# AD 63-05-03: Wing Main Spar Web Flange

- Type: Airworthiness directive
- Status: Current
- Products: Thrush S-2B, S-2C and S2A
- Effective: March 8, 1963
- Published: March 2, 1963
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Registered aircraft: 12 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/0E9854B4230C90F286256A34004838E3.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/63-05-03

## The airworthiness directive

63-05-03 SNOW: Amdt. 541 Part 507 Federal Register March 2, 1963. Applies to Model S-2 Aircraft Serial Numbers 1003 Through 1162.

Compliance required as indicated.

  (a) Within 10 hours' time in service after the effective date of this AD, inspect the wing main spar upper and lower spar web flange for cracks in the vicinity of the wing-fuselage attach points (approximately wing Station 19), using at least a 10-power glass.

  (b) If cracks are found, repair prior to further flight in accordance with Snow Service Letter No. 23 or FAA Engineering and Manufacturing Branch approved equivalent.

  (c) If no cracks are found, repeat the inspection specified in (a) at intervals not to exceed 25 hours' time in service from the previous inspection.

  (d) The repetitive inspection required by (c) may be discontinued when the modification set forth in Snow Service Letter No. 23 or an FAA Engineering and Manufacturing Branch approved equivalent is incorporated.

This directive effective March 8, 1963.

## Affected data sheets (2) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS 2A7](https://openairdocs.org/tcds/2A7): Thrush Aircraft LLC; names 2 of 3 models: S-2C, S-2B
- [TCDS 2A9](https://openairdocs.org/tcds/2A9): Thrush Aircraft LLC; names 1 of 1 models: S2A

## 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: 12 (12 by airframe model, 0 by engine model)
- Makers: Snow 12

Models with the most aircraft:

- [Snow S2A](https://openairdocs.org/model/snow-s2a): 6 aircraft (airframe model)
- [Snow S2C](https://openairdocs.org/model/snow-s2c): 6 aircraft (airframe model)

All 2 models: https://openairdocs.org/ad/63-05-03/models.md
Every aircraft: https://openairdocs.org/ad/63-05-03/aircraft.md

Its text cites no advisory circulars or STCs.

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