# AD 73-22-02: Wing Lift Struts

- Type: Airworthiness directive
- Status: Current
- Products: Aircraft Parts & Development A-9, A-9A and A-9B
- Effective: November 20, 1973
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-1737
- Registered aircraft: 53 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/D5EF2870659F6AAD86256A3400480456.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/73-22-02

## The airworthiness directive

73-22-02 AIRCRAFT PARTS and DEVELOPMENT CORP.: Amendment 39-1737. Applies to Models A-9, A- 9A, and A-9B.

Compliance required within the next 100 hours' time in service after the effective date of this AD, unless already accomplished.

To prevent water accumulation in the wing lift struts and associated detrimental effects, accomplish the following:

  (a) Inspect visually for welds on both sides of the four wing lift struts at the P/N 10671 eye fittings. A 360 degree fillet weld is required around the eye fitting shank on both sides of the lift strut to seal the strut against moisture. These fittings provide for attachment of the lift struts to the stabilizing struts.

  (b) If the welds between the eye fittings and the lift struts do not provide a complete seal as specified above, the lift strut should be removed and checked for water ingestion visually and for corrosion by x-ray, ultrasonic or equivalent method approved by the Chief, Engineering and Manufacturing Branch, FAA, Southwest Region.

  (1) If no water or corrosion is present in the strut, weld the eye fitting to the strut 360 degrees on both sides of the strut and reinstall the strut.

  (2) If water is present in the strut (without corrosion), dry the strut, flush with linseed oil, weld the eye fitting to the strut 360 degrees on both sides of the strut and reinstall the strut.

  (3) If corrosion is found, before further flight, the affected lift strut must be replaced or corrosion must be removed in accordance with a procedure approved by the Chief, Engineering and Manufacturing Branch, FAA, Southwest Region.

  (c) If the welds between the eye fittings and the lift struts provide a complete seal as specified above, no further action is required.

(APDC Service Bulletin No. A-23 covers this same subject.) This amendment becomes effective November 20, 1973.

## Affected data sheets (2) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A-758](https://openairdocs.org/tcds/A-758): Aircraft Parts & Development Corp.; names 2 of 11 models: A-9B, A-9
- [TCDS A4WE](https://openairdocs.org/tcds/A4WE): Aircraft Parts & Development Corp.; names 1 of 1 models: A-9A

## 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: 53 (53 by airframe model, 0 by engine model)
- Makers: Aero Commander 31, Callair 12, Intermountain 9, Aircraft Parts & Dev. 1

Models with the most aircraft:

- [Aero Commander CALLAIR A-9B](https://openairdocs.org/model/aero-commander-callair-a-9b): 23 aircraft (airframe model)
- [Callair A-9](https://openairdocs.org/model/callair-a-9): 12 aircraft (airframe model)
- [Intermountain CALLAIR A-9](https://openairdocs.org/model/intermountain-callair-a-9): 9 aircraft (airframe model)
- [Aero Commander CALLAIR A-9](https://openairdocs.org/model/aero-commander-callair-a-9): 7 aircraft (airframe model)
- [Aero Commander CALLAIR A-9A](https://openairdocs.org/model/aero-commander-callair-a-9a): 1 aircraft (airframe model)
- [Aircraft Parts & Dev. A-9B](https://openairdocs.org/model/aircraft-parts-dev-a-9b): 1 aircraft (airframe model)

All 6 models: https://openairdocs.org/ad/73-22-02/models.md
Every aircraft: https://openairdocs.org/ad/73-22-02/aircraft.md

Its text cites no advisory circulars or STCs.

---
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.