.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A2WE](https://openairdocs.org/tcds/A2WE): Sabreliner Aviation LLC; names 2 of 8 models: NA-265-40, NA-265-60

## 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: 14 (14 by airframe model, 0 by engine model)
- Makers: North American 9, Rockwell International 5

Models with the most aircraft:

- [North American NA-265-40](https://openairdocs.org/model/north-american-na-265-40): 6 aircraft (airframe model)
- [Rockwell International NA-265-60](https://openairdocs.org/model/rockwell-international-na-265-60): 4 aircraft (airframe model)
- [North American NA-265-60](https://openairdocs.org/model/north-american-na-265-60): 3 aircraft (airframe model)
- [Rockwell International NA-265-40](https://openairdocs.org/model/rockwell-international-na-265-40): 1 aircraft (airframe model)

All 4 models: https://openairdocs.org/ad/72-23-04/models.md
Every aircraft: https://openairdocs.org/ad/72-23-04/aircraft.md

Its text cites no advisory circulars or STCs.

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