# AD 47-43-06: Aileron Support Ribs

- Type: Airworthiness directive
- Status: Current
- Products: Cessna 120 and 140
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Registered aircraft: 2,265 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/105922804B33C44386256A3400608189.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/47-43-06

## The airworthiness directive

47-43-06 CESSNA: (Was Service Note 4 of AD-768-5.) Applies to 120 and 140 Aircraft Serial Numbers 8001 to 10209, Inclusive.

Inspection required whenever airplane is tied down in high winds without controls locked and upon each 100 hours of operation until Cessna parts 0422200-2 and 0422200-3 are installed.

Inspect the aileron support ribs for indications of buckling or cracking, particularly in the narrow part of the web at the aft edge of the lightening hole and in the top flange just forward of the doubler plate. Any damaged support rib should be replaced with Cessna parts 0422200-2 (left) and 0422200-3 (right) which are made of 0.051-inch material and have a shorter lightening hole.

(Cessna Service Letter No. 46 dated July 31, 1947, covers this same subject.)

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A-768](https://openairdocs.org/tcds/A-768): Textron Aviation Inc.; names 2 of 2 models: 140, 120

## 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: 2,265 (2,265 by airframe model, 0 by engine model)
- Makers: Cessna 2,265

Models with the most aircraft:

- [Cessna 140](https://openairdocs.org/model/cessna-140): 1,605 aircraft (airframe model)
- [Cessna 120](https://openairdocs.org/model/cessna-120): 660 aircraft (airframe model)

All 3 models: https://openairdocs.org/ad/47-43-06/models.md
Every aircraft: https://openairdocs.org/ad/47-43-06/aircraft.md

Its text cites no advisory circulars or STCs.

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